一种系列冲击试验数据拟合方法  

A Data Fitting Method for Series Impact Tests

作　　者：孙永辉[1] 刘凯 商学欣 王汉奎[1] SUN Yonghui;LIU Kai;SHANG Xuexin;WANG Hankui(China Special Equipment Inspection and Research Institute,Beijing 100029,China)

机构地区：[1]中国特种设备检测研究院,北京100029

出　　处：《理化检验（物理分册）》2020年第12期22-25,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家重点研发计划项目高参数承压设备设计制造风险防控关键技术研究(2016YFC0801902)。

摘　　要：由于GB/T 229—2007中要求的系列冲击试验数据较少,系列冲击试验结果会出现拟合不合理的现象,因此提出一种考虑权重的系列冲击试验数据拟合方法。该方法以Logistics函数为基本函数,利用冲击试验数据分布特点,对韧脆转变区和上、下平台区采用不同的权重比进行拟合。采用该方法对2.25Cr1Mo0.25V钢锻件的系列冲击结果进行拟合。结果表明:该方法可以明显改善拟合效果,特别是对于材料的上、下平台区的拟合结果要优于不带权重的,采用该方法获得的拟合参数符合实际物理意义。Due to the lack of series impact tests data required in the GB/T 229—2007,the series impact test results will appear unreasonable fitting phenomenon.Therefore,a data fitting method for series of impact tests considering weight was proposed.In this method,the Logistics function was used as the basic function,and different weight coefficients were used to fit the ductile brittle transition zone and the upper and lower platform regions according to the distribution characteristics of impact test data.The series impactresultsof2.25 Cr1 Mo0.25 V steel forgings were fitted by this method.The results show that this method could significantly improve the fitting effect.The fitting results were better than those without weight especially for the upper and lower platform regions of materials.The fitting parameters obtained by this method accord with the actual physical meaning.

关 键 词：系列冲击试验 Logistics函数 韧脆转变温度 拟合权重 

分 类 号：TG115[金属学及工艺—物理冶金]