无机淬火液在螺旋道钉热处理工艺的应用  

Application of Inorganic Quenching Liquid in Heat Treatment of Screw Spike

作　　者：吕明奎 刘瑞德 张保耀 夏添 隗永旺 LV Mingkui;LIU Ruide;ZHANG Baoyao;XIA Tian;WEI Yongwang(Tieke(Tianjin)Technology Co.LTD.,Tianjin 301700,China;Beijing Tieke Shougang Technology Co.Ltd.,Beijing 102206,China)

机构地区：[1]铁科(天津)科技有限公司,天津301700 [2]北京铁科首钢轨道技术股份有限公司,北京102206

出　　处：《科技和产业》2024年第14期227-230,共4页Science Technology and Industry

摘　　要：采用水溶性无机淬火液作为螺旋道钉淬火时的淬火介质,对螺旋道钉分别进行了淬火、不同回火时间和不同回火温度的回火,分析了不同工艺处理后螺旋道钉的显微组织、硬度和最小实物拉力。结果表明,在淬火温度850℃、保温时间80min条件下淬火,螺旋道钉表面未发现淬火裂纹,整体淬透性良好、硬度和淬火显微组织无明显差异;同回火温度下,随着回火时间的增加,螺旋道钉硬度降低,最小实物拉力降低;同回火时间下,随着回火温度的增加,螺旋道钉硬度降低,最小实物拉力降低;采用水溶性无机淬火液(浓度12%)作为淬火介质时,对螺旋道钉而言,合适的热处理工艺为淬火温度850℃、保温时间80min、回火温度460℃、回火时间120min。The water-soluble inorganic quenching liquid was used as the quenching medium of the spiral spike.The spiral spike was quenched,tempered at different tempering time and temperature respectively.The microstructure,hardness and minimum physical tension of the spiral spike after different processing were analyzed.The results show that no quenching crack is found on the surface of spiral spike under the condition of quenching temperature 850℃and holding time 80min,and the overall hardenability is good,and the hardness and quenching microstructure have no obvious difference.At the same tempering temperature,with the increase of tempering time,the hardness of spiral spike decreases,and the minimum physical tension decreases.Under the same tempering time,with the increase of tempering temperature,the hardness of spiral spike decreases,and the minimum physical tension decreases.When water-soluble inorganic quenching liquid(concentration12%)is used as the quenching medium,the appropriate heat treatment process for spiral spike is quenching temperature 850℃,holding time 80min,tempering temperature 460℃,and tempering time 120min.

关 键 词：淬火液 螺旋道钉 热处理 显微组织 硬度 最小实物拉力 

分 类 号：TG156.1[金属学及工艺—热处理] U215[金属学及工艺—金属学]