添加Cu_(3)P对铁基粉末冶金气门导管材料组织与力学性能的影响  

Effect of adding Cu_(3)P on the microstructure and mechanical porperties of iron-based powder metallurgy valve guide materials

作　　者：吕威 王天国 华建杰 LÜWei;WANG Tianguo;HUA Jianjie(School of material science and engineering,Hubei University of Automotive Technology,Shiyan 442002,China;DongFeng Powder metallurgy Company of Dongfeng Motor Parts and Componenets Group Co.,Ltd,Shiyan 442700,China)

机构地区：[1]湖北汽车工业学院材料科学与工程学院,湖北十堰442002 [2]东风汽车零部件(集团)有限公司东风粉末冶金公司,湖北十堰442700

出　　处：《粉末冶金工业》2023年第6期81-87,共7页Powder Metallurgy Industry

摘　　要：研究不同Cu_(3)P含量对铁基粉末冶金气门导管材料的显微组织、密度、力学性能和耐磨性的影响。结果表明:在烧结温度为1 135℃,Cu_(3)P的添加量为0.45%时,组织中的孔隙数量最少,孔隙尺寸较小且分布均匀。当Cu_(3)P的添加量为0.45%时,解理面减小,孔隙减小,韧窝较深,且均匀分布,此时力学性能达到最优,硬度和抗拉强度分别达到73.1HRB和337.3 MPa。摩擦磨损实验表明,Cu_(3)P含量为0.45%,铁基粉末冶金气门导管材料的磨损量最小,摩擦因数最小,其耐磨性能最优。The effect of different Cu_(3)P contents on the microstructure, density, mechanical properties and wear resistance of powder metallurgy valve guide materials were studied. The results show that when the sintering temperature is 1 135 ℃, and the addition amount of Cu_(3)P is 0.45%, the number of pores in the microstructure is the least, the pore size is small and the distribution is uniform. When the addition amount of Cu_(3)P is 0.45%, the cleavage surface is reduced, the pores are reduced, the dimples are deeper, and the distribution is uniform. At this time, the mechanical properties reach the optimum, and the hardness and tensile strength reach 73.1HRB and337.3 MPa, respectively, respectively. The friction and wear experiments show that when the Cu_(3)P content is0.45%, the iron-based powder metallurgy valve guide material has the smallest wear amount, the smallest friction coefficient, and the best wear resistance.

关 键 词：气门导管 粉末冶金 Cu_(3)P含量 力学性能 耐磨性 

分 类 号：TF125.1[冶金工程—粉末冶金]