Abstract
The current development of steel industry has constraints on the availability of raw materials, so we have developed local raw materials that are lateritic steels as a high potential for alternative manufacturing of steel. This research was conducted to understand the characteristics of lateritic steel through hot forging process by the mechanical and microstructure behaviour. The research methodology was chained by variety of preheating temperature of 800; 1000; 1200 °C and forging force from 0 until 1000 kilonewton. In case of hot forging values was obtained the impact and hardness properties also microstructure that compared with as-cast steels. The results of impact strength increased by 81.83% at the temperature of 1200 °C and the hardness increased by 4.99% at 1000 °C, for the microstructure analysis was produced the ferrite and pearlite phases with the fine grains. The chemical composition of steel is classified in low carbon steel included in lateritic steel it contains low alloy 1.78 Ni and 0.553 Cr %wt.
Highlights
In the development of national independence that is the need of steel raw materials, it needs an alternative resource of steel making that is from lateritic nickel ore
The lateritic steel is developed from converting process from Nickel Pig Iron (NPI) 1-2% nickel content and carbon content above 2% using oxygen gas blowing to decreased the carbon content in the steel with low nickel content of 0-3, 0% and Cr by 0-2.5%[1]
The lateritic cast steel was simulated size reduction by hot forging at highest temperature of 1200 °C and force load of 1000 kN to determine the maximum reduction in the material
Summary
In the development of national independence that is the need of steel raw materials, it needs an alternative resource of steel making that is from lateritic nickel ore. The lateritic steel is developed from converting process from Nickel Pig Iron (NPI) 1-2% nickel content and carbon content above 2% using oxygen gas blowing to decreased the carbon content in the steel with low nickel content of 0-3, 0% and Cr by 0-2.5%[1]. Previous research about lateritic steel was conducted that the excessive hot forging process on AISI 4340 steel can lead to initiation of cracks due to the reduction of size too large and the inadequate properties and ductility[3]. The cooling rate after the forging process strongly affects to formation of microstructure, fraction volume phase transformation that needs to be controlled[4]. In this research will be investigated the impact value, hardness value, and characteristics microstructure between phase and grain growth through hot forging method by a recrystallization phenomenon
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
