摘要
采用热模压制技术制备了高密度的Fe-4Ni-1.5Cu-0.5Mo-0.5C材料,并研究了热处理工艺对其密度、显微组织和力学性能的影响。结果表明:在850℃淬火,随保温时间的延长,抗拉强度和硬度逐渐增大,但对密度影响不大;热处理工艺为850℃保温120min时,其性能最佳,密度为7.23 g/cm3,抗拉强度为883MPa,硬度为72.8HRA。热处理后铁基合金组织由铁素体、珠光体、贝氏体转变为回火马氏体和部分残余奥氏体组成;断口形貌分析表明,铁基合金热处理后的断裂机理为典型的解理断裂。
The high density Fe-4Ni-I.5Cu-0.5Mo-0.5C material was fabricated by heat-die compaction, and the influences of heat treatment on the density, microstructure and mechanical properties of the materials were investigated. The results show that with the increase of holding time, the tensile strength and hardness increase, but the density has little effect; the iron-based material with the density of 7.23 g/em3, tensile strength of 883 MPa and hardness of 72.8 HRA can be obtained after quenching at 850 ℃ for 120 min. The mierostructure of iron-based alloy consists of ferrite, pearlite and bainite changing to tempered martensite and some retained austenite after heat treatment, Fractograph eonftrms that the fracture type is mainly cleavage fracture.
出处
《热加工工艺》
CSCD
北大核心
2013年第14期184-186,共3页
Hot Working Technology
关键词
热处理
粉末冶金
微观组织
力学性能
heat treatment
powder metallurgy
microstructure
mechanical properties
