钢铁钒钛

Research on Beneficiation Process of Gansu Low-grade Ilmenite

Chen Kaida, Fu Jiangang, Wang Hui

2013, 34(1): 1-6. doi: 10.7513/j.issn.1004-7638.2013.01.001

Abstract(103) PDF(4)

Abstract:
A kind of low-grade ilmenite from Gansu province with Fe grade of 12.23% and TiO₂ grade of 3.80% was studied.In view of the occurrence state and percentage of Fe and Ti in the ore and acute shortage of water in the mining area,a combined technical solution of "pre-concentration for tailing discardin...

Analysis on Causes of and Countermeasures for Blockage of Chlorine Feeding Pipe in the Process of Molten Salt Chlorination

Lu Hui, Yang Renmu, Meng Jun, Xie Gang, Yang Wen

2013, 34(1): 7-12. doi: 10.7513/j.issn.1004-7638.2013.01.002

Abstract(72) PDF(1)

Abstract:
The causes of the blockage of chlorine pipe in the process of molten salt chlorination for TiCl₄ production are analyzed in this paper.It has been found that the main factors leading to blockage of chlorine pipe are temperature,raw materials,pressure,molten salt and operation.Some measures can be ta...

Recovery of Vanadium from Vanadium-bearing Molten Iron in Ladles in a Pilot Plant

Qin Jie

2013, 34(1): 13-17. doi: 10.7513/j.issn.1004-7638.2013.01.003

Abstract(110) PDF(2)

Abstract:
Recovery of vanadium from molten iron in ladles was carried out in a Pangang pilot plant for comprehensive utilization of vanadium and titanium resources,and influencing factors vanadium recovering process,including temperature,oxygen supply,slag skimming and Si content in the molten iron,were analy...

Effect of Temperature on Compressive Deformation and Damage Behavior of Commercially Pure Titanium(CP-Ti)

Jiang Qingwei, Jiang Yehua, Zhang Jun, Wang Jixian

2013, 34(1): 18-21. doi: 10.7513/j.issn.1004-7638.2013.01.004

Abstract(130) PDF(4)

Abstract:
The deformation and damage behavior of CP-Ti under unidirectional compression at temperatures ranging from-196℃ to 600℃ was studied by universal materials tester and scanning electron microscopy(SEM) etc.It has been found that the compressive deformation and damage behavior of this material is sensi...

High-temperature Deformation Behavior of New Near-β Titanium Alloy Ti-7333

Cheng Liang, Chang Hui, Fan Jiangkun, Tang Bin, Kou Hongchao, Li Jinshan

2013, 34(1): 22-25,40. doi: 10.7513/j.issn.1004-7638.2013.01.005

Abstract(134) PDF(2)

Abstract:
Compression tests were conducted under constant temperature to investigate the flow behavior of the new near-β titanium alloy Ti-7333.The results reveal that flow stress of the tested alloy is very sensitive to processing parameters.With the increase of temperatures and decrease of strain rates,the ...

Cause Analysis of Strip Cracks on Surface of TA17 Alloy Cold-rolled Sheet

Huang Deming, Yang Xiongfei, Wei Qingfeng, Chen Yong, Guo Hua, Jiang Rengui

2013, 34(1): 26-30. doi: 10.7513/j.issn.1004-7638.2013.01.006

Abstract(85) PDF(3)

Abstract:
Strip cracks along rolling direction on the surface of TA17 alloy cold-rolled sheet were observed by stereoscope,SEM and EDS.Morphology observation indicated that cracks were dominantly in zigzag shape,with 10~30 mm in length and less than 10 μm in depth,and there was no evidence of crack tips.Chemi...

Study on Hot-dip Aluminizing of Ti6Al4V Alloy

Zhu Tao, Wang Shuqi, Mao Yishu, Wang Haishuai, Yu Jianping

2013, 34(1): 31-34. doi: 10.7513/j.issn.1004-7638.2013.01.007

Abstract(79) PDF(1)

Abstract:
A layer of TiAl₃ intermetallic compound coating was prepared on Ti6Al4V alloy by hot-dip aluminizing,and the obtained sample was treated by thermal diffusion.The coating was analyzed by XRD and SEM to probe into its structure and compositions.The formation mechanism of the coating was also discussed...

Research on Decarbonizing and Temperature Increasing During Reblowing and End-Point Control of Converter

He Ping, Liu Liu, Zhao Jinxuan

2013, 34(1): 35-40. doi: 10.7513/j.issn.1004-7638.2013.01.008

Abstract(108) PDF(1)

Abstract:
On the basis of previous studies,rules of decarbonizing and temperature increasing close to the end-point of blowing during converter steelmaking were studied.A reblowing model was established,and the linear regression self-adaptive algorithm was used to achieve dynamic correction of the model's par...

Production Practice of Hydrogen-induced Cracking Resistant High-strength X65 Pipeline Steel

Wang Jian, Cheng Haitao, Chen Yong, Zeng Jianhua, Yi Lianggang, Zhou Yongjian, Chen Lian, Huang Shengquan, Yu Haibing, Chen Kun

2013, 34(1): 41-48. doi: 10.7513/j.issn.1004-7638.2013.01.009

Abstract(63) PDF(1)

Abstract:
With average [S] of 0.033%(in the range of 0.028%~0.039%),and average [P] of 0.133%(in the range of 0.129%~0.138%) in molten iron to be fed into converter,X65 pipeline steel was successfully produced through dephosphorization by double slag process in converter,modification of ladle slag during tapp...

