淬火对Cu-Pb-Sn/Fe双金属组织和性能的影响  

Effects of Quenching on Microstructure and Properties of Cu-Pb-Sn/Fe Bimetals

作　　者：陈宁宁 张国伟[1] 张有贵 任晓燕 Chen Ningning;Zhang Guowei;Zhang Yougui;Ren Xiaoyan(School of Materials Science and Engineering,North University of China,Taiyuan 030051;Department of Mechanical Engineering,Taiyuan Institute of Technology,Taiyuan 030013)

机构地区：[1]中北大学材料科学与工程学院,太原030051 [2]太原工业学院机械工程系,太原030013

出　　处：《特种铸造及有色合金》2024年第3期333-338,共6页Special Casting & Nonferrous Alloys

摘　　要：为实现铜/钢双金属材料高强度结合,避免界面开裂、铜层脱落等问题,将传统固-液复合铸造与淬火工艺相结合,研究了淬火对铜/钢双金属界面微观组织及力学性能的影响。结果表明,淬火工艺加快了冷却速率,α-Cu相枝晶得到细化。当淬火温度为800℃时,Pb颗粒细小且分布均匀,界面处铜侧细晶区晶粒尺寸减小,增加了α-Cu的晶界,从而使铜/钢双金属原子互扩散距离增大至11.95μm,剪切强度达到最高值247.2 MPa,力学性能理想。In order to achieve a high-strength combination of copper/steel bimetals and avoid problems such as interface cracking and copper layer detachment,the traditional solid-liquid composite casting was combined with the quenching process to investigate the effect of quenching on microstructure and mechanical properties of the copper/steel bimetallic interface.The results indicate that the quenching process accelerates the cooling rate,and theα-Cu phase dendrites are refined.With the quenching temperature of 800℃,Pb particles are refined and uniformly distributed with the decrease of grain size on the copper side of fine grain region,increasing the grain boundaries of theα-Cu,where the inter-diffusion distance of copper/steel bimetallic atomic is increased to 11.95μm,and the shear strength reaches the highest value of 247.2 MPa,obtaining desirable mechanical properties.

关 键 词：淬火 Pb颗粒 晶界 力学性能 

分 类 号：TG156.3[金属学及工艺—热处理] TG146.11[金属学及工艺—金属学]