铜合金层厚度对固液连铸Cu-Pb-Sn/钢背层状复合材料组织及性能的影响  

Effect of Copper Alloy Layer Thickness on Microstructure and Properties of Solid-liquid Continuous Cast Cu-Pb-Sn/Steel Lamellar Composite

作　　者：刘守杰 彭博 接金川[1,2] 李廷举 LIU Shoujie;PENG Bo;JIE Jinchuan;LI Tingju(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116000,China;Liaoning Key Laboratory of Solidification Control and Digital Preparation Technology,Dalian 116000,China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116000 [2]辽宁省凝固控制与数字化制备技术重点实验室,辽宁大连116000

出　　处：《铸造技术》2022年第5期339-345,共7页Foundry Technology

基　　金：国家自然科学基金面上项目(52071050,51871041)。

摘　　要：通过采用固-液水平连续铸造技术制备了Cu-24Pb-2Sn/Steel(C/S)层状复合材料,研究了不同铜合金层厚度对C/S复层材料微观组织和综合性能的影响。结果表明,随着铜层厚度的增加,Cu-24Pb-2Sn(wt.%)合金中富Pb相分别呈现出粗大枝晶网状、连续网状、弥散球棒状以及异常粗化球棒状等的不同形态。同时,钢侧微观组织形貌也随铜层厚度增加产生相应变化。铜合金层厚度为6 mm时C/S层状复合材料具有最佳的微观组织和综合性能。Cu-24Pb-2Sn/Steel(C/S) lamellar composites were prepared by solid-liquid horizontal continuous casting. The effects of different copper alloy layer thickness on microstructure and comprehensive properties of C/S laminate composites were studied.The results show that with the increase of copper layer thickness, the Pb-rich phase in Cu-24Pb-2Sn(wt.%)alloy presents different morphology, such as coarse dendrite network, continuous network, disseminated sphere-like and abnormal coarsening sphere-like. Meanwhile, the microstructure of steel side changes with the increase of copper layer thickness. The C/S lamellar composites have the best microstructure and comprehensive properties when the thickness of copper alloy layer is 6 mm.

关 键 词：固-液水平连续铸造 铜钢复合 厚度 富铅相 力学性能 

分 类 号：TG249.7[金属学及工艺—铸造]