基于柱平面压入的洛氏硬度预测模型

Rockwell hardness prediction model based on the cylindrical flat indentation

在役结构材料的拉伸力学性能可通过压入试验获得,但针对材料硬度的压入试验获取方法仍需进一步发展。基于柱平面压入试验方法和锥压入载荷-位移模型,建立柱平面压入的材料洛氏硬度预测模型,并针对8种延性金属材料完成洛氏硬度模型预测值与传统测试结果之间的比对。结果表明,由柱平面压入洛氏硬度预测模型得到的结果与传统洛氏硬度测试结果吻合良好,两者之间的误差均在10%以内,新模型提高柱平面压入对材料性能指标的预测能力。

The tensile mechanical properties of in-service structural materials can be obtained by indentation test,the prediction method for material hardness through indentation test still needs further development.Based on the cylindrical flat indentation test method and the load vs.displacement model of cone indentation,a Rockwell hardness prediction model under cylindrical flat indentation is established.The comparison between the prediction results obtained by new model and the traditional test results was completed for eight ductile metals,and the error are all less than 10%.The new model improves the predictive power of cylindrical flat indentation for material properties.