水射流辅助激光加热处理氮化硼表面硬化研究  

Study on Surface Hardening of Boron Nitride in Composite Laser Water Injection Heat Treatment

作　　者：王树才 

机构地区：[1]中铁十九局集团轨道交通工程有限公司,北京

出　　处：《材料科学》2021年第1期25-30,共6页Material Sciences

摘　　要：采用复合式CO2激光表面持续加热和水射流淬火相结合的新型热处理工艺对双相纤锌矿/立方氮化硼(wBN/cBN)表面进行改性处理,研究了水射流辅助激光热处理工艺对wBN/cBN硬度的影响。结果表明,伴随着快速淬火热处理的应力诱导相变和纳米尺寸晶粒的形成,双相wBN/cBN的维氏硬度最高可达到70 GPa,接近聚晶金刚石(PCD)的硬度。The surface of duplex wurtzite/cubic boron nitride (wBN/cBN) was modified by a new heat treat-ment process combining CO2 laser surface continuous heating and water jet quenching, the influ-ence of water jet assisted laser heat treatment on the hardness of wBN/cBN was studied. The re-sults show: With the stress-induced phase transition of the rapid quenching heat treatment and the formation of nano-sized grains, the vickers hardness of the two-phase wBN/cBN can reach 70 GPa, reaching the hardness of polycrystalline diamond (PCD).

关 键 词：单相立方氮化硼 双相纤锌矿/立方氮化硼 激光热处理 维氏硬度 微观结构 

分 类 号：TG1[金属学及工艺—金属学]