Cr3轧辊局部修复工艺的焊接热模拟分析  

Thermal simulation analysis of welding repair process for roller of material Cr3

作　　者：陈冰泉[1] 张正华[1] 黄永溪 历雷钧 吕奎清 

机构地区：[1]武汉理工大学材料加工工程系,430063 [2]中钢邢台机械轧辊有限公司修复公司,054025 [3]Department of Mechanical&Aerospace Engineering,Utah State University [4]武汉铁锚焊接材料股份有限公司,430084

出　　处：《焊接》2008年第3期39-43,共5页Welding & Joining

摘　　要：利用焊接工艺试验和热模拟试验研究了预热温度和冷速对高碳含量的轧辊材料Cr3钢焊接性的影响。通过金相分析、X射线衍射分析及温度-体积变化关系的分析,研究了预热温度和冷速影响Cr3钢焊接性的机理,确定了Cr3钢在焊接冷速下的组织,得到了冷却速度与焊后组织、加热区最大收缩量和焊接残余应力的关系。研究表明,控制焊接时的冷却速度是保证这类轧辊材料堆焊修复质量的关键。By means of welding experiments and Gleeble thermal simulation,the influences of preheating temperature,cooling rate,and high carbon content on weldability of a roller material Cr3 steel were studied.and its influencing mechanisms were also invesgated with metallographic analysis,XRD analysis and Temperature-Volume analysis.The microstructures of Cr3 at various welding cooling rates were identified.The relationship between cooling rate and microstructure,cooling rate and the maximum shrinkage,and that between the maximum shrinkage in local heating area and welding residual stresses were obtained.Results showed that control of the cooling rate is the key to the repairing quality for the roller material.

关 键 词：轧辊材料Cr3钢 局部修复 热模拟 

分 类 号：TG406[金属学及工艺—焊接]