J.Y. Zhang
,
Z.Y. Fu
,
W.M Wang
,
H. Wang and X.M. Min State Key Lab .of Advanced Technologyfor Materials Synthesis and Processing
,
Wuhan University of Technolo gy
,
Wuhan 430070
,
China
金属学报(英文版)
Self consistent Field discrete variational Xα( SCF Xα DV) method was used to study the wettabilitybetween TiB2 Ceramic and Metals. The Metals were Ni, Mo, Ni+ Mo, and etc. microstructureof TiB2/ Fe, TiB2/ Niand TiB2/ NiMoinvestigatedby TEM werechosen toidentify the calculation model. The result shows the wetting in the above systems were chemicalreactive wetting ,and can becalculated by SCF Xα DV . Theeffectof active ele ment( Mo) to TiB2/ Ni wettability wasstudied too.
关键词:
wetting
,
null
,
null
ZHANG Shourong
钢铁研究学报(英文版)
One of the problems encountered in 60′s to 80′s of 20th century in China′s steel industry was short life of blast furnace shaft as well as the excessive erosion of blast furnace hearth. A series of research work was carried out in order to extend blast furnace campaign life. The concept of research and development was integrated in the construction of BF (blast furnace) No5 at WISCO (Wuhan Iron and Steel Corporation), and in October, 1991, the BF No5 was blown in. The blast furnace has worked smoothly for more than 15 years without any medium repair even guniting. It is expected that the campaign life of BF No5 would be longer than 16 years with a production over 11 000 t per unit inner volume (m3). A new blast furnace with an inner volume of 3 400 m3 is under construction, and is designed with a campaign life of 20 years without any medium repair. The campaign life of blast furnaces in China has been extended in recent years.
关键词:
blast furnace;campaign life;erosion
何航
,
刘永龙
中国冶金
doi:10.13228/j.boyuan.issn1006-9356.20160222
针对高品质大规格低碳高硫高磷钢(简称GY15)的特点,炼钢采用转炉低碱度保硫保磷、精炼低碱度弱搅拌、连铸低拉速弱冷却等工艺,轧钢采用延长加热时间、提高开轧温度、降低轧制速度以及轧材快速下线等工艺.实践结果表明,GY15的生产工艺设计是合理的,成分控制稳定,浇注过程中未发生漏钢事故,铸坯表面质量和内部质量良好;轧制过程中未出现轧件"开裂"或"打滑"现象,轧材内部组织均匀且无带状组织,轧材力学性能和硬度均满足客户要求.
关键词:
大规格
,
低碳高硫高磷
,
工艺
,
性能
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,组织稳定性较好;MC碳化物非常稳定,W能不断取代Ni、Cr、Co原子进入M23C6型碳化物,促进M23C6型碳化物缓慢析出,且M23C6还会依附于MC表面形核析出;γ '相的粗化速率较缓慢,稳定性较高,长大规律符合L-S-W理论,700℃时效长大粗化方程为γ-3-γ-3 =4.408×10-4t.
关键词:
镍基合金
,
长期时效
,
γ'相
,
碳化物
,
拉伸性能
