Fabricated Metal Products Research Articles

New demand forecast for vocational high school graduates in regional strategic industries : Focusing on comparison between Daejeon and Jeonnam

이 연구의 목적은 지역전략산업에 따른 특성화고 졸업자의 신규수요를 예측함으로써 지역별 중등단계 직업교육의 정책수립과 특성화고의 변화에 필요한 기초 자료를 제공하는데 있다. 이를 위해 대전과 전남을 중심으로 지역전략산업을 선정하고, 특성화고 졸업자의 신규수요를 산업별 및 직업별로 예측하였다. 연구결과는 다음과 같다. 첫째, 입지상 분석 및 변이할당 분석 결과, 대전과 전남의 전략산업은 서로 다른 양상을 보이는 것으로 확인되었다. 대전은 전남과 달리 `음식료품 및 담배 제조업`, `목재, 종이, 인쇄 및 복제업`, `공공행정, 국방 및 사회보장 행정`과 `전기 전자 및 정밀기기 제조업`이 전략산업에 포함되었다. 전남은 대전에서는 도출되지 않은 `기계 운송장비 및 기타 제품 제조업`, `비금속광물 및 금속제품 제조업`, `전기, 가스, 증기 및 수도사업`, `석탄 및 석유, 화학제품 제조업`, `광업`, `농림어업` 등이 지역전략산업으로 도출되었다. 둘째, 대전과 전남의 특성화고 졸업자에 대한 산업별 직업별 신규수요 역시 서로 다른 양상을 보였다. 대전은 제조업을 중심으로 신규수요가 많은 반면, 전남은 서비스업을 중심으로 신규수요가 많을 것으로 예측되었다. 직업별로는 대전이 전문가 및 관련 종사자의 신규수요 비중이 많은 것과 달리, 전남은 사무 종사자와 서비스 종사자의 신규수요 비중이 많았다. 셋째, 각 직업별 신규수요 중 지역전략산업에서 발생하는 신규 수요의 비중은 대전과 전남에서 모두 높았다. 넷째, 대전과 전남의 특성화고 졸업자에 대한 신규수요를 산업의 입지계수와 변화효과 측면에서 분석한 결과, 대전과 전남 모두 총 변화효과가 정적인(+) 산업들에서 많은 신규수요를 보였다. 입지계수 측면에서는 대전과 전남이 서로 다른 결과를 보였다.The purpose of this study was to provide basic data for policy making for secondary vocational education in each region and transformation in vocational high schools. To achieve this, the regional strategic industries in Daejeon and Jeonnam were selected, new demand for vocational high school graduates was forecasted in each industry and occupation. The results of the study are as follows. First, locational quotient analysis and regional shift-share analysis revealed that Daejon and Jeonnam have different strategic industries. Daejon, unlike Jeonnam strategically develops `manufacturing food, beverage and tobacco`, `manufacturing timber and paper, printing and copying`, `public service and administration of national defense and social security` and `manufacturing electrical devices, electronics and precision devices`. Jeonnam has specialized industries distinguished from Daejon`s, which are `manufacturing of machinery transportation equipments and etc`, `manufacturing of non-metallic minerals and metal products`, `electric, gas, steam and water supply systems/industries`, `manufacturing coal and chemical products, refining petroleum`, `mining` and `agriculture, forestry and fishery`. Second, new demand for vocational high school graduates by occupations and industries showed regional differences(in Daejon and Jeonnam). According the forecast, Daejon will have many workforce demands based on manufacturing industries, on the other hand Jeonnam`s focused on service industries. Analysis by occupations was also different, Daejon showed high demands on professional and related workers, while Jeonnam requested many new office and service workers. Third, new workforce demand by occupations in regional strategic industries is big part of overall new workforce demand both in Daejon and Jeonnam. Forth, according to the results of analyzing the new demand for vocational high school graduates in Daejeon and Jeonnam in terms of industry location quotient and change effect, there was high demand in industries with positive total change effects. In terms of location quotient, Daejeon and Jeonnam showed different results.

