30CrMnSiA鋼吊鉤等溫淬火工藝的研究

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Abstract：Aiming at the problem that the mechanical properties of 30CrMnSiA steel hooks after isothermal quenching are not up to the standards，the influence of isothermal temperature on the metallgraphic structure and mechanical properties of the material wasanalyzed by processtests.Theresults show that the optimum isothermal quenching temperature of 30CrMnSiA steel hooks is . After isothermal quenching，the complex phase structure of bainite and martensite can be obtained. With the increase of isothermal temperature，the content of upper bainite increases gradually，and the hardnessand strength values decrease， Simultaneously maintaining good elongation and cross-sectional shrinkage.

Keywords：3oCrMnSiA steel;isothermal quenching;strength

1序言

30CrMnSiA屬中碳調質鋼，具有較好的力學性能和加工性能，在淬火與高溫回火狀態(tài)下具有較高的強度和足夠的韌性，是飛機制造業(yè)中使用最廣泛的一種調質鋼[。（剩余2828字）