根据压痕深度计算布氏硬度值的方法初探

A Preliminary Method for Calculating Brinell Hardness Value Based on the Depth of Indentation

指出了目前在许多关于硬度试验方法的标准和经典著作中都没有区分"压痕深度"和"装有压头的压杆位移"这两个不同的长度量。把装有压头的压杆位移当作压痕深度,对于洛氏硬度试验不会造成错误的结果;但把装有压头的压杆位移当作压痕深度计算压痕直径和布氏硬度值,则会造成明显的错误。提出了采用从压杆最大位移中扣除硬度计弹性变形得到的压痕深度计算压痕直径和布氏硬度值的方法,试验结果表明:这种方法计算得到的布氏硬度试验结果与采用光学系统测量压痕直径方法得到的结果相吻合;该方法兼具布氏硬度试验和快速布氏硬度试验的优点,可以既快速又准确地得到布氏硬度试验结果。

It is pointed out that two different length amounts of‘depth of indentation’and‘displacement of the bar with indenter’were not discriminated in a lot of standards and classics on hardness test method.Deeming the displacement of the bar with indenter as the depth of indentation,will not cause mistake results for Rockwell hardness test.However,deeming the displacement of the bar with indenter as the depth of indentation to calculate diameter of indentation and Brinell hardness value,will cause a remarkable mistake.The method to calculate the diameter of indentation and Brinell hardness value with the displacement of the bar subtracted the elastic deformation of the equipment was proposed.The test results show that the Brinell hardness test results by the new method are conformance with the results by measuring the diameter of indentation with a optical measurement system.The method has the advantages of the Brinell hardness test and the fast Brinell hardness test,and can obtain the Brinell hardness test results quickly and accurately.