小口径P91钢管道硬度测试结果偏低原因  

Reasons for low hardness test results of small diameter P91 steel pipeline

作　　者：王飞 杨超[2] 张立代 倪杰凯 石仁强 刘德明 WANG Fei;YANG Chao;ZHANG Lidai;NI Jiekai;SHI Renqiang;LIU Deming(Jiangsu Zhenjiang Gas Thermal Power Co.,Ltd.,Zhenjiang 212028,China;Jiangsu Frontier Electric Technology Co.,Ltd.,Nanjing 211102,China;Zhenjiang Xinhuadian Engineering Quality Inspection Co.,Ltd.,Zhenjiang 212006,China)

机构地区：[1]江苏镇江燃气热电有限公司,镇江212028 [2]江苏方天电力技术有限公司,南京211102 [3]镇江新华电工程质量检测有限责任公司,镇江212006

出　　处：《理化检验(物理分册)》2025年第3期83-85,共3页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：在某P91钢管的安装前检测过程中,便携式里氏硬度计测试结果较低,采用化学成分分析、硬度测试、金相检验等方法分析了硬度偏低的原因。结果表明:该钢管的显微组织和硬度均不符合标准要求,属于不合格产品;试样曲率和壁厚太小,测试时未使用支撑环,且硬度换算方式不正确,导致便携式里氏硬度计测试结果出现差异。In the process of pre-installation inspection of a P91 steel pipe,the test results of the portable Leeb hardness tester were low.The reasons for the low hardness were analyzed by chemical composition analysis,hardness test,metallographic examination and other methods.The results show that the microstructure and hardness of the steel pipe did not meet the standard requirements and were unqualified products.The curvature and wall thickness of the sample were too small,the support ring was not used during the test,and the hardness conversion method was not correct,resulting in differences in the test results of the portable Leeb hardness tester.

关 键 词：小口径管道 低硬度 硬度换算 硬度测试偏差 显微组织 

分 类 号：TG115.2[金属学及工艺—物理冶金] TB31[金属学及工艺—金属学]