弹簧钢淬火残余应力模拟(英文)

Modeling Residual Stresses in Spring Steel Quenching

对AISI 5 16 0H弹簧钢圆柱试样在不同温度的 2 5 %水溶性聚 (亚烷基 )二醇UCONHT淬火液和Arco5 2 1淬火油中淬火产生的残余应力及畸变进行了对比性研究。试棒的直径分2 0 5 6mm (0 81inches)和13 4 5mm (0 5 3inches)两种。先用INC PHATRAN代码计算出试样随时间变化的传热系数 ,并用ABAQUS/标准有限元软件估算热处理过程中的残余应力和畸变。在试样中心放置热电偶 ,测出冷却曲线 ,根据所测的冷却曲线 ,用INC PHATRAN解决了伴随相变时的逆向热传导问题。试验了这两种淬火介质 ,力图将热处理畸变和开裂减少到最少 ,并得出了颇有价值的结论。

A comparative study of residual stresses and distortion in cylindrical samples of AISI 5160H spring steel,quenched at different bath temperatures both in 25% aqueous solutions of Polyalkilene glycol UCON quenchant HT,as well as in Arco 521 oil,is presented in this article.The probe diameters are 0.81 and 0.53 inches.The ABAQUS/Standard Finite Element Software was applied to assess residual stresses and distortion during the heat treatment,with previous calculations of the heat transfer coefficients as dependent of the temperature by means of the INC-PHATRAN Code.The inverse heat conduction problem coupled with phase transformation is solved by INC-PHATRAN knowing the cooling curves measured by thermocouples placed at the center of each sample.Valuable conclusions about the use of both quenchants,intended to minimize distortion and cracking problems during heat treating,are the results of the present work.