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Comparison of Leeb Hardness and Brinell Hardness of P92 Steel under Different Heat Treatment Conditions
Pages: 612-614,648
Year: Issue:  9
Journal: Physical Testing and Chemical Analysis Part A:Physical Testing

Keyword:  P92 steelLeeb hardnessBrinell hardnessmicrostructuremartensite;
Abstract: 从规格为ID349 mm×94.5 mm的P92钢主蒸汽管道上取样,进行了不同工艺的淬火+回火热处理,然后对不同热处理状态下的P92钢分别用便携式里氏硬度计和台式布洛维硬度计进行了硬度测试,研究了里氏硬度与布氏硬度之间的关系,同时用光学显微镜对P92钢的显微组织进行了观察.结果表明:里氏硬度计测得的布氏硬度换算值(HBHLD)及依据GB/T 17394-1998的查表值均低于试样实测的布氏硬度值,且不同型号的里氏硬度计测得的结果差别较大;P92钢在810℃回火后仍保留马氏体的形态特征.
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