粉末冶金技术2017，Vol.35Issue(1)：23-28,6.
烧结和锻造态Fe-2Cu-0.5C-0.11S材料的组织与力学性能研究
Microstructure and mechanical properties of sintered and forged Fe-2Cu-0.5C-0.11S materials
摘要
Abstract
Sintered and forged Fe-2Cu-0.5C-0.11S materials were prepared from domestic raw materials.Density,microstructure,static mechanical properties,and dynamic ultrasonic fatigue property of the materials were investigated.The results show that forging can effectively improve the density of the parts.An average density of 7.75 g/crm3 (relative density of 98.7％) is obtained.The microstructures of the sintered and forged samples are mainly composed of pearlite and ferrite,but the porosity of the forged samples is obviously less.The mechanical properties of the forged samples are improved significantly compared with those of the sintered samples.The tensile strength,yield strength,elongation,and hardness of the forged samples are 1018 MPa,778 MPa,4.0％,and HB 206,respectively,which increases by 155％,145％,167％,and 87％ than those of the sintered samples.Ultrasonic fatigue strength of the forged samples for 106,107,and 108 weeks is 437.7 MPa,351.1 MPa,and 281.7 MPa,respectively,which increases by 82％,70％,and 59％ than those of the sintered samples.In the same fatigue life,the fatigue strength of the forged samples is higher than that of the sintered samples,but the differences decrease with the increase of fatigue life.The sintered and forged samples all show the characteristics of brittle fracture in general,and the microscopic plastic deformation exists both in the sintered and forged samples.关键词
粉末锻造/显微组织/力学性能/超声疲劳Key words
powder forging/microstructure/mechanical properties/ultrasonic fatigue分类
矿业与冶金引用本文复制引用
杨硕,肖志瑜,关航健,张文,温利平..烧结和锻造态Fe-2Cu-0.5C-0.11S材料的组织与力学性能研究[J].粉末冶金技术,2017,35(1):23-28,6.基金项目
国家自然科学基金资助项目(51274103) （51274103）
广东省自然科学基金团队资助项目(2015A030312003) （2015A030312003）
广东省科技攻关资助项目(2015B020238008,2016B030302006) （2015B020238008,2016B030302006）
