增强体与粉末冶金316L不锈钢的反应性  

Reactivity between Various Reinforcements and Powder Metallurgy 316L Stainless Steel

作　　者：杨霞[1] 果世驹[1] 孟飞[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《机械工程材料》2005年第10期34-37,共4页Materials For Mechanical Engineering

基　　金：国家863高技术计划资助项目(2001AA337010)

摘　　要：在316L不锈钢粉中分别添加10％的TiC、WC、NbC、Al2O3、Si3N4五种增强体,研究了各种增强体与不锈钢基体的反应性及对烧结过程的影响。结果表明:TiC、WC、NbC与不锈钢基体有良好的相容性,能均匀分布到不锈钢基体中,可以有效提高其强度,添加TiC的不锈钢还表现出优越的耐腐蚀性;由于Al2O3与基体不锈钢相容性过差,不能发挥增强体的作用,使材料的强度和耐蚀性不良;添加Si3N4的不锈钢在烧结过程中Si3N4发生分解,弥散强化了基体,硅有促进烧结的作用,而氮均匀渗透到不锈钢中,有利于形成高强度的高氮钢,从而使其相对密度、硬度及耐蚀性都高于其他材料。The reactions between various reinforcements and 316L stainless steel were studied. The reinforcements included TiC, WC, Al2O3, Si3N4 and NbC, with an addition of 10wt% respectively. TiC, WC and NbC had a good consistency with the stainless steel matrix and they could react with the matrix well and diffuse into it uniformly, and thus improve the strength of powder metallurgy stainless steel The sample with 10wt% TiC addition had excellent corrosion resistance. Al2O3 had a poor consistency with the matrix leading to a composite with low strength and inferior corrosion resistance. Si3N4 had been decomposed during sintering, resulting in dispersion strengthening. Si could promote sintering and the evenly distributed N was in favor of forming high nitrogen stainless steel with very high strength. The sample with Si3N4 addition had a higher relative density, higher hardness and more superior corrosion resistance than other samples.

关 键 词：耐腐蚀性能 316L不锈钢 增强体 

分 类 号：TG132.3[一般工业技术—材料科学与工程] TF124.5[金属学及工艺—合金]