新型铜合金细化添加剂对铸造铅黄铜变质处理效果影响.pdf

学兔兔 Sep．2009 铸 造 FOUNDRY ·891· VoI．58 NO．9 新型铜合金细化添加剂对铸造铅黄铜 变质处理效果的影响 刘志学，程巨强，倪自飞，胡 壶 (西安工业大学材料与化工学院，陕西西安710032) 摘要：新型细化添加剂对铸造铅黄铜变质处理的效果表明，细化效果良好，铸造铅黄铜组织由粗大的板条状变为细小 的针状或等轴状，组织均匀性提高，同时可显著提高铅黄铜的力学性能。细化效果衰退较慢，静置保温180rain后，材 料仍具有较好细化效果和力学性能。新型铜合金细化添加剂对铸件壁厚不敏感，壁厚3mm-12mm，均可获得较好的细 化效果和性能；采用新型铜合金细化添加剂变质处理可大幅度提高铅黄铜的流动性，变质处理后，铅黄铜的流动性比 未变质处理的平均提高了29．78％。 关键词：铜合金细化添加剂；铅黄铜；变质处理 中图分类号：TG146．1文献标识码：A 文章编号：1001—4977(2009)09—0891—03 Effect of New Type Copper Alloys Refinement Additive on Modification of Cast Lead Brass LIU Zhi-xue，CHENG Ju-qiang，NI Zi4ei，HU Yao (Dept．of Materials Science and Chemical Engineering，Xi’an Technological University， Xi’an 71 0032，Shaanxi，China) Abstract：A new type cast copper alloys refinement additive was developed and it has fine refinement effect on cast Iead brass．The study results show that after addition of the new type additive．the microstructure of the lead brass changed fr0m thick lath into fine acicular or equiaxial grain．and both homogeneity of microstructure and properties were improved．The fading of refinement jS slower and the cast lead brass stilI had be~er refinement effectiveness and mechanical properties after standing for 1 80 min．-f。he additive was not sensitive to wall thickness in 3 t0 1 2 mm．Meanwhile．the flow-ability of Iead brass was greatly improved and averagely enhanced by 29．78％after inoculation． Key words：copper alloys refinement additive；lead brass；inoculation treatment 铅黄铜因具有良好的力学性能和切削加工性能， 铜合金中作用及作用机理的研究较少，在生产中的应 被广泛用于卫生洁具、水暖器材、仪器仪表、液压阀