Industrial Structure of Prefectures in Japan

I would like to highlight two local prefectures in Japan, Fukui prefecture and Toyama prefecture. I live in Fukui prefecture and it has Toyama as neighbor. This research uses 2011 Input-Out Tables of Fukui and Toyama prefectures and examines the index of power of and the index of sensitivity of of each industry. It also gets production inducement values by consumption, investment, and export (and outflow to other prefectures). With these values, we can compare two prefectures’ industrial structure. The values of index of power of dispersion show some different industries in higher ranked industries, which have bigger economic effect. Moreover, Information and communications industry is ranked at seventh in Fukui and Iron and Steel industry has eighth position in Toyama. On other hand, index of sensitivity of dispersion’s values indicate that industries at higher rank have similarity though rankings are somewhat different. In addition, Finance and insurance is ranked at sixth in both Fukui and Toyama. Real estate industry has seventh and eighth position in Fukui and Toyama respectively. Seeing inducement effect of export and outflow to other prefectures, Fukui’s Electricity, Gas, and Heat supply industry and Toyama’s Chemical products industry have outstanding values. Furthermore, two industries characterize Fukui and Toyama about effect to employment. That is to say, third ranked industries are Textile mill products and Fabricated metal products respectively. Fukui and Toyama are in same area, we call Hokuriku. However, they don’t necessarily have same industrial structure.

3D sand printing for automotive mass production applications

Additive manufacturing (AM) of metallic products is seen by many to be commercially viable for only small and highly complex components, manufactured with difficult to machine materials using heat sintering process. In the automotive manufacturing sector, metal hard tooling is often required to produce mass produced components, and the tools are typically bespoke, large in size, inflexible and complex. Conventionally these tools have either been machined from solid billets or near-net-shape cast and then machined to achieve final size. Rapid casting technologies (RCT) use AM 3D sand printing process to manufacture sand mould tools used to create the production tooling. Adopters of this technology can achieve an increasingly agile and robust production process, RCT can also rewrite the design hand book for casting design. The research findings demonstrate that RCT can be successfully applied within the automotive industry, achieving considerable cost and time savings whilst improving quality and product flexibility.

3D sand printing for automotive mass production applications

Additive manufacturing (AM) of metallic products is seen by many to be commercially viable for only small and highly complex components, manufactured with difficult to machine materials using heat sintering process. In the automotive manufacturing sector, metal hard tooling is often required to produce mass produced components, and the tools are typically bespoke, large in size, inflexible and complex. Conventionally these tools have either been machined from solid billets or near-net-shape cast and then machined to achieve final size. Rapid casting technologies (RCT) use AM 3D sand printing process to manufacture sand mould tools used to create the production tooling. Adopters of this technology can achieve an increasingly agile and robust production process, RCT can also rewrite the design hand book for casting design. The research findings demonstrate that RCT can be successfully applied within the automotive industry, achieving considerable cost and time savings whilst improving quality and product flexibility.

Measuring Plant Level Energy Efficiency and Technical Change in the U.S. Metal-Based Durable Manufacturing Sector Using Stochastic Frontier Analysis

This study analyzes the electric and thermal energy efficiency for five different metal-based durable manufacturing industries in the United States from 1987-2012 at the 3 digit North American Industry Classification System (NAICS) level. Using confidential plant-level data on energy use and production from the quinquennial U.S. Economic Census, a stochastic frontier regression analysis (SFA) is applied in six repeated cross sections for each five year census. The SFA controls for energy prices and climate-driven energy demand (heating degree days - HDD - and cooling degree days - CDD) due to differences in plant level locations, as well as 6-digit NAICS industry effects. A Malmquist index is used to decompose aggregate plant technical change in energy use into indices of efficiency and frontier (best practice) change. Own energy price elasticities range from -.7 to -1.0, with electricity tending to have slightly higher elasticity than fuel. Mean efficiency estimates (100 percent equals best practice level) range from a low of 32 percent (thermal 334 - Computer and Electronic Products) to a high of 86 percent (electricity 332 - Fabricated Metal Products). Electric efficiency is consistently better than thermal efficiency for all NAICS. There is no clear pattern to the decomposition of aggregate technical Thermal change. In some years efficiency improvement dominates; in other years aggregate technical change is driven by improvement in best practice.

