<strong>Cu</strong>含量和烧结温度对<strong>Fe-Cu</strong>基粉末冶金复合材料摩擦磨损性能的影响

doi:10.11901/1005.3093.2019.324

材料研究学报

2020, Vol. 34

Issue (2): 137-150 DOI: 10.11901/1005.3093.2019.324

研究论文

本期目录 | 过刊浏览

Cu含量和烧结温度对Fe-Cu基粉末冶金复合材料摩擦磨损性能的影响

石磊¹,赵齐¹(

),罗成¹,陈浩¹,杨继彪¹,张晓东²,李贤斌²

1. 湖北汽车工业学院材料科学与工程学院十堰 442002
2. 东风汽车零部件(集团)有限公司东风粉末冶金公司十堰 442700

Effect of Copper Content and Sintering Temperature on Friction and Wear Properties of Powder-metallurgical Fe-Cu Based Composites

SHI Lei¹,ZHAO Qi¹(

),LUO Cheng¹,CHEN Hao¹,YANG Jibiao¹,ZHANG Xiaodong²,LI Xianbin²

1. School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002，China
2. Dongfeng Powder Metallurgy Company, Dongfeng Motor Parts and Components (Group) Co. Ltd. , Shiyan 442700, China

引用本文:

石磊,赵齐,罗成,陈浩,杨继彪,张晓东,李贤斌. Cu含量和烧结温度对Fe-Cu基粉末冶金复合材料摩擦磨损性能的影响[J]. 材料研究学报, 2020, 34(2): 137-150.
Lei SHI, Qi ZHAO, Cheng LUO, Hao CHEN, Jibiao YANG, Xiaodong ZHANG, Xianbin LI. Effect of Copper Content and Sintering Temperature on Friction and Wear Properties of Powder-metallurgical Fe-Cu Based Composites[J]. Chinese Journal of Materials Research, 2020, 34(2): 137-150.

全文: PDF(8934 KB) HTML

摘要:

研究了铜含量和烧结温度对Fe-Cu基粉末冶金复合材料摩擦磨损性能影响。结果表明，Cu含量为20%~60%，随着Cu含量的提高耐磨性能先随之提高，Cu含量为40%时耐磨性能达到最优值，平均摩擦系数最小为0.172，磨损量为0.007 g；随着Cu含量的进一步提高耐磨性能反而降低。烧结温度为1096~1296℃时，随着烧结温度的提高耐磨性能随之提高，温度达到1196℃时耐磨性能达到最优，平均摩擦系数最小为0.123，磨损量为0.0018 g；烧结温度再提高耐磨性能反而降低。在最优工艺烧结过程中液相Al分别与Fe和Cu基体生成固溶体，使材料的密度和强度提高。MnS分解后，Mn与Fe基体生成固溶体，部分C也与Fe基体生成固溶体，两者促进了合金的固溶强化。其余的单质C，使合金的润滑性能提高。烧结后，Cu晶粒组织变得均匀细小，在Fe基中以网状形式存在。以上各组元的特殊作用使Fe-Cu基复合耐磨材料具有优异的耐磨性能。

关键词 ：复合材料, Fe-Cu基, 摩擦磨损, 铜含量, 烧结温度

Abstract：

The effect of Cu content and sintering temperature on the friction and wear properties of powder-metallurgical Fe-Cu based composites was investigated. The results show that the wear resistance first increases with the increase of Cu content within a range of 20%~60% Cu. Then the wear resistance reaches the optimum with the average friction coefficient of 0.172 and wear loss of 0.007 g for the composite with 40% Cu. However, the wear resistance begins to decrease when the Cu content further increases. Similarly, the wear resistance first increases with the increase of sintering temperature within the range of 1096~1296^oC. Then the wear resistance achieves the optimum with the average friction coefficient of 0.123 and wear loss of 0.0018 g for the composite sintered at 1196^oC. When sintering at higher temperatures, the wear resistance decreases again. During sintering with optimal process parameters, the molten Al may form solid solution with Fe and Cu, which improves the density and strength of the composite. Meanwhile, the decomposition of MnS yields atomic Mn, which mainly forms solid solution with Fe. Also, a part of C in the composite also forms solid solution with Fe. The above facts may in turn generate the solid solution strengthening of the Fe-Cu based alloy. Besides, there exists residual elemental carbon in the Fe-Cu based alloy, which enhances the lubrication of the alloy. After sintering, the grains of Cu become finer presenting as a network in the Fe based matrix. The excellent wear resistance of Fe-Cu based composite can be attributed to the special functions of the individual component of the composite.

Key words： composite Fe-Cu based friction and wear Cu content sintering temperature

收稿日期: 2019-07-01

ZTFLH:

TF124

基金资助:湖北汽车工业学院博士科研启动基金(BK201702);湖北省自然科学基金(2018CFB177);汽车动力传动与电子控制湖北省重点实验室开放基金(湖北汽车工业学院)及大学生创新创业训练项目(DC2019052)

作者简介: 石磊，男，1997年生，学士

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图1 不同铜含量的铁-铜基材料的密度曲线

图2 烧结温度不同的铁-铜基材料的密度曲线

图3 铁-铜基材料的显微硬度与铜含量的关系

图4 铁-铜基材料的显微硬度与烧结温度的关系

图5 不同铜含量的铁-铜基材料抛光后未腐蚀时的金相组织

图6 铜含量不同的铁-铜基材料中Fe、Cu晶粒的平均尺寸和孔隙大小

图7 烧结温度不同的铁-铜基材料抛光后未腐蚀时的金相组织

图8 烧结温度不同的铁-铜基材料中Fe、Cu晶粒的平均尺寸和孔隙大小

图9 不同铜含量材料的摩擦因数

图10 烧结温度不同的材料的摩擦因数

图11 铜含量为40%的铁-铜基材料在1196℃烧结1 h前后的XRD谱

图12 铜含量为40%试样烧结前的元素面扫描分布形貌

图13 铜含量为40%试样在1196℃烧结1 h后的元素扫描分布形貌

图14 铜-铁二元合金相图

图15 不同铜含量摩擦材料的磨损形貌

图16 不同烧结温度摩擦材料的磨损形貌

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