Abstract

Presently the additive technologies in manufacturing are widely developed in all industrialized countries. Replacing the traditional technology of casting and machining with additive technologies, one can significantly reduce material consumption and labor costs. They also allow obtaining products with desired properties. The most promising for manufacturing large-sized products is the additive technology of high-speed direct laser deposition. Using this technology allows to create complex parts and construction to one technological operation without using addition equipment and tools. This technology allows decreasing of consumption of raw materials and decrease amount of waste. Equipment for realization of DLD technology is universal and based on module design principle. DLD is based on layer-by-layer deposition and melting of powder by laser beam from using a sliced 3D computer-aided design (CAD) file. The materials used are powders based on Fe, Ni, and Ti. This chapter presents the results of machine design and research HS DLD technology from various materials.

Highlights

  • New manufacturing technologies are incorporated into most areas of engineering: aircraft industry, shipbuilding, medicine, engine construction, etc

  • Selective laser melting (SLM) technology has already been implemented in production in many countries of the world [6, 7]

  • A linear analysis of the stability of the process of direct laser deposition process allows us to conclude that stable growth is possible only at the position of the grown surface above the waist of the gas-powder jet, and the necessary condition for stability is the fulfillment of inequality Eq (15)

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Summary

Introduction

New manufacturing technologies are incorporated into most areas of engineering: aircraft industry, shipbuilding, medicine, engine construction, etc. The intensive development of additive technologies in recent years makes it possible to improve the methods of manufacturing and processing products [1–5]. They allow saving expensive raw materials in comparison with classical production methods, during which up to 90% of the material can be removed. The jet can be as coaxial and as non-coaxial to focused laser beam, which provides heating and partial melting of the powder and heating the substrate This technology allows to include a mixture of powders into the gas-powder jet and to change the composition of powders during the process. The main feature of the developed equipment is a modular assembly type, which allows to modernize the installation at the customer’s request This is the first Russian technology and equipment for the implementation of additive production. The research results showed that developed technology of direct laser deposition can replace the currently used technologies, providing multiple increase productivity and material savings, in spite of its technological complexity

Theory of high-speed direct laser deposition
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Technology and equipment of direct laser deposition process
Structure and properties of manufactured products
Findings
Conclusions
Full Text
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