30CrMnSiA钢吊钩等温淬火工艺的研究

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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属中碳调质钢，具有较好的力学性能和加工性能，在淬火与高温回火状态下具有较高的强度和足够的韧性，是飞机制造业中使用最广泛的一种调质钢[。（剩余2828字）