Use Zircon-Ilmenite Concentrate in Steelmaking

Market requirements cause a constant search for new materials and technologies, for their immediate use in increasing requirements for material and energy efficiency, as well as to the quality of steel. In practice, steel production in the tended recently of more stringent requirements for the chemical composition of the steel and its contamination by nonmetallic inclusions, gas and non-ferrous metals. The main ways of increasing of strength and performance characteristics fabricated metal products related to the profound and effective influence on the crystallizing metal structure by furnace processing of the melt with refining and modifying additives. It can be argued that the furnace processing of steel and iron chemically active metals (alkali-earth metals, rare-earth metals, and others.) is an integral part of modern production of high quality products and competitive technologies.Important condition for development of methods secondary metallurgy of steel is the use of relatively inexpensive materials in a variety of complex alloys and blends, allowing targeted control of physical and chemical state of the molten metal and, therefore, receive steel with improved performance. In this connection the development of modifying natural materials metallurgy technologies presented complex ores containing titanium and zirconium, is a very urgent task.

Effect of aqueous seed extract of <i>Nigella sativa</i> on lead-induced cerebral cortex toxicity in Long Evans rats

Lead (Pb) is a widespread toxic metal found in the environment with potential danger to human health. It is used in the manufacture of batteries, metal products, paints and other domestic substances. This study investigated the effect of aqueous seed extract of Nigella sativa on leadinduced cerebral cortex toxicity in Long Evan’s rats. Twenty five Long Evans rats divided into five groups of five animals were used for the study. Group I received Distilled water, group II received aqueous seed extract of Nigella sativa (1000mg/kg), group III received lead (60mg/kg), group IV received lead (60mg/kg) followed by aqueous seed extract of Nigella sativa (1000mg/kg) and group V received lead (60mg/kg) followed by aqueous seed extract of Nigella sativa (500mg/kg) via oral intubation. Elevated Plus Maze (EPM) was used to study anxiety-like behaviour. Activities on the elevated plus maze showed that there was no statistically significant decreased rate of anxiety across the groups (P>0.05). The histology of the cerebral cortex of long Evans rats in group IV that received Lead (60 mg/kg) followed by aqueous seed extract of Nigella sativa (1000mg/kg) showed mild neuronal damage while the histology of group V animals that received lead (60mg/kg) followed by aqueous seed extract of Nigella sativa (500mg/kg) showed severe neuronal damage. It can be concluded that aqueous seed extract of Nigella sativa at high dose have more therapeutic effect than at low dose.Keywords: lead, Nigella sativa, elevated plus maze, cerebrum

Additive manufacturing of metal products (Review)

Additive manufacturing of metal products (Review)

Аддитивное производство металлических изделий (Обзор)

Аддитивное производство металлических изделий (Обзор)

Influence of steel shot size on the permeability of mould

Summary Casting is one of the commonly used techniques in industries for the manufacturing of metal products. Although sand is used as a mould material for casting, its permeability and thermal conductivity are very low and hence affects the microstructure and mechanical properties of the cast product. Therefore using alternate material for the mould may result in better permeability, heat transfer rate and thereby better properties. In the present work, steel balls are used as mould material and the effect of grain size on the permeability of the mould material is studied. Steel balls of different diameters namely 0.18 mm, 0.6 mm and 1 mm which are commercially available were used. From the experiments conducted, it is confirmed that coarser steel balls showed more permeability and thereby can help in easy escape of hot gases (from the molten metal and mould material) during pouring of molten metal into the mould.

From Farm Tools to Electric Cars

It is now recognised that China’s industrial clusters have played a particularly significant part in the prodigious economic transformations the country has experienced since the launch of reforms at the end of the 1970s. By studying the case of Yongkang, a county-level city in Zhejiang Province specialising in the manufacture of metal products, this article aims to increase understanding of how this rural area with a tradition of small-scale metal production has become, over the course of a few decades, an industrial cluster built around specific operations, and which economic, social, and political approaches have made these transformations possible.

