螺栓紧固件里氏硬度现场检测误差  

Field Test Error of Leeb Hardness of Bolt Fasteners

作　　者：张健[1] 王若民[1] 李坚林[2] 甄超[2] 汤文明[3] ZHANG Jian WANG Ruomin LI Jianlin ZHEN Chao TANG Wenming(Electric Power Science Institute, Anhui Electric Power Company, State Grid, Hefei 230601, China Anhui Electric Power Company, State Grid, Hefei 230061, China School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China)

机构地区：[1]国网安徽省电力公司电力科学研究院,合肥230601 [2]国网安徽省电力公司,合肥230061 [3]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《理化检验（物理分册）》2017年第6期387-390,395,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：针对服役态In783高温合金和1Cr11Co3W3NiMoVNbNB钢螺栓紧固件,分别测试在抛光态与打磨态下螺栓端部和腰部的布氏硬度H_(BW)及由里氏硬度换算的布氏硬度H_(LD→B),并结合显微组织分析研究了该两种材料螺栓在不同测试条件下不同部位的H_(BW)与H_(LD→B)的差异。结果表明:两种材料螺栓同一部位抛光态的硬度均略大于打磨态的;同一测试条件下,螺栓端部的硬度均大于腰部的;In783高温合金螺栓同一部位打磨态测得的H_(LD→B)与抛光态测得的H_(BW)存在明显的差异,前者偏低约4%,需要在现场检测时按上述比例补偿该差值;1Cr11Co3W3NiMoVNbNB钢螺栓抛光态测得的H_(BW)与打磨态测得的H_(LD→B)关系为H_(BW)=1.06~1.10 H_(LD→B),采用里氏硬度换算获取的该低碳高合金钢布氏硬度与实测布氏硬度相比仍为负偏差。The Brinell hardness（HBW）and the Brinell hardness converted from the tested Leeb hardness（HLD→B）of as-serviced In783high-temperature alloy and 1Cr11Co3W3 NiMoVNbNB steel bolt fasteners were tested at heads and waists respectively under different conditions（polishing state and grinding state）,and the difference between HBW and HLD→B at different parts and under different conditions were studied combined with the microstructure observation.The results show that at the same test position（head or waist）of the two bolts,the hardnesses of the polished samples were higher than those of the ground ones.Under the same test condition（polishing or grinding）,the hardnesses of the bolt heads were higher than those of the waists.The HLD→B（grinding state）of the In783high-temperature alloy bolt were evidently different from the HBW（polishing state）at the same part,and the former was about 4% reduction.This error needed compensating when field test.The relationship between HBW（polishing state）and HLD→B（grinding state）of the 1Cr11Co3W3 NiMoVNbNB steel bolt was HBW =1.06-1.10 HLD→B,which indicated that for the low-carbon and high-alloy steel there was also a negative deviation compared HLD→Bto the actual tested HBW.

关 键 词：螺栓 现场检测 里氏硬度 布氏硬度 检测误差 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG115.5[金属学及工艺—金属材料]