等温锻造对SiC_p/Al复合材料颗粒分布的影响  

Effect of Isothermal Forging on Distribution of Particles of SiC_p/Al Composites

作　　者：魏少华[1] 樊建中[1] 张琪[1] 左涛[1] 邹利华[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心,北京100088

出　　处：《宇航材料工艺》2009年第4期52-57,共6页Aerospace Materials & Technology

摘　　要：开展了粉末冶金法制备的20%(体积分数)SiCp/2009Al复合材料坯锭的等温锻造实验,研究了不同变形量对锻件中SiC颗粒的分布以及力学性能的影响。结果表明,等温锻造变形量越大,锻件中的SiC颗粒分布越均匀,锻件强度和塑性越高。对于同一锻件而言,沿锻造轴向上,锻件的应变量呈现中部变形量大、两端变形量小的正态分布趋势,并且中部SiC颗粒分布较均匀,而两端的分布较差;沿锻造径向上,锻件不同部位应变量也存在差异,由此导致SiC颗粒分布均匀性不一致。20vol% SiCp/2009Al composites fabricated by powder metallurgy （PM） method were processed by i- sothermal forging and the effect of different deformation on distribution of SiC particles and mechanical properties were studied. The result shows that, with total strain increasing, distribution of SiC particles is better, the intensity and plasticity are higher. For the same forging, the strain shows normal distribution in the longitudinal direction with bigger dis- tortion in the central section and smaller distortion in both terminal sections. And distribution of SiC particles in the center is more uniform than that in the two terminal sections. Along the radial direction, there is obvious difference of distortion in different sections, which results in nonuniform distribution of SiC particles.

关 键 词：SICP/AL复合材料 等温锻造 力学性能 SiC颗粒分布 

分 类 号：TB333[一般工业技术—材料科学与工程] TG319[金属学及工艺—金属压力加工]