微观组织对机械/热复合载荷作用下碳素钢内部应力状态的影响  

Influence of Microstructure on Stress Distribution of Carbon Steel under Mechanical and Thermal Loadings

作　　者：刘智[1] 杨林[1] 张丰利 车磊[3] 

机构地区：[1]大连工业大学机械工程与自动化学院,辽宁大连116034 [2]大连公交客运集团金马运营分公司,辽宁大连116034 [3]金泽大学自然科学研究科,日本金泽920-1192

出　　处：《热加工工艺》2008年第12期53-57,共5页Hot Working Technology

摘　　要：为了探讨渗碳体相的组织形态对碳素钢的内部应力状态的影响,在充分考虑材料的微观组织特征的基础上建立了有限元的计算模型,并使用该模型具体分析了在机械/热复合载荷作用下球状渗碳体的体积含量及粒径尺寸对碳素钢内部应力状态的影响。为了验证计算模型的可靠性,使用X射线实际测量了碳素钢的内部应力状态,并把测量的结果与有限元分析的结果进行了对比。对比结果表明,有限元分析的结果和试验结果十分吻合,进而验证了计算模型的可靠性。The internal stress state of steel under thermal or mechanical loading is strongly affected by the amount and morphology of the cementite phase. A computational model which applies the finite element method at the microscale was used in present study. The effects of volume fraction and particle size of the spherical cementite on the internal stress states in carbon steels under the mechanical and thermal loadings were investigated. To verify the reliability of the computational simulation, the residual stress states in the constituent phases were measured by means of X-ray stress diffraction technique. The comparing results show that the computational simulations fit well with the experimental data, and the microstructure-based model is validated.

关 键 词：X射线 应力 仿真 微观组织 渗碳体 碳素钢 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]