Quenching crack analysis of 42CrMoS4 steel



کتابخانه الکترونیکی دیتا ساینس

شناسه: Article-111316

عنوان: Quenching crack analysis of 42CrMoS4 steel

لینک: http://en.cnki.com.cn/Article_en/CJFDTOTAL-GTYJ201404017.htm

زبان: چینی

قیمت: ۲۱۰۰ تومان (۱۰ درصد تخفیف اعضاء ویژه)

To investigate the reasons of quenching crack of 42CrMoS4 steel bar,microstructures and composition of the bar samples are analyzed by means of SEM,metallographic microscope and electron microprobe.Results show that the crack stemmed from the steel bar core,which was related to abnormal martensites and aggregated MnS. The abnormal martensites were caused by band segregation,expecially the serious composition segregation of Cr,Mo.Martensite,pearlite,ferrite were coexisted in the core,which led to the crack of martensite zone,while aggregated MnS accelerated the crack growth.Eventually,the steel bar was completely cracked.

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