Effect of Sintering Temperature on Structure and Properties of Powder Metallurgy Fe-Cu-C Alloy under Industrial Condition
摘 要
在实际工业生产条件下采用粉末冶金技术制备Fe-Cu-C合金,研究了烧结温度(1 060~1 160 ℃)对其密度、显微组织、物相组成、力学性能的影响。结果表明:随着烧结温度的升高,合金的密度先增大后降低,并在1 140 ℃时达到最大值(7.02 g·cm-3);随着烧结温度的升高,合金组织中颗粒的球化程度提高,孔隙的尺寸减小、数量降低,显微组织趋于稳定,铜相衍射峰消失,Fe4Cu3相衍射峰出现;合金的抗拉强度、硬度随烧结温度的变化趋势与密度的基本相同,且均在1 140 ℃时达到最大值,分别为460 MPa,185 HRB,拉伸断口均主要呈脆性断裂特征;工业生产条件下制备的合金的力学性能指标基本与在实验室条件下制备的相吻合。
Abstract
Fe-Cu-C alloy was prepared by powder metallurgy technology under practical industrial condition, and the effect of sintering temperature (1 060-1 160℃) on density, microstructure, phase composition and mechanical properties of the alloy was studied. The results show that with the increase of sintering temperature, the density of the alloy increased first and then decreased, and reached the maximum value of 7.02 g·cm-3 at 1 140℃. With the increase of sintering temperature, the spherification degree of particles in structure of the alloy increased, and the mount and size of pores both decreased; the microstructure tended to be stable; the diffraction peak of copper phase disappeared, while the Fe4Cu3 phase appeared. The tensile strength and hardness had the same trend with sintering temperature as that of density, and both reached the maximum values of 460 MPa and 185 HRB at 1 140℃, respectively; all tensile fractures were mainly characterized by brittle fracture. The mechanical property indexes of the prepared alloy indexes industrial condition were almost the same with those under laboratory condition.
中图分类号 TF124 DOI 10.11973/jxgccl202001012
所属栏目 材料性能及应用
基金项目 甘肃省科技厅科技支撑计划项目(1604GKCE016);天水师范学院中青年教师科研项目(YB-2018-07)
收稿日期 2018/12/27
修改稿日期 2019/11/26
网络出版日期
作者单位点击查看
备注罗海玉(1970-),男,甘肃天水人,教授,硕士
引用该论文: LUO Haiyu,LIU Bo,HUANG Zhihong,YANG Xiaokang. Effect of Sintering Temperature on Structure and Properties of Powder Metallurgy Fe-Cu-C Alloy under Industrial Condition[J]. Materials for mechancial engineering, 2020, 44(1): 68~73
罗海玉,刘博,黄志鸿,杨小康. 工业生产条件下烧结温度对粉末冶金Fe-Cu-C合金组织和性能的影响[J]. 机械工程材料, 2020, 44(1): 68~73
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【7】杨芳, 隋延力, 郭志猛, 等. 铁粉表面硫化处理制备高密度Fe-Cu-C合金[J]. 工程科学学报, 2017, 39(2):232-237.
【8】SHARMA S M, ANAND A. Effect of speed on the tribological behavior of Fe-Cu-C based self lubricating composite[J]. Transactions of the Indian Institute of Metals, 2018, 71(4):883-891.
【9】曾海卒, 李志友, 张雷,等. Mn含量对粉末冶金铁铜碳低合金钢组织与力学性能的影响[J]. 粉末冶金材料科学与工程, 2016, 21(4):658-664.
【10】LI F, YI J, ECKERT J. Optimization of the hot forging processing parameters for powder metallurgy Fe-Cu-C connecting rods based on finite element simulation[J]. Metallurgical & Materials Transactions A, 2017, 48(12):6027-6037.
【11】陆宇衡,肖志瑜,陈露,等.Fe-Cu-Mn-C合金的性能与烧结行为[J].粉末冶金材料科学程,2014,19(5):707-714.
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