摘要
分析了钼材料脆性产生的两大原因:本征脆性和间隙杂质在晶界上的富集。论述了钼金属的主要强韧化技术,包括固溶强韧化、碳化物弥散强韧化、稀土氧化物弥散强韧化、气泡强韧化、复合强韧化等的作用机制、主要合金及发展现状。系统阐述了固-固、液-固和液-液掺杂法等传统掺杂方法,扩散沉积、多步内氮化处理等新型合金化技术的工作原理、工艺要点和优缺点。传统掺杂方法不能达到理想效果的原因在于其属于物理意义上的物质混合,无法形成具有稳定成分组成的物相。
Two causes of brittleness of molybdenum are present,i.e.its intrinsic frangibility and the concentration of various impurities in the grain boundary.The main strengthening and toughening technologies of molybdenum,including solid solution strengthening and toughening,molybdenum carbides dispersion strengthening,rare earth oxides dispersion strengthening and toughening,bubble strengthening and toughening,compositing strengthening and toughening technologies,etc,are systematically discussed.And the mechanisms and some representative alloys and current level of development on these technologies are exhibited.The compositing strengthening and toughening technologies would ensure molybdenum alloys with excellent comprehensive mechanical performance.The operation principles,key processes,advantages and disadvantages of the traditional doping methods consisting of solid-solid,liquid-solid and liquid-liquid doping methods and some new alloying technologies（e.g.diffusion deposition,multi-step internal nitriding,etc） are summarized in detail.The traditional doping methods have no desired effect by virtue that those methods can only make the alloy composites physically mixed,it is unable to form some phases with stable composition.
出处
《铸造技术》
CAS
北大核心
2011年第4期554-558,共5页
Foundry Technology
基金
863计划项目(2008AA031002
2007AA03Z517)
关键词
脆性
强韧化
掺杂
钼
Brittleness
Strengthening and toughening technologies
Doping
Molybdenum
