文档介绍：热处理对 CuNi2Si合金组织和性能的影响
张文芹
(太原晋西春雷铜业有限公司,山西太原 030008)
摘要:研究了不同预冷变形条件下时效温度及时间对
果表明:合金在880℃× h固溶,经不同预冷变形后时效,具有较强的时效强化特性;同时
预冷变形能够促进时效过程中第二相的析出,并具有晶界析出倾向;当预冷变形达 40%,
500℃×1 h时效,合金布氏硬度(HB)达193,抗拉强度(Rm)达765 MPa,伸长率达11%,与未
进行预冷变形的合金相比,可获得较高的硬度、
断口为韧性断裂,形貌特征为沿晶型韧窝,这与析出相具有晶界析出倾向的特性一致.
关键词:CuNi2Si合金;热处理;冷变形;时效;性能;组织
中图分类号:+1 文献标志码:A
Effects of Heat Treatment on Microstructure and Properties of CuNi2Si Alloy
ZHANG Wenqin
(Taiyuan Jinxi Chunlei Copper Co.,Ltd.,Taiyuan 030008,China)
Abstract:The paper studied the effects of aging temperature and time on alloy CuNi2Si
microstructure and properties after cold results show that alloys soluting at
880℃× h,aging after different cold deformation ratios,manifested strong age-
hardening properties;at the same time,cold pre-deformation can promote the secondary-
phase precipitation in the aging process,with the tendency of grain boundaries
hardness achieved193(HB)and tensile strength(Rm)reached765 MPa
with 11%of elongation when the alloy with 40%cold deformation aged at 500℃×1 h.
Besides high hardness,strength and overall performance of the alloy -
treated tensile fracture surface of alloys is characterized by ductile fracture and crystal-
shaped dimples,plies with the grain boundaries characteristic of pre