Y_2O_3和Ti含量对弥散强化铁合金组织结构和性能的影响  

Influence of Y_2O_3 and Ti Content on the Structure and Performance of ODS Iron Alloy

作　　者：赵昱臻[1] 王立新[1] 申毅[1] 

机构地区：[1]太原钢铁(集团)有限公司,山西太原030003

出　　处：《山西冶金》2015年第6期12-15,共4页Shanxi Metallurgy

基　　金：国家科技支撑计划资助项目(课题编号:2012BAE04B01)

摘　　要：以水热法制备的不同Y_2O_3含量的弥散强化(ODS)铁合金粉末为原料,通过机械合金化工艺加入质量分数分别为0、0.8%、2%的合金元素Ti,再采用放电等离子烧结(SPS)工艺制备弥散强化铁合金。采用扫描电镜(SEM)和电子拉伸试验机对样品进行观察和检测,研究弥散相Y_2O_3和合金元素Ti含量对弥散强化铁的微观组织和力学性能的影响。结果表明:当不加入合金元素Ti而Y_2O_3弥散相含量(质量分数)为1.0%时,弥散强化铁达到最佳力学性能,抗拉强度537 MPa;加入0.8%的合金元素Ti后,弥散相颗粒明显细化,抗拉强度和硬度均明显提高,抗拉强度达到710 MPa。Oxide Dispersion Strengthened（ODS）iron alloy powder with different Y_2O_3 contents is manufactured using hydrothermal method. Through mechanical alloying, Ti（alloying element）with varied mass fractions（0%, 0.8%, and2%）is added to the ODS iron alloy powder. Then the ODS iron alloy is manufactured using spark plasma sintering（SPS）technology. Scanning electron microscopy（SEM）and electron tensile testing machine are used to observe and test the samples. The effects of Y_2O_3 and Ti contents on microstructure and mechanical property are determined. Results show that without Ti, when the dispersed phase Y_2O_3 content is 1%, the ODS iron alloy achieves its optimum mechanical property, with 537 MPa tensile strength. After adding 0.8% Ti, the dispersed phase particles is significantly refined, and the tensile strength and hardness are significantly increased, with the tensile strength reaching 710 MPa.

关 键 词：氧化物弥散强化 水热合成 放电等离子烧结 力学性能 

分 类 号：TG141[一般工业技术—材料科学与工程]