回火对Cr-Ni-Mn不锈钢丝微观组织和性能的影响  

Effect of Tempering on Microstructure and Property of Cr-Ni-Mn Stainless Steel Wire

作　　者：杨建春[1,2] 刘国权[1] 董秀萍[3] 白鸿柏[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]军械工程学院火炮工程系,河北石家庄050003 [3]北京工商大学机械工程学院,北京100048

出　　处：《热加工工艺》2011年第8期175-177,180,共4页Hot Working Technology

基　　金：装备预先研究资助项目(51312040405);国家自然基金资助项目(50775220)

摘　　要：用等应变应力对比法分析了回火温度对金属橡胶材料(构件)力学性能的影响,用SEM观察微观组织形貌。结果表明:冷拔态不锈钢丝在450℃以下回火消除残余变形应力,并伴有ε碳化物析出,构件强度波动;500℃以上回火发生恢复再结晶,内部微观组织由形变α'马氏体转变为α铁素体,伴有孔洞缩小和溢出,构件强度降低,而450～500℃回火,ε碳化物析出达到平衡,微小裂纹焊合,且未发生恢复再结晶,构件有较高的强度。综合分析,450～500℃是Cr-Ni-Mn不锈钢丝制备金属橡胶材料(构件)较为理想的回火温度。The influences of tempering temperature on mechanical properties of the metal rubber components were studied by the comparisons way of stress at equal strain.The microstructure of cool-drawing stainless steel wire was observed after tempering by SEM.The results show that the residual stress of cool-drawing stainless steel wire,which is caused by the deformation,is relieved,and ε carbonides are precipitated when tempered at 450 ℃,the strength of the components is undulate;recovery and recrystallization occurrs at 500 ℃,the inner microstructure transforms from α＇ martensite into α ferrite,and the inner micro-cavity shrinks and spills out,the strength of the components decreases;however,when tempered at 450 ℃～500 ℃,the precipitation of ε carbonides reaches the balance,the micro-cracks seam,but there is no recovery and recrystallization,the strength of the components is higher.In summary,tempering at 450 ℃～500 ℃ is suitable for the metal rubber material（components） which is made of cool-drawing Cr-Ni-Mn stainless steel wire.

关 键 词：金属橡胶材料 回火温度 不锈钢丝 微观组织 力学性能 

分 类 号：TG156.5[金属学及工艺—热处理]