局部感应钎焊锯片基体的热变形分析  

Analysis of thermal deformation of substrate of local induction brazed saw blade

作　　者：侯超鹏 李奇林 丁凯 雷卫宁 任维彬 韩锦锦 HOU Chaopeng;LI Qilin;DING Kai;LEI Weining;REN Weibin;HAN Jinjin(School of Mechanical Engineering,Jiangsu Institute of Technology,Changzhou 213001,Jiangsu,China)

机构地区：[1]江苏理工学院机械工程学院,江苏常州213001

出　　处：《金刚石与磨料磨具工程》2023年第2期241-249,共9页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(51905234);江苏省高校自然科学研究重大项目(22KJA460004);江苏理工学院研究生实践创新计划项目(XSJCX21_19)。

摘　　要：针对钎焊锯片基体在高温条件下的热变形问题,在有限元软件中对局部感应钎焊锯片基体的温度、组织以及应力应变场进行分析,研究影响锯片基体变形的因素。结果显示:锯片基体发生的相变主要分布在钎焊工作面上,冷却至室温后主要得到铁素体、珠光体、贝氏体3种组织。当热源的扫描速度增大,基体的变形量以及残余应力都随之增大。当扫描速度从0.25 mm/s增至2.00 mm/s时,相变层厚度从5.8 mm降至4.7 mm,最大变形量从0.41 mm增至0.82 mm,且残余应力从482 MPa增至667 MPa。试验与仿真结果基本一致。In order to solve the problem of thermal deformation of brazed saw blade substrate under high temperature,the temperature,the microstructure and the stress-strain field of local induction brazed saw blade substrate were analyzed with the finite element software,and the factors affecting the deformation of saw blade substrate were studied.The results show that the phase transformation of the saw blade substrate is mainly distributed on the brazing working surface.After cooling to room temperature,three microstructures including ferrite,pearlite,bainite and trace martensite are obtained.When the scanning speed of the heat source increases,the deformation and the residual stress of the substrate increase.When the scanning speed increases from 0.25 mm/s to 2.00 mm/s,the thickness of the phase change layer decreases from 5.8 mm to 4.7 mm,the maximum deformation increases from 0.41 mm to 0.82 mm,and the residual stress increases from 482 MPa to 667 MPa.The test results are basically consistent with the simulation results.

关 键 词：局部感应钎焊 相变 热变形 钎焊温度 锯片 

分 类 号：TG74[金属学及工艺—刀具与模具] TQ164[化学工程—高温制品工业]