TITLE:
Cause Analysis of Crack Formation in HRB400 Screw-Thread Steel
AUTHORS:
Pengbiao Wang, Qichun Peng, Sanxiang Lei, Youhua Wang
KEYWORDS:
HRB400 Screw-Thread Steel, Crack, Inclusion, Cause Analysis
JOURNAL NAME:
International Journal of Nonferrous Metallurgy,
Vol.5 No.2,
April
19,
2016
ABSTRACT: The
analysis of the crack on the HRB400 screw-thread steel surface has been carried
out by means of metallographic microscope, scanning electron microscope and EDAX.
It is shown that the type of inclusions in the crack steel samples is mainly class
B oxide, C silicate, and the inclusion size of the majority below 10 μm, and a small number of large inclusions are observed. The content of oxygen in
the steel is high, and the carbon segregation is the main reason of the crack formation
of HRB400 screw-thread steel. The measures to improve the crack formation of HRB400
screw-thread steel are put forward, which provides a powerful basis for the practical
production.