1Cr15Ni4Mo3N钢螺栓的断裂分析  

Analysis on 1Cr15Ni4Mo3N Steel Bolt Breaking

作　　者：张雅 方军 刘金龙 吕韦 王恩鹏 ZHANG Ya;FANG Jun;LIU Jinlong;LYU Wei;WANG Enpeng(Anhui Tianhang Mechanical and electrical Co.,Ltd.,Wuhu 241000,Anhui China)

机构地区：[1]安徽天航机电有限公司,安徽芜湖241000

出　　处：《热处理》2020年第5期53-56,共4页Heat Treatment

摘　　要：某厂1Cr15Ni4Mo3N钢螺栓服役过程中发生断裂,断口晶粒较为粗大,抗拉强度较高。曾对该螺栓断裂的原因进行过分析,并断定为沿晶脆性断裂,且与氢脆有关。为揭示螺栓断裂的真正原因,对Cr15Ni4Mo3N钢进行了从1 070、1 100、1 130、1 160和1 190℃淬火及于1 070℃分别保温50、100和150 min后淬火,随后检测了钢的晶粒尺寸等显微组织、硬度、抗拉强度,以及热处理前、后的含氢量。结果表明:螺栓的断裂并非热处理工程中的吸氢所致。A 1 Cr15 Ni4 Mo3 N steel bolt broken in service in a factory,and exhibited the fracture where grains were relatively coarse and the higher tensile strength.The reason why the bolt broken has been analyzed previously,and it was concluded that the bolt was a intercrystalline breaking which was related to hydrogen brittleness.To reveal the true cause of the bolt breaking,the 1 Cr15 Ni4 Mo3 N steel was quenched from 1 070,1 100,1 130,1 160,and1 190℃ as well as heated at 1 070℃ for 50,100,and 150 min then quenched,respectively.Subsequently,the steel was tested for microstructure,including grain size,hardness and tensile strength,as well as for hydrogen content before and after heat treating.The results indicated that the bolt breaking was not stemmed from hydrogen absorption during the heat treatment.

关 键 词：1Cr15Ni4Mo3N钢 氢脆 粗大晶粒 淬火 

分 类 号：TG142[一般工业技术—材料科学与工程]