第一期 |
||
| 1.裂纹修复与激光技术
作者:黄开金,周金鑫,谢长生等 |
||
2.机械工程用功能梯度材料涂层制备技术及其应用 作者:陈再良,金康,刘淑英等 摘要:介绍了国内外功能梯度材料(FGM)的应用现状和发展方向,分析比较了目前功能梯度材料的主要制备方法和分类。列举了现阶段FGM材料的应用范围。在此基础上提出了对我国发展应用FGM材料的一些构思和需要注意的问题。 关键词:功能梯度材料,涂层,热喷涂 abstract: This paper reviews the development and current status of FGM's application after introdused the concept of FGM(Functionally Graded Materials) . The main preparation and classification of FGM are discussed and all the preparations are compared in this paper. All the current application scopes of FGM are discussed and all the preparations are compared in this paper. All the current application scopes of FGM are listed in details. The paper also reviews the experience of advanced FGM's developed country are presented. 摘自《金属热处理》2002年第三期 |
||
3.新型1500MPa级高强钢的氢脆敏感性研究 作者:常开地,顾家琳,方鸿生等 摘要:根据钢材组织设计的思想,通过优化成分和工艺设计、研制出一种新的1500MPa级高强钢。采用阴极电解充氢的方法对其氢脆敏感性进行了研究,并与同一强度级别的42CrMo高强钢进行了对比。结果表明,所设计的1500MPa级高强钢的氢脆敏感性低于传统的42CrMo高强钢。SEM断口观察显示,两者的断口形貌也不同,1500MPa级高强钢为准解理断裂,而42CrMo高强钢为沿晶断裂。断口金相表明,前者的裂纹主要沿着贝氏体/马氏体(B/M)边界扩展,断裂模式为板条界分离,后者的裂纹沿着晶界扩展。对1500MPa级高强钢进行了TEM观察,发现其组织为贝氏体/马氏体复相组织,残留奥氏体以薄膜状存在于贝氏体内部及贝氏体条片、马氏体板条间。 关键词:1500MPa级高强钢,氢脆敏感性,贝氏体/马氏体复相组织 abstract: The susceptibility to hydrogen embrittlement for novel 1500MPa high strength steel designed by optimized composition and technology based on the idea of microstructure design was investigated by means of cathodic electrolytic hydrogen charging in this paper, which was compared with 42CrMo high strength steel in similar strength grade. The results show that the susceptibility to hydrogen embrittlement of the novel 1500MPa high strength steel is inferior to that of conventional 42CrMo high strength steel. 摘自《金属热处理》2002年第三期 |
||
4.淬火温度对Cr-Mo-V系低合金高强度钢力学性能的影响 作者:惠卫军,董翰,王毛球等 摘要:研究了改变淬火温度对Cr-Mo-V系高强度钢力学性能的影响。结果表明,随着淬火温度的升高,硬度和强度逐渐提高,但当淬火温度超过1000℃,硬度和强度的变化不明显。在所研究的整个淬火温度范围内,随着淬火温度的升高,塑性和韧性逐渐降低,且韧性的降低幅度更大。由于添加了微合金元素V和Nb,当淬火温度低于1000℃,试验钢具有细小的奥氏体晶粒。 关键词:高强度钢,淬火温度,力学性能,二次硬化 abstract: In this paper, the influences of quenching temperature on the mechanical properties of low-alloy high strength Cr-Mo-V steel were studied. The results show that with incresing the austenitizing temperature, hardness and strength increase until at an austenitizing temperature of 1000℃ when hardness and strength remain almost constant. Ductility and impact toughness decrease as the austenitizing temperature increases. The steel has finer austenite grain size for the addition of microalloying element of vanadium and niobium. 摘自《金属热处理》2002年第三期 |
||