基于水溶性淬火液的铁路扣件Ⅱ型弹条热处理工艺  

Heat treatment of type II clip for rail fastening system based on water⁃soluble quenching liquid

作　　者：于毫勇 吕明奎 凡艳丽 刘瑞德 Yu Haoyong;LüMingkui;Fan Yanli;Liu Ruide(Tieke(Tianjin)Technology Co.,Ltd.,Tianjin 301700,China)

机构地区：[1]铁科(天津)科技有限公司,天津301700

出　　处：《金属热处理》2024年第6期91-95,共5页Heat Treatment of Metals

摘　　要：介绍了一种水溶性无机淬火液的使用特性,采用浓度为11%的淬火液对60Si2Cr钢制Ⅱ型弹条进行淬火,并通过不同温度淬火、回火处理,按照相关标准要求对弹条的淬火硬度、淬火后的显微组织、回火后残余变形、扣压力及硬度和疲劳性能进行测试与分析。结果表明,采用水溶性无机淬火液作为淬火介质,弹条热处理后的各项性能均满足技术要求,能够代替传统淬火油作为弹条的淬火冷却介质。适合弹条的热处理工艺为860℃×30 min淬火(水溶性无机淬火液)+530℃×100 min回火(水冷)。Usage characteristics of a water⁃soluble inorganic quenching liquid(quenchant)were introduced,and the type II clips made of 60Si2Cr spring steel were quenched by using of quenching liquid with a concentration of 11%at different temperatures and then tempered.The hardness and microstructure of the quenched clips,and the residual deformation,buckle pressure,hardness and fatigue property of the tempered clips were tested and analyzed in accordance with the requirements of the relevant standards.The results show that when the water⁃soluble inorganic quenching liquid is used as quenching medium,all the properties of the clips after heat treatment can meet the technical requirements,thus the quenching liquid can replace the traditional quenching oil as the quenching medium of the clips.The suitable heat treatment process for the clips is austenitized at 860℃for 30 min,quenched in the water⁃soluble inorganic quenching liquid,and then tempered at 530℃for 100 min with water cooling.

关 键 词：铁路扣件弹条 60Si2Cr钢 水溶性无机淬火液 淬火 回火 

分 类 号：TG156.1[金属学及工艺—热处理]