金属学报  2006, Vol. 42 Issue (11): 1212-1216

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粉末冶金法制备NiCr基高温自润滑合金PM304涂层

丁春华1) 王亚平2) 周敬恩1)

1) 西安交通大学金属材料强度国家重点实验室; 西安 710049 2) 西安交通大学理学院; 西安 710049

A NiCr--Based High Temperature Self Lubricating Coating PM304 Prepared by Powder Metallurgy

DING Chunhua1); WANG Yaping2);ZHOU Jing'en1)

1) State Key Laboratory for Mechanical Behavior of Materials; Xi'an Jiaotong University; Xi'an 710049

丁春华; 王亚平; 周敬恩 . 粉末冶金法制备NiCr基高温自润滑合金PM304涂层[J]. 金属学报, 2006, 42(11): 1212-1216 .
, , . A NiCr--Based High Temperature Self Lubricating Coating PM304 Prepared by Powder Metallurgy[J]. Acta Metall Sin, 2006, 42(11): 1212-1216 .

摘要 参考文献 相关文章 Metrics 全文: PDF(871 KB)   摘要: 将粉末粒径为50～100 µm的Ni80Cr20(60 wt％)合金粉末与Cr203(20 wt%)、Ag(10 wt%)和共晶BaF2/CaF2(10 wt%)三种粉末（自润滑相）按PS304成分配料后进行高能球磨，并将球磨粉末冷等静压到Ni基高温合金轴表面，经真空烧结成PM304涂层。研究表明，烧结温度对PM304的相对密度与拉伸强度有较大影响，当烧结温度从800℃增大到1100℃时，PM304的相对密度从80%增大到94%,拉伸强度从7 MPa增大到47 MPa。当烧结温度为1100℃时，PM304涂层组织细小致密，润滑相Cr203粒子尺寸为100 nm左右、BaF2/CaF2粒子尺寸为1 µm左右、Ag粒子尺寸小于5 µm，拉伸强度拉比PS304伸强度高出33％，在温度范围200～800℃的平均热膨胀系数为12.6×10-6 K-1。当烧结温度从1100℃增大到1200℃时，PM304的相对密度与拉伸强度变化不大，但NiCr相明显长大。 关键词 ： PM304,  自润滑,  NiCr基合金     Abstract：PM304 composite comprised of NiCr (80/20) matrix (60 wt%) combined with Cr2O3 (20 wt%), Ag (10 wt%) and eutectic BaF2/CaF2 (10 wt%) as solid self-lubricants additives has been prepared by high-energy ball milling and powder metallurgy. Experimental results showed that the sintering temperature had great influence on relative density and tensile strength of the PM304 composite. The relative density and tensile strength of PM304 increased rapidly with the increase of sintering temperature from 800°C to 1100°C. The size of Cr2O3 and BaF2/CaF2 of PM304 composite sintered at 1100°C was less than 1 μm, and that of Ag particles was below 5 μm, the relative density was 94%, and the mean tensile strength 47 MPa, 33% greater than that of PS304. Key words： PM304    self lubricating    NiCr alloy 收稿日期: 2006-04-17      ZTFLH:  TF123   服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 丁春华 王亚平 周敬恩 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y2006/V42/I11/1212 [1] Dellacorte C, Edmonds B J. NASA TM-107056, 1995 [2] Dellacorte C, Laskowski J A. NASA TM-107163, 1996 [3] Dellacorte C, Tribol Trans, 2003; 46: 361 [4] Dellacorte C, Edmonds B J. Tribol Trans, 2002; 45: 499 [5] Stanford M K, Eylon D. Ceram Eng Sci Proc, 2003; 24: 577 [6] Wang W C. Surf Coat Technol, 2004; 177: 12 [7] Li J F, Ding C X. Wear, 2000; 240: 180 [8] Radii K C, Dellacorte C. Tribol Trans, 2002; 45: 199 [9] Matejicek J, Sampath S. Ada Mater, 2003; 51: 863 [10] Fernandez J E, Rodriguez R, Wang Y. Wear, 1995; 181-183: 417 [11] He J. Nanostruct Mater, 1999; 10: 1271 [12] Gleiter H. Acta Mater, 2001; 48: 1 [13] DellaCorte C, Lukaszewicz V, Valco M J, Radii K C, Heshmat H. NASA; TM-209187, 2000 [15] Meredith B, Milner D R. Powder Metall, 1976, 19: 38 [16] Engel U, Hubner H. J Mater Sci, 1978; 13: 2003 [17] Dellacorte C. NASA TM-208660, 1998T [1] 张国涛, 尹延国, 童宝宏, 张兴权. 双层孔隙铁基粉末冶金材料可控制备及自润滑机理分析[J]. 金属学报, 2019, 55(11): 1448-1456. [2] 肖玲 丁春华 孙岩桦 虞烈. 感应烧结制备高温自润滑涂层及其性能研究[J]. 金属学报, 2011, 47(3): 327-332. [3] 王振生 郭建亭 周兰章 盛立远 胡壮麒. NiAl--Cr(Mo)--Ho--Hf共晶合金的高温磨损特性[J]. 金属学报, 2009, 45(3): 297-301. Viewed Full text Abstract Cited   Shared      Discussed