激光表面淬火对H13钢显微组织及性能的影响  

Effects of Laser Surface Quenching on Microstructure and Properties of H13 Steel

作　　者：张亚龙[1] 徐新成[2] 杨向东[1] 赵中华[2] 

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]上海工程技术大学工程实训中心,上海201620

出　　处：《热加工工艺》2014年第8期153-155,160,共4页Hot Working Technology

摘　　要：对经激光表面淬火的H13模具钢的显微组织及性能进行了观察分析,发现其显微组织和性能基本呈梯度变化;强化层晶粒明显细化,并出现孪晶亚晶组织。强化层深度可达1.0 mm;硬度峰值出现在次表层;平均显微硬度可提高25%左右。高温耐磨性和耐腐蚀性显著提高。激光表面淬火工艺参数具有一定的范围限制。The microstructure and properties of H13 die steel after laser surface quenching were analyzed. The microstructure and properties in the hardening region have a change of gradient. The grains in the hardening layer refine obviously and the twin crystal and sub-grain organization appeare. The maximum depth of the hardening layer can reach 1.0 mm. The peak hardness appears in the sub-surface; the average microhardness can be improved by 25%. The high temperature wear resistance and corrosion resistance can be improved significantly. The process parameters of laser surface quenching also have some certain limits.

关 键 词：H13模具钢 激光表面淬火 显微组织 材料性能 

分 类 号：TG156.33[金属学及工艺—热处理]