Black carbon emissions from trucks and trains in the Midwestern and Northeastern United States from 1977 to 2007

We have developed a framework to estimate BC emissions from heavy-duty diesel trucks and trains engaged in transporting freight in the Midwestern and Northeastern United States (MNUS) from 1977 to 2007. We first expand on a previous development of a regional econometric input–output model (REIM) that has been used to estimate commodity flows between 13 states in the MNUS (plus the rest of the US) and 13 industrial sectors. These commodity flow data are then distributed over the MNUS using a stylized link-and-node network, which creates great circle transportation links between nodes in each state at the county with the largest population. Freight flows are converted to BC transportation emissions and the resulting BC emissions are compared to the MACCity BC emissions inventory. We find that from 1977 to 2007 potential emission growth from the continued increase in freight tonnage in the MWUS is counteracted by decreases in the BC emission factor of heavy-duty diesel trucks, which results in an overall decrease of BC emissions by 2007. One sector (fabricated metal product manufacturing) has dominated the BC transportation emissions throughout 1977 to 2007 with transportation emissions remaining relatively unchanged from 1977 to 1997 and then decreasing out to 2007. The BC transportation emissions are concentrated in and around the urban centers, which serve as transportation and production nodes for industrial manufacturing. Our BC emissions are distributed along stylized transportation corridors that are not well represented in emissions inventories that largely distribute emissions via a population proxy. The framework established in this study can be used to estimate future BC transportation emissions under a set of stylized economic, technological, and regulatory scenarios.

Temperature modes and critical velocities during wire drawing

Rod and wire product manufacturing is usually accompanied by residual stresses. The reason for this is both plastic deformation and potential thermoplastic deformation that occurs due to the contact frictional heating of metal surfaces. Undesirable residual stresses in the surface layers affect the accuracy and increase the probability of hardware destruction that can be observed in drawing product manufacturing. The authors of the article propose a method of determining the contact heating conditions based on the criteria of residual stress prevention. Temperature conditions causing thermoplastic deformations are determined according to thermoelasticity equations. Critical values are calculated for the temperature difference between the center and the surface of the stretched wire, at which the latter transits to a plastic state followed by residual stress formation. The limiting drawing velocities for a number of nonferrous metals (copper, zirconium, titanium) are defined. The excess of those top velocities will lead to undesirable residual stresses in the stretched product. It is proposed as a recommendation to increase the critical speed by creating hydrodynamic (fluid) friction conditions in metal products manufacturing.

Supply chain-linked sustainability assessment of the US manufacturing: An ecosystem perspective

This paper addresses the ecological resource consumption extents of the US manufacturing industries with a specific focus on renewable and non-renewable resource indicators from the national economic viewpoint. A hierarchical methodology was employed to quantify renewable and non-renewable resource life cycle inventory associated with the nation’s manufacturing sectors and to evaluate the ecological sustainability performance. Therefore, first, ecological life cycle inventory of renewable and non-renewable resource consumption of 53 national manufacturing sectors was quantified with the ecologically-based life cycle assessment framework, and then, ecological sustainability performance assessment was performed based on well-known metrics such as loading ratio (LR), renewability ratio (RR) and non-renewable based eco-efficiency (NREE). Results indicated that nonferrous metal and nonmetallic mineral product manufacturing sectors were the drivers of non-renewable resource consumption, which caused these industries, have the least nonrenewable eco-efficiency (NREE) scores, renewability ratios (RRs) and the highest environmental loading ratios (LRs). Ecological life cycle inventory results indicated that nonferrous metal production and processing non-renewable resource consumption shares ranged between 46% and 55% in the entire supply chain network. Additionally, nonmetallic mineral product manufacturing had usage share of various non-renewable resources between 23% and 74% of the supply chains’ total usage. Besides, food, tobacco and apparel manufacturing were found to have the highest RRs where the average NREE was found to be 0.4. Furthermore, sensitivity analysis of non-renewable resource indicators to NREE scores indicated that the average sensitivity ratios ranged between 5.1% and 22.4%, where ‘Talc and pyrophyllite’ was found to have the highest sensitivity.

