Regresion analyses among HB,HV,HRC and HS are carried out,the formaulas of the regression relations between HRC and HB,HRC,HV,HRC and HV,HB and HS are set up.

• 进行了布、洛、维、肖氏硬度之间的回归分析；建立了洛氏硬度与布氏、维氏、肖氏硬度之间；以及布氏硬度与维氏、肖氏硬度之间的回归关系式.