何明锭
,
李爽
,
吴晓春
上海金属
对比研究了热作模具钢SDCM钢和H13钢在600℃和650℃下的热稳定性能.利用金相显微镜、扫描电镜和X射线衍射仪分析了SDCM钢在热稳定性试验中的微观组织变化.结果表明:SDCM钢较H13钢热稳定性更好;随着保温时间增加,钢中位错密度降低,且钢硬度与位错密度有直接关系;SDCM钢中VC保持稳定,主...
关键词:
热作模具钢
,
热稳定性
,
位错密度
,
碳化物
何西扣
,
王鲁
,
汪力
,
杨钢
,
刘正东
上海金属
研究了一种新型耐热合金GY200在700 ℃长期时效过程中的组织与性能稳定性.结果表明,在时效过程中,GY200合金的室、高温力学性能的稳定性较好,且时效5 000 h后的综合力学性能较标准热处理态有所提升;时效过程未发现μ相、σ相、P相等TCP有害相析出,碳化物和γ'相未发生明显粗化,组织稳定性较...
关键词:
镍基合金
,
长期时效
,
γ'相
,
碳化物
,
拉伸性能
Limin LIU
,
Shaoqing WANG
,
Hengqiang YE
材料科学技术(英文)
The interface structure, work of adhesion, and bonding character of the polar TiC/Ti interface have been examined by the first-principles density functional plane-wave pseudopotential calculations. Both Ti- and C-terminated interfaces including six different interface structures were calculated, whi...
关键词:
First-principles
,
null
,
null
,
null
Zheng LIU
,
Ligang WANG
,
Lai WANG
材料科学技术(英文)
The microstructures, the changing rule of carbon-enriched zone, the diffusion behaviors of elements C and Cr, and the carbide type of 0Cr6Mn13Ni10MoTi/1Cr5Mo dissimilar welded joints after aging at 500℃ for various times and after long-term service in technical practice were investigated by using th...
关键词:
Dissimilar welded joint
,
null
,
null
,
null