铝含量对高硼高速钢组织及回火析出的影响  

Effect of Aluminum Content on Microstructure and Tempering Precipitation of High Boron High Speed Steel

作　　者：陈翰韬 马胜超 罗洋 汪婕 邢建东[1] 马胜强[1] CHEN Hantao;MA Shengchao;LUO Yang;WANG Jie;XING Jiandong;MA Shengqiang(Xi'an Jiaotong University,State Key Laboratory for Mechanical Behavior of Materials,Xi'an 710049,China;Avic Shaanxi Aero Electric Co.,Ltd.,Xingping 710065,China)

机构地区：[1]西安交通大学金属材料强度国家重点实验室,陕西西安710049 [2]中航工业陕西航空电气有限责任公司,陕西兴平710065

出　　处：《铸造技术》2021年第6期465-469,共5页Foundry Technology

基　　金：国家自然基金(51771143、52071254、xzyO12020002)。

摘　　要：铝元素是M2高速钢中重要添加元素,对高速钢的回火稳定性、高温抗氧化都有提高作用。因此,在高硼高速钢中加入不同含量的铝,研究铝对其组织和回火性能的影响。结果表明,含Al高硼高速钢组织由铁素体、珠光体和硼化物组成。适量的铝促进铁素体和珠光体的形成,而过量的铝导致粗大的初生硼化物形成。淬火回火后,少量铝的加人促使高硬度的纳米尺度M6(C,B)和M(C,B)弥散析出,显著提升了高硼高速钢的沉淀析出效果。Aluminum element is an important addition element in M2 high speed steel,which can improve the tempering stability and oxidation resistance at high temperature.The effect of aluminum on microstructure and tempering property of high boron high speed steel was studied by adding different contents of aluminum.The results show that the microstructure of high speed steel containing A1 and boron is composed of ferrite,pearlite and boride.An appropriate amount of aluminum promotes the formation of ferrite and pearlite,while too much aluminum leads to the formation of coarse primary borides.After quenching and tempering,the addition of a small amount of aluminum promotes the dispersion precipitation of high hardness nano-scale M6(C,B)and M(C,B),which significantly improves the precipitation effect of high boron high speed steel.

关 键 词：高硼高速钢 硼碳化物 初生相 二次相 

分 类 号：TG142[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]