Business models along supply chain position and servitisation: An empirical investigation of European manufacturers

Competitive pressures of the world economy are continuously reshaping the global supply chains of manufacturing firms. At the same time, global competition is altering the nature of output offered by manufacturers, shifting it towards a higher share of service elements. The goal of this paper is to investigate how these two factors are combined, using a sample of manufacturing companies from 13 European countries belonging to the assembly industries of fabricated metal products, machinery and equipment. The results indicate that different business models became dominant in the less developed Eastern European and the developed Western European region. Involving measures of business performance and reasons for plant location, this study also argues that in terms of service offerings and supply chain position, other types of business models can coexist and successfully prevail in the two regions.

DEEPENING OF INTEGRATION AS THE KEY TO COMPETITIVENESS OF METALLURGICAL COMPLEX

The reasons are considered and new actions on a conclusion of the enterprises of a metallurgical complex of Russia from crisis are put forward. It is possible to carry to them: legal methods, modification in the law on Open Society, regulation of volumes of manufacture of metal products in branch.

Impact of political dispute on international trade based on an international trade Inoperability Input-Output Model: A case study of the 2012 Diaoyu Islands Dispute

While political disputes occur frequently and widely among many countries, their impact on the international trade is unclear and less systematically investigated. Considering the 2012 Diaoyu Islands Dispute, under several premised assumptions, this paper applies the international trade Inoperability Input-Output Model to determine the indirect economic loss and to screen out Chinese industries that are sensitive to the dispute. Results based on Leontief's technical coefficients matrix show that the total indirect economic loss of China's gross trade is between RMB 540.4226 billion and RMB 1023.3068 billion. Industries that are sensitive to the dispute include electrical equipment and machinery, general special equipment manufacturing, metal smelting and rolling processing, manufacture and processing of metals and metal products, and chemical. The empirical findings suggest that China establish an early-warning mechanism and trade assistance system, so that key industries that were damaged could be properly compensated.

The monitoring of technological stresses by the method of magnetic noise

Experience in the use of the magnetic-noise method, which is based on recording magnetization-reversal jumps (Barkhausen jumps), for the nondestructive testing of the stress state of metal steel products is presented based on the following examples: the torsion shafts of tracked vehicles, bearings, assembly frames of the gear legs of aircraft, and pipes of the oil and gas industry. It was shown that the magnetic-noise method is useful when debugging and improving the techniques for the manufacturing of metal products and for the step-by-step checking of residual stress during the production process.

Blood lead levels of Korean lead workers in 2003-2011.

ObjectivesThis study aimed to document the trend in blood lead levels in Korean lead workers from 2003 until 2011 and blood lead levels within each of the main industries.MethodsNine years (2003–2011) of blood lead level data measured during a special health examination of Korean lead workers and collected by the Korea Occupational Safety and Health Agency were analyzed. Blood lead levels were determined by year, and a geometric mean (GM) was calculated for each industry division.ResultsThe overall GM blood lead level for all years combined (n = 365,331) was 4.35 μg/dL. The GM blood lead level decreased from 5.89 μg/dL in 2003 to 3.53 μg/dL in 2011. The proportion of the results ≥30 μg/dL decreased from 4.3% in 2003 to 0.8% in 2011. In the “Manufacture of Electrical Equipment” division, the GM blood lead level was 7.80 μg/dL, which was the highest among the industry divisions. The GM blood lead levels were 7.35 μg/dL and 6.77 μg/dL in the “Manufacturers of Rubber and Plastic Products” and the “Manufacture of Basic Metal Products” division, respectively.ConclusionsThe blood lead levels in Korean lead workers decreased from 2003 to 2011 and were similar to those in the US and UK. Moreover, workers in industries conventionally considered to have a high risk of lead exposure also tended to have relatively high blood lead levels compared to those in other industries.

Manganese-based alloy for modification with barium

By thermodynamic-diagram analysis of the BaO-SiO2-MnO-FeO and Ba-Si-Mn-Fe systems, technological principles are developed for the production of a manganese-based alloy that may be used in the modification of steel with barium. This alloy is a nonstandard form of silicomanganese with 1.5–10% Ba. It may be produced from sulfate barite ore mined in Kazakhstan, by single-stage slag-free reduction in the presence of carbon. The alloy is intended for use in the manufacture of high-performance metal products.