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
陈宁宁 1张国伟 1张有贵 1任晓燕2
作者信息
- 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
- 折叠
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11.95 μm,剪切强度达到最高值247.2 MPa,力学性能理想.
Abstract
In order to achieve a high-strength combination of copper/steel bimetals and avoid problems such as inter-face 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 the α-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 the α-Cu,where the inter-diffusion distance of copper/steel bimetallic atomic is increased to 11.95 μm,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Key words
Quenching/Pb Particles/Grain Boundary/Mechanical Properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据