Analysis research on microstructure and inclusions of 42CrMoV bolt

WANG Liu-tao; WANG Hai-chuan; XU Fei; LI Dian-kai; FAN Ding-dong; ZHANG Qing-an; WANG Kai-zhong; SUN Wei

doi:10.13374/j.issn2095-9389.2016.s1.023

Volume 38 Issue S1

Jul. 2021

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Article Navigation > Chinese Journal of Engineering > 2016 > 38(S1): 134-138

WANG Liu-tao, WANG Hai-chuan, XU Fei, LI Dian-kai, FAN Ding-dong, ZHANG Qing-an, WANG Kai-zhong, SUN Wei. Analysis research on microstructure and inclusions of 42CrMoV bolt[J]. Chinese Journal of Engineering, 2016, 38(S1): 134-138. doi: 10.13374/j.issn2095-9389.2016.s1.023

Citation:

WANG Liu-tao, WANG Hai-chuan, XU Fei, LI Dian-kai, FAN Ding-dong, ZHANG Qing-an, WANG Kai-zhong, SUN Wei. Analysis research on microstructure and inclusions of 42CrMoV bolt[J]. Chinese Journal of Engineering, 2016, 38(S1): 134-138. doi: 10.13374/j.issn2095-9389.2016.s1.023

Citation:

WANG Liu-tao, WANG Hai-chuan, XU Fei, LI Dian-kai, FAN Ding-dong, ZHANG Qing-an, WANG Kai-zhong, SUN Wei. Analysis research on microstructure and inclusions of 42CrMoV bolt[J]. Chinese Journal of Engineering, 2016, 38(S1): 134-138. doi: 10.13374/j.issn2095-9389.2016.s1.023

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Analysis research on microstructure and inclusions of 42CrMoV bolt

doi: 10.13374/j.issn2095-9389.2016.s1.023

1. Scott Special Steel Company, Masteel Co. Ltd., Ma'anshan 243001, China;
2. School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan 243002, China;
3. School of Material Science and Engineering, Anhui University of Technology, Ma'anshan 243002, China;
4. Special Steel Company, Masteel Co. Ltd., Ma'anshan 243001, China

Received Date: 2016-01-12
Available Online: 2021-07-29

Abstract

Abstract

The microscopic structures and inclusion in 42CrMoV bolt were investigated by SEM,STEM and software ASPEX. The results show that the matrix structure of 42CrMoV bolt is tempered sorbite,but still retains the original morphology of martensite. Carbides precipitate and arrange orderly in intracrystalline and lath boundaries,and the amount of precipitated carbides in grain boundaries are more than that in intracrystalline. Besides,the micro-hardness HV0.2 is 330 and the grain size(level) of austenitic is 9. The Mn S and aluminate are the main inclusion types in 42CrMoV bolt,and the size of inclusions are mostly less than 5 μm,the level of A,B,C,D and Ds inclusion was basically less than or equal to Level 0.5.
- high strength bolt,
- microscopic structure,
- grain size,
- inclusion