摘要
采用部分扩散预合金化和温压工艺制备含锰铁基合金,研究合金元素及其含量对铁基烧结材料组织和性能的影响。结果表明,不同Mn含量的Fe-2Cu-xMn-0.6C(x=0.5,1.0,1.5,2.0,2.5)合金,随Mn含量增加,由于氧化加剧造成材料的孔隙率升高,进而导致抗拉强度下降;当Mn含量为0.5%(质量分数)时其抗拉强度达到最大值718 MPa,表观硬度则在Mn含量为2.5%时获得最大值94 HRB;压坯的弹性后效随Mn含量提高先增加后降低,烧结后材料有稍微膨胀;含锰量为1.0%的材料具有良好的综合力学性能,抗拉强度和硬度分别达到612 MPa和76 HRB,弹性后效和烧结膨胀分别为0.16%和0.32%;材料的显微组织以铁素体和珠光体为主。
The partially-diffuse alloying and warm compaction techniques were used to fabricate the iron-base alloys containing manganese. Effect of Mn content on the microstructure and properties of iron-base sintered materials was investigated. The results show that for the Fe-2Cu-xMn-0.6C （x=0.5, 1.0, 1.5, 2.0, 2.5） alloy, tensile strength decreases with increasing Mn content due to the porosity increase that caused by oxidation. When the mass fraction of Mn is 0.5%, the tensile strength reaches a maximum value of 718 MPa;When the Mn content is 2.5%, hardness reaches a maximum value of 94 HRB. The elongation of the green compact firstly increases and then decreases, and the dimensional change is not significant. The material with 1.0%Mn has a better mechanical property with tensile strength of 612 MPa, hardness of 76 HRB. Springing back effect and the expansion are 0.16%and 0.32%, respectively. The microstructure composes of mainly pearlite and ferrite.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2013年第6期821-826,共6页
Materials Science and Engineering of Powder Metallurgy
基金
国家自然科学基金资助项目(51274103)
中央高校基本科研业务费专项资金项目(20142P0011)
关键词
铁基合金
含锰烧结钢
粉末冶金
力学性能
iron-based alloys
manganese-containing sintering steels
powder metallurgy
mechanical property
