淬火钢等温回火硬度值的非线性拟合函数的研究  

Nonlinear Fitting Function of Quenched Steel Austempering Hardness and Application

作　　者：郭从盛[1] 龙姝明[1] 冯小明[1] 

机构地区：[1]陕西理工学院材料科学与工程学院,陕西汉中723003

出　　处：《铸造技术》2007年第2期274-276,共3页Foundry Technology

摘　　要：利用等温回火实验,采集了淬火钢在不同条件下回火时的硬度数据。采用非线性回归分析方法,得到淬火钢的回火硬度与回火温度和回火时间的双指数函数关系式:H(T,t)=a(T)e-b(T)t+c(T)e-d(T)t。该关系式不仅可以很好地解释淬火钢回火时硬度下降规律的物理意义,利用该关系式还能方便地预测淬火钢的回火硬度,简单、快捷地计算出多组可供选择的回火工艺参数,以利于回火工艺的优化设计。The hardness data of quenched steel under different conditions were collected utilizing austempering tests. The double exponential distribution functional relationship between tempering hardness and tempering temperature and time was obtained using nonlinear regression method： H（T,t）=a（T）e^-b（T）t＋c（T）e^-d（T）t. The relationship can not only interpret the physical significance of the tempering hardness decrease law of quenched steel very well, but predict tempering harness conveniently and calculate a series of tempering parameters simply and quickly as well, thus favoring the optimization design of tempering process.

关 键 词：淬火钢 等温回火 线性拟合 回火工艺 

分 类 号：TG156.5[金属学及工艺—热处理]