烧结温度对铜基粉末冶金摩擦材料组织和性能的影响
Effect of Sintering Temperature on Microstructure and Properties of Cu-based Powder Metallurgy Brake Material
摘 要
在不同烧结温度下(850～1 000 ℃)制备了铜基粉末冶金摩擦材料, 研究了烧结温度对其组织、密度、硬度、抗压强度和摩擦磨损性能的影响, 由此得到了最佳的烧结温度。结果表明: 在不同烧结温度下,材料中的各组元均分布均匀, 鳞片状石墨垂直于压制方向, 并呈层状分布, SiO2以黑色大颗粒状镶嵌于铜基体内; 随着烧结温度升高, 孔隙的数量减少, 尺寸减小, 材料的硬度逐渐增大, 密度和抗拉压度均先增大后减小, 磨损量先降低后升高, 磨擦因数逐渐降低; 最佳的烧结温度为950 ℃, 此时材料的密度为5.84 g·cm-3, 抗压强度为115 MPa, 摩擦因数为0.46, 磨损量为0.063 g。
粉末冶金
铜基摩擦材料
性能
sintering temperature
powder metallurgy
Cu-based brake material
property
Abstract
Cu-based powder metallurgy brake material was prepared at different sintering temperatures (850-1 000 ℃), and the best sintering temperature was obtained by studying the effects of sintering temperature on microstructure, density, hardness, compressive strength and friction and wear properties of the brake material. The results show that all components uniformly distributed in the brake material obtained at different sintering temperatures, scaly graphite was perpendicular to pressing direction and in a layered distribution, SiO2 insetted in Cu substrate in black large particles form. With the increase of sintering temperature, the number and size of pore decreased, hardness of the material increased gradually, density and compressive strength increased and then decreased, mass loss decreased and then increased and friction coefficient decreased gradually. The optimum sintering temperature was 950 ℃, in this case, density of the material was 5.84 g·cm-3, tensile strength was 115 MPa, friction coefficient was 0.46 and mass loss was 0.063 g.
中图分类号 TF125.22 DOI 10.11973/jxgccl201601010
所属栏目 新材料 新工艺
基金项目 湖北省教育厅科学技术重点项目(D20141801); 湖北省自然科学基金资助项目(2014CFB627)
收稿日期 2015/2/20
修改稿日期 2015/10/1
网络出版日期
作者单位点击查看
备注王天国(1978-), 男, 湖北十堰人, 副教授, 博士。
引用该论文: WANG Tian-guo,QIN Qun. Effect of Sintering Temperature on Microstructure and Properties of Cu-based Powder Metallurgy Brake Material[J]. Materials for mechancial engineering, 2016, 40(1): 39～42
王天国,覃群. 烧结温度对铜基粉末冶金摩擦材料组织和性能的影响[J]. 机械工程材料, 2016, 40(1): 39～42
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【7】黄建龙,王建吉,党兴武,等.铝含量对铜基粉末冶金材料性能的影响［J］. 润滑与密封, 2013, 38 (1):56-60.
【8】姚萍屏,熊翔,李世鹏,等.合金元素锌/镍对铜基粉末冶金刹车材料的影响［J］. 润滑与密封, 2006, 31 (4) :1-4.
【9】高飞,朗剑通,符蓉,等.铝对铜基粉末冶金材料摩擦磨损性能的影响［J］. 润滑与密封, 2008,33(1) :18-21.
【10】王哗,燕青芝,张肖路.铜粉对铜基摩擦材料性能的影响［J］. 材料研究学报,2013,27(1):37-42.
【11】RAJKUMAR K, ARAVINDAN S. Microwave sintering of copper-graphite composites［J］. Journal of Materials Processing Technology,2009,209:5601-5605.
【12】XIONG X, SHENG H C, CHEN J, et al. Effects of sintering pressure and temperature on microstructure and tribological characteristic of Cu-based aircraft brake material［J］. Transactions of Nonferrous Metals Society of China,2007,17:669-675.
【13】毛凯.烧结工艺对铜基粉末冶金摩擦材料性能的影响［D］.成都: 西南交通大学, 2011.
【14】牛顿.粉末冶金铜基摩擦材料制备及摩擦学性能研究［D］.芜湖: 安徽工程大学, 2010.
【15】姚萍屏,张忠义,汪琳,等. 烧结温度对铁基粉末冶金航空刹车材料组织的影响［J］. 材料科学与工程,2007,12(3):160-166.
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