Research on Sulfur Migration with Pulsed Electric Field Imposed on Slag-metal Interface

Wang Haichuan, Chen Kequan, Ge Yunzong, Liao Zhiyou, Chen Pengfei

2013, 34(1): 49-53. doi: 10.7513/j.issn.1004-7638.2013.01.010

Abstract(57) PDF(1)

Abstract:
Pulsed electric field has been imposed on interface between Fe-C-S alloy and CaO-MgO-Al₂O₃ slag for different durations to study sulfur distribution and migration between metal and slag.The experimental result shows that with the extension of imposing time,sulfur in the slag gradually increases,and ...

Study on Water Modeling for Optimizing Flow Control Device in Tundish for Three-strand Bloom Casting

Yu Zhuoying, Sun Yanhui, Li Shiwei

2013, 34(1): 54-57,68. doi: 10.7513/j.issn.1004-7638.2013.01.011

Abstract(80) PDF(1)

Abstract:
In view of excessive non-metallic inclusion content in a three-strand tundish for 320 mm×480 mm bloom casting,the effect of flow control device on flow characteristics of the tundish has been studied by water modeling with a geometrical similarity ratio 1:2 to optimize the tundish flow field.The res...

Removal of Non-metallic Inclusions in Non-oriented Silicon Steel by CaSi Wire Feeding During the RH Refining

Zong Zhenyu, Zhang Feng

2013, 34(1): 58-63. doi: 10.7513/j.issn.1004-7638.2013.01.012

Abstract(63) PDF(2)

Abstract:
Experimental study on removal of non-metallic inclusions in non-oriented silicon steel obtained from industrial production by CaSi wire feeding during RH refining process was carried out.The thermodynamics of CaS inclusion formation was analyzed,the morphology and the size distribution of inclusions...

An Investigation into Coal Blending and the Addition of Semi-coke

Du Gang, Yang Shuangping

2013, 34(1): 64-68. doi: 10.7513/j.issn.1004-7638.2013.01.013

Abstract(91) PDF(2)

Abstract:
The grindability,explosibility and ignition point of coal and semi-coke to be injected into blast furnace has been tested to determine the appropriate blending scheme,and the effect of coal blending on coal properties has also been discussed.The results show that through coal blending,the grindabili...

Influence of Cooling Speed on Transformation Behavior of V-N Microalloyed Steel

Zhang Jing, Xing Jun, Wang Kaizhong, Sun Wei, Zhang Weibin, Gong Yanhua

2013, 34(1): 69-72. doi: 10.7513/j.issn.1004-7638.2013.01.014

Abstract(93) PDF(1)

Abstract:
The microstructure transformation of V-N microalloyed steel during continuous cooling process was simulated with Gleeble-3500 thermomechanical simulator.The influence of cooling speed on microstructure and properties of the steel was analyzed.The results reveal that during continuous cooling of V-N ...

Research on Inclusions in Non-quenched and tempered Sulfur-bearing Steel for Autos

You Dali, Cui Heng, Wu Huajie, Yue Feng, Tian Enhua, Wang Zhenwei

2013, 34(1): 73-78. doi: 10.7513/j.issn.1004-7638.2013.01.015

Abstract(49) PDF(1)

Abstract:
Inclusions in different specimens of non-quenched and tempered sulfur-bearing steel for autos were analyzed with metallographic microscope,scanning electron microscope and energy-dispersive X-ray detector.The result shows that the inclusions in this kind of steel are dominantly in shape of strip,spi...

Research on Direct Quenching and Tempering Process of High-strength Steel for Engineering Machinery

Lu Feng, Wang Kun, Wang Chao, Wang Zhaodong, Wang Guodong

2013, 34(1): 79-85. doi: 10.7513/j.issn.1004-7638.2013.01.016

Abstract(159) PDF(5)

Abstract:
The microstructure and properties evolution behavior in direct quenching and tempering process of a low-alloy high-strength steel for engineering machinery was studied to provide experimental basis for online production of offline quenched and tempered high-strength steel.Coarse granular bainite str...

Analysis on Appearance and Cause of Scale Defects on the Steel Plate Surface

Chen Liansheng, Lu Junwei, Song Jinying, Tian Yaqiang

2013, 34(1): 86-92. doi: 10.7513/j.issn.1004-7638.2013.01.017

Abstract(184) PDF(7)

Abstract:
The appearance,microstructures and compositions of iron oxide scale on the strip steel surface were studied by means of SEM,EDS and XRD,and the causes of scale defects were analyzed.The results show that there are four main kinds of scale defects on the surface:①primary scale formed during roughing ...

Analysis on Types and Causes of Surface Scab on Steel Plate

Leng Yanhong, Song Jinying, Tian Yaqiang

2013, 34(1): 93-98. doi: 10.7513/j.issn.1004-7638.2013.01.018

Abstract(250) PDF(16)

Abstract:
Main scab defects arising in a hot rolling line were studied through metallographic microscope,scanning electron microscope and energy spectrometer.The results show that the formation of scab defects can be attributed to press-in of welding tumor,entanglement of converter alkaline slag and refining ...

Effect of Austenitizing Time on Spheroidized Microstructure of Bearing Steel GCr15

Guo Lin, Huo Xiangdong, Dong Feng

2013, 34(1): 99-103. doi: 10.7513/j.issn.1004-7638.2013.01.019

Abstract(100) PDF(2)

Abstract:
After hot-rolling and subsequent perforating,austenitizing at 805℃ for different lengths of time and three different spheroidizing annealing processes,the microstructures of bearing steel GCr15 were investigated using optical microscope and SEM.The results show that there are two types of microstruc...

2013, 34(1): 104-106.

Abstract(64) PDF(1)

Abstract:

2013 Vol. 34, No. 1