|
|
|
| Influence of sintering process on microstructure and properties of CuSn10 oil-impregnated bearing |
| QIAN Hang-jun1,LIU Zi-li1,LIU Xi-qin1,TAO Jie1,ZHANG Hao-han1,ZOU De-hua2 |
1. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2. Changshu Huade Powder Metallurgy Co., Ltd., Changshu 215534, China |
|
|
|
|
Abstract Effects of the sintering atmosphere and sintering time on microstructure and properties of CuSn10 oil-impregnated bearing materials were investigated. The results indicate that powder particle surface is oxidized seriously when the samples are sintered at 720 ℃ for 90 min under argon atmosphere, and there are a great number of large and irregular pores. The oil content of the sample is high whereas the oil-bearing density, radial crushing strength, hardness are all low, and the wear rate is high. With the increasing of the content of H2 in the sintering atmosphere, the oxides in the powder particle surface are reduced. The pore amount and size decrease with the pore shape closing to spherical. The oil content of the samples is decreased, and the oil-bearing density, radial crushing strength, hardness of the sample are increased, the wear rate is reduced firstly and then increased. When the samples are sintered at 720 ℃ for 30 min under 50%H2＋50%Ar atmosphere (volume percent), irregular-shaped pores turn into spherical, but the pores are unevenly distributed and the size are large. When the sintering time is increased to 60 min and 90 min, the pore size is reduced. However, the pore amount and shape have no significant change when the sintering time is further increased to 120 min. With the increasing of sintering time, the oil-bearing density, mechanical properties and wear rate of samples are increased.
|
|
Received: 14 October 2014
Published: 17 June 2015
|
|
|
|
| [1] 韩凤麟. 全球烧结金属含油轴承评定[J]. 粉末冶金技术, 2008, 26(1): 65-70.[2] 相英伟,姜振春, 李雨葆. 新型锡青铜合金粉及其性能研究[J]. 钢铁研究学报, 1996, 1(8):60-65.[3] 王建强, 李国民, 赵洪波. 烧结工艺对铜基粉末冶金摩擦材料的影响[J]. 润滑与密封, 2013, 38(10): 76-79.[4] Kurgan N. Effects of sintering atmosphere on microstructure and mechanical property of sintered powder metallurgy 316L stainless steel[J]. Materials & Design, 2013, 52(12): 995-998.[5] Jun L, Ying L, Lixian L, et al. Mechanical properties and oil content of CNT reinforced porous CuSn oil bearings[J]. Composites Part B: Engineering, 2012, 43(4): 1681-1686.[6] 王聪聪, 贾成厂, 申承秀, 等. 球形化处理铜锡粉末制备 CuSn10 含油轴承[J]. 粉末冶金材料科学与工程, 2013, 18(4): 572-578.[7] 毛凯, 燕青芝, 葛昌纯, 等. 烧结气氛对铜基粉末冶金摩擦材料性能的影响[J]. 粉末冶金金工业, 2011, 21(2): 25-29.[8] Jabur A S. Effect of powder metallurgy conditions on the properties of porous bronze[J]. Powder Technology, 2013, 237: 477-483.[9] 熊洁, 汪礼敏, 庞鹏沙, 等. CuSn10 青铜粉末热压烧结行为及性能的研究[J]. 粉末冶金工业, 2008, 18(3): 18-21.[10] 刘东华, 刘咏, 刘祖铭, 等. 球磨对雾化铁基合金 14YWT 粉末烧结性能的影响[J]. 粉末冶金材料科学与工程, 2010, 15(3): 288-293.[11] 丁华东, 王永兰, 金志浩. 铜基粉末冶金含油自润滑材料研究进展[J]. 粉末冶金材料科学与工程, 1998, 3(1): 33-38.[12] Schaffer G B, Hall B J. The influence of the atmosphere on the sintering of aluminum[J]. Metallurgical and Materials Transactions A, 2002, 33(10): 79-84.[13] 王树杰, 任海萍, 樊云昌. 真空烧结工艺参数对铜粉烧结性能的影响[J]. 热加工工艺, 2009, 38(16):65-67.[14] 黄钧声, 赵欣悦. 烧结工艺对Cu-20Zn黄铜力学性能的影响[J]. 粉末冶金材料科学与工程, 2010, 15(5): 491-494.[15] 吴树森, 李勇, 毛有武, 等. 烧结工艺对铜基复合材料密度及组织的影响[J]. 特种铸造及有色合金, 2006, 25(10): 579-581.[16] Casstevens J M, Rylander H G, Eliezer Z. Friction and wear properties of two types of copper—Graphite brushes under severe sliding conditions[J]. Wear, 1978, 50(2): 371-381.[17] 安旭光, 查五生, 雷宇, 等. 烧结温度对 Al-Cu 系含油轴承压溃强度、含油率和微观形貌的影响[J]. 粉末冶金技术, 2012, 30(2): 108-111.[18] 张顺, 范景莲, 成会朝, 等. 常压H2气氛烧结 W-TiC合金的致密化行为和性能[J]. 粉末冶金材料科学与工程, 2012, 16(6): 900-905.[19] 尹延国, 杜春宽, 郑治祥, 等. 镀镍石墨粉对铜基石墨复合材料力学性能的影响[J]. 中国有色金属学报, 2007, 16(11): 216-220.[20] 韩凤麟. 烧结金属含油轴承进展[J]. 机械工程材料, 1979, 6: 27-36. |
|
|
|
2015, Vol. 25 
