Open AccessStudy of the nature of destruction of castings made of 35HGSL steel after a long service life
Author(s) -
M. L. Skryabin,
M. S. Poyarkov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/862/3/032088
Subject(s) - metallurgy , bainite , foundry , materials science , ferrite (magnet) , grain boundary , service life , microstructure , alloy , austenite , composite material
Today, castings of their alloy steels are an integral part of modern foundry production. In the process of obtaining castings, any defects inevitably appear. This paper deals with the issues of stone-like destruction of castings made of 35HGSL steel after a long service life. The paper compares the macro-and microstructures of the rock-like fracture and based on the analysis revealed that its causes are large grain and the presence of impurities in steel in the form of sulfides or nitrides, which are located on the grain boundaries and weaken them. The influence of ferrite layers around bainite grains on the presence of the studied defect was also revealed.