钢铁钒钛

Study on Catalytic Mechanism of Reducing Hematite by Carbon at Low Temperature

Guo Peimin, Zhao Pei, Zhang Dianwei

2006, 27(4): 1-5.

Abstract(278) PDF(7)

Abstract:
The catalytic mechanism of reducing hematite was elucidated by experiments of Boudouard reaction and reducing hematite by CO gas and carbon.The rate of gasification reaction and reduction reaction was increased and showed similar tendency after addition of the catalyst.The catalytic effect of K₂CO₃ ...

Study on Electromagnetic Stirring Parameter in Secondary Cooling Zone for Billet Continuous Caster

Wang Biao, Xie Zhi, Lin Guoqiang, Ji Zhenping, Liu Wenhong, Jia Guanglin

2006, 27(4): 6-9,24.

Abstract(74) PDF(1)

Abstract:
The thickness of solidified billet shell in secondary cooling zone was initial calculated by mathematics model and the pin-shooting situation was confirmed with the practical production situation of the continuous caster in EAF Steelmaking Plant of Nanjing Iron and Steel Co.Ltd.Crater end situation ...

Test and Analysis on Magnetic Field in M-EMS for Billet Caster

Zhou Liang, Tang Ping, Li Yongxiang

2006, 27(4): 10-13.

Abstract(82) PDF(1)

Abstract:
The magnetic field of in-mold electromagnetie stirrer（M-EMS）in Chongqing Iron ＆ Steel Company was measured.The magnetic field characteristic was discussed,and the relations of magnetic field and current,frequency and z direction in the mold were analyzed.The optimum frequency which was 4 Hz under wo...

Research on Mold Electromagnetic Stirring Technologies for Bloom Continuous Casting of Heavy Rail

Chen Yong, Yang Subo, Li Jianquan, Chen Lu:Ying

2006, 27(4): 14-20,24.

Abstract(74) PDF(3)

Abstract:
Metallurgical results of mold electromagnetic stirring（MEMS）in continuous casting previous employed at continuous bloom caster for heavy rail steel was not fully achieved.Therefore,experiments for optimizing process parameters of M-EMS for heavy rail steel was carried out.In order to analyze the inf...

Effect of Coiling Temperature on Microstructures and Mechanical Properties of Hot-rolled Bands of Ti-IF Steel

Zheng Zhiwang, Chen Jie, Zhou Dan

2006, 27(4): 21-24.

Abstract(90) PDF(3)

Abstract:
Effect of coiling temperature on microstructures and mechanical properties of hot-rolled bands of Ti -IF steel was studied by means of optical microscopy,X-ray texture measurement and tensile property testing.The results show that the hot bands not only exhibit fine-grained ferrite measured to be ap...

Experiment on Synthetic Slag for Si-killed Steel Desulphurization

Hao Ning, Wang Haitao, Wang Xinhua, Li Hong, Wang Wanjun

2006, 27(4): 25-28.

Abstract(84) PDF(4)

Abstract:
Top slag plays a very important role for desulphurization during ladle refining.To prevent[Al]increasing,a synthetic slag without alumina （CaO-SiO₂-CaF₂）has been chosen for Si-killed steel.The laboratorial results show that the synthetic slag with initial composition of CaO 66%,SiO₂ 17%,CaF₂ 15% and...

Steelmaking Process of V Micro-alloying High Strength Steel in EAF

Mao Xinping, Chen Xuewen, Li Liejun, Xu Chuanfen, Zhuang Hanzhou, Yan Xuchang

2006, 27(4): 29-33.

Abstract(71) PDF(1)

Abstract:
Based on the research for metallurgical characteristics of EAF and utilizing the feature of high N content in EAF steelmaking,a V micro-alloyed high strength hot rolling steel plate with 550 MPa yield strength has been successfully developed by using VN alloy in the V micro-alloying treatment.The ai...

Study on Static-recrystallization and Continuous Cooling Transformation of Undercooling Austenite for X60 Pipeline Steel

Peng Haihong, Chen Ye, Li Guobao, Luan Yuwu

2006, 27(4): 34-37.

Abstract(71) PDF(1)

Abstract:
The static recrystallization of X60 pipeline steel was measured by double-pass compression test on a Gleeble-1500 thermomechanical simulator.The expanding curves and continuous cooling transformation curve （dynamic CCT curve） of X60 pipeline steel were obtained by dilatometry and microscopic test un...

Thermodynamic Analysis on Direct Alloying of V₂O₅

Zhou Yong, Li Zhengbang

2006, 27(4): 38-42.

Abstract(65) PDF(1)

Abstract:
The equilibrium composition of V₂O₅ and reductant during direct alloying of V₂O₅ as a complex system composed of muti-component and multi-phase were simulated by HSC and then analyzed.The result of thermodynamic calculation shows that the reduced products of V₂O₅ carbothermic reduction is the carbid...

Effect of Vanadium on Deformation Induced Phase Transformation of High Nitrogen Steel

Zhang Kaihua, Yong Qilong

2006, 27(4): 43-47.

Abstract(71) PDF(2)

Abstract:
The microstructure and ferrite volume fraction of high-nitrogen vanadium steel and the base steel were studied with Gleeble-3500 simulator and optical microscopy.The effects of vanadium on deformation induced ferrite transformation of high-nitrogen steel were analyzed.The results showed that vanadiu...

Effect of Sulphide on Fatigue Crack Initiation of W6Mo5Cr4V2 Cold Ring-rolling Mandrel

Xu Jianbing, Yu Jixing, Su Kai

2006, 27(4): 48-52.

Abstract(65) PDF(1)

Abstract:
There is plus-minus duplicity in the effect of sulplide inclusion on fatigue crack initiation.The effect of sulplide shapes,size,distribution and mechanical property on the fatigue fracture of high speed steel W6Mo5Cr4V2 cold ring-rolling mandrel is analyzed.It is considered that soft sulplide has s...

Application and Development Trend of Advanced High Strength Steel for Auto

Su Kai, Yu Jixing, Xu Jianbing

2006, 27(4): 53-57,62.

Abstract(58) PDF(1)

Abstract:
Main progress in the advanced high strength steel and its applications in the automobile industry are reviewed.The theorem,composition,characteristic of several advanced high strength steel are given in details,which includes BH steel,DP steel and TRIP steel.Furthermore,the present application and d...

Spectroscopic Analysis Method of Vanadium in Ti-based Alloy

Liu Ping, Liu Haoxin

2006, 27(4): 58-62.

Abstract(80) PDF(1)

Abstract:
The characteristics of visible light spectrum used for spectroscopic analysis of vanadium in Ti-based alloy were investigated with grating spectroscope and prism spectroscope.The visible light spectra of V and Ti were simulated by computer system and the color spectra were shot with spectroscope.The...

2006 Vol. 27, No. 4