预轧-退火对Cu-7.5Sn-0.1P带材组织与力学性能的影响
Effect of pre-rolling-annealing on microstructure and mechanical properties of Cu-7.5Sn-0.1P strip
林志霖 1刘媛 2罗金宝 3张青科 2宋振纶 2谭大鹏 4巢国辉 3许赪2
作者信息
- 1. 浙江工业大学 机械工程学院,杭州 310014;中国科学院 宁波材料技术与工程研究所,海洋关键材料重点实验室,宁波 315201
- 2. 中国科学院 宁波材料技术与工程研究所,海洋关键材料重点实验室,宁波 315201
- 3. 宁波金田铜业(集团)股份有限公司,宁波 315336
- 4. 浙江工业大学 机械工程学院,杭州 310014
- 折叠
摘要
本研究对铸态Cu-7.5Sn-0.1P合金进行预轧再退火,并采用XRD、OM、SEM、EDS、EPMA和拉伸测试等方法,研究预轧变形量和退火温度对合金的微观组织和力学性能的影响.结果表明:对于预轧的Cu-7.5Sn-0.1P合金而言,预轧变形造成枝晶结构的破碎,有利于锡偏析组织在较低退火温度下的消除.与直接退火的合金相比,预轧-退火处理的合金晶粒尺寸小,强度高,还保持了良好的塑性变形能力.预轧-退火的合金经冷轧、去应力退火最终制得0.2 mm厚的成品带材,与常规工艺制备的相似厚度和成分的锡磷青铜带材相比,其强度显著提高并保持较好的塑性,其中,对应于预轧变形量为44%、退火温度为620℃的合金带材的抗拉强度与伸长率分别达到1005 MPa和19.3%.
Abstract
The cast Cu-7.5Sn-0.1P alloys were pre-rolled followed by homogenization annealing,and investigated using XRD,OM,SEM,EDS,EPMA and tensile testing,etc.The effects of pre-rolling deformation and annealing temperature on the microstructure and mechanical properties of the alloys were studied.The results show that the pre-rolling can lead to fragmentation of dendrite structure of the Cu-7.5Sn-0.1P alloy,which may promote the elimination of Sn segregation structure at lower annealing temperature.By comparison with the alloy subjected to direct annealing,the pre-rolled-annealed alloy has finer grain size,higher strength and maintains good plastic deformation capability.The final 0.2 mm thick finished strip produced by cold rolling of the pre-rolling-annealing alloy with 44%deformation is significantly higher in strength and maintains better plasticity by comparison with strips prepared by common procedures.The tensile strength and elongation for the finished strip made from the pre-rolling-annealing alloy with 44%deformation reach 1005 MPa and 19.3%,respectively.
关键词
锡磷青铜/预轧/退火/微观组织/力学性能Key words
tin-phosphor bronze/pre-rolling/homogenization annealing/microstructure/mechanical properties引用本文复制引用
基金项目
宁波市2025科技创新重大项目(2021Z032)
出版年
2024
NETL
NSTL
万方数据