钢铁钒钛

Development and Problems of the Titanium Sponge Production Technology in China

Deng Guozhu

2011, 32(4): 1-5.

Abstract(175) PDF(7)

Abstract:
The rapid development of China's titanium sponge production,including capacity and technological progress(the international mainstream technologies have been applied in the main processes),are described in the paper.The problems of China's titanium sponge industry,such as overcapacity,shortage of ti...

Preparation of Porous Titania Photo-catalyst from Industrial Titanyl Sulfate Solution via Hydrothermal Synthesis

Pu Hong, Tian Congxue, Yang Ying, An Yun

2011, 32(4): 6-11.

Abstract(63) PDF(2)

Abstract:
Porous TiO₂ photo-catalyst is prepared via hydrothermal synthesis route from industrial titanyl sulfate solution,and the effects of calcination time on the structure and property of porous TiO₂ are also investigated.The as-prepared samples are characterized by XRD,SEM,XPS,FT-IR and BET,and their pho...

Research on Low-temperature Chlorination Process of Pangang Carbonized Slag

Huang Jiaxu, Yang Yangjun, Lu Ping, Liu Senlin

2011, 32(4): 12-15,50.

Abstract(84) PDF(8)

Abstract:
The low-temperature chlorination process of the Pangang carbonized slag is researched;and the effect of different chlorination temperatures,residence time,air velocity and chlorine concentration under continuous feeding and continuous slagging on the TiC chlorination rate is studied through the self...

Continuous Cooling Transformation of a Kind of Nb-Ti Microalloyed Steel

Zhang Xi, Li Deqiang

2011, 32(4): 16-21.

Abstract(72) PDF(2)

Abstract:
Continuous cooling transformation(CCT) tests at different deformation condition are carried out on the MMS-200 thermal simulator.Phase transition temperature of the tested steels at different cooling rates are determined through thermal expansion method combined with metallographic method.The percen...

Influence of Ti/N Ratio on Microstructure and Mechanical Properties of High Strength Bainitic Steel Plate

Zhang Tao, Hou Huaxing, Chen Junping, Wang Xiaoqiang, Liu Ming

2011, 32(4): 22-25.

Abstract(64) PDF(2)

Abstract:
The effect of Ti/N ratio on microstructure and mechanical properties of high strength low-carbon bainitic steel plate is investigated.The result shows Ti/N ratio have obvious effect on the yield of acid-soluble boron in steel and mechanical properties of that kind of steel.Boron yield of no more tha...

Research on Microstructure and Property of V-alloyed Superbainite Steel

Xu Guang, Yang Jing, Zou Hang, Bu Conghua, Cao Longfei

2011, 32(4): 26-30.

Abstract(76) PDF(2)

Abstract:
A new bainite steel with low carbon and low alloy additions is designed and refined in laboratory.The phase transformation test at air cooling condition is carried out on Gleebe-1500 thermal simulator.Bainite transformation range is decided according to the dilation curve and microstructure.Then iso...

Experimental Research on Production of Low-sulfur Iron Nuggets with Iron Concentrate Powder and Pulverized Coal

Ma Sai, Wang Jingsong, Ding Yingui, Wang Guang, Xue Qingguo

2011, 32(4): 31-35.

Abstract(82) PDF(2)

Abstract:
According to different experimental plans,reduction experiments of carbon-bearing pellets mainly composed of iron concentrate,pulverized coal,limestone and CaF₂ are carried out to analyze the production process of iron nuggets,chemical compositions and microstructure of slag and calculate the distri...

Numerical Studies on Metallurgical Behavior of Liquid Steel in Slab Mold with Electromagnetic Brake

Ni Shengqi, Peng Shiheng

2011, 32(4): 36-41.

Abstract(61) PDF(2)

Abstract:
The numerical simulation study on metallurgical behavior of liquid steel in the slab mold with and without electromagnetic brake is carried out.The numerical simulation results show that in the presence of EMBR,the velocity of liquid steel in the slab mold is reduced largely with the highest velocit...

Optimization of CAS Process by Physical Model Study

Shu Zhihao, Chen Yuanqing, Yan Huicheng, Chou Shengtao

2011, 32(4): 42-45.

Abstract(62) PDF(2)

Abstract:
In order to optimize the process of a 230 t CAS ladle,a physical model has been built with a scale factor of 1:4.Location of bottom lowing,gas flow rate and depth of the snorkel have been optimized by mixing time test,and the appropriate gas flow rate for deslagging has been determined in deslagging...

Physical Modeling Study on the Meniscus Flow Control in Vertical Slab Continuous Casting Mold

Zhao Zhigang, Chen Yuanqing, Shi Zhe, Hu Kuntai, Chou Shengtao

2011, 32(4): 46-50.

Abstract(76) PDF(2)

Abstract:
In order to study the influence of mold flow control device(MFCD) on mold flow field at low casting speed,a full scale water model has been set up to simulate the mold flow field of vertical slab continuous caster in Baosteel.With two types of submerged entry nozzle(SEN),the effect of equipping MFCD...

Effect of Unsteady Casting of Non-oriented Electric Steel Slab on the Iron Loss of Final Steel Sheets

Zhang Feng, Li Guangqiang, Ma Zhangsong, Chen Xiao

2011, 32(4): 51-57.

Abstract(52) PDF(2)

Abstract:
The amount,composition and size of inclusions in finished specimens of steady and unsteady casted non-oriented electric steel slabs are analyzed by electrolysis extraction of inclusions and SEM-EDS and the effect of inclusions on iron loss of coil is discussed.The results show that the main inclusio...

Study on the Reduction Swellability of Panzhihua V-Ti bearing magnetite Concentrate Pellets

Ma Lan, Yang Shaoli

2011, 32(4): 58-62.

Abstract(72) PDF(2)

Abstract:
The effect of the binder content and the calcination atmosphere on the reduction swellability of the pellets is monitored by the on-line pellet morphology detector.The research results show that by adding a small amount of binder(the bentonite content is less than 1.5%) to the Panzhihua V-Ti bearing...

Influence of Tempering on Microstructure and Mechanical Property of Si-Mn-Mo Bainite Steel

Yang Yu, Chen Xin, Du Zhenmin, Jin Jiyong

2011, 32(4): 63-66.

Abstract(64) PDF(2)

Abstract:
The influence of tempering at different temperature on microstructure and mechanical property of Si-Mn-Mo bainitic steel after quenching is studied in laboratory.It is found that strength and plasticity of this steel can be significantly improved through tempering after quenching.Mechanical properti...

Study on Thermal Simulation Experiment of CSP Hot Rolling of Fe-3%Si Steel

Ji Yunping, Jin Zili, Li Wei, Ren Huiping

2011, 32(4): 67-70.

Abstract(88) PDF(4)

Abstract:
The thermal simulation experiments of heating,hot rolling and coiling of Fe-3%Si steel are performed by simulating on site CSP process and environment.The recrystallization behavior of Fe-3%Si steel in the simulated CSP hot rolling process is studied by Gleeble-1500D thermal simulator.The results sh...

Research on Microstructure and Precipitates of Non-oriented Silicon Steel Sheets After Annealing for High-efficiency Motor

Li Yongchao, Li Na, Yue Erbin, Xiang Li, Zhang Yanling, Chou Shengtao

2011, 32(4): 71-75.

Abstract(79) PDF(3)

Abstract:
Effects of microstructure and precipitation on magnetic property of non-oriented silicon steel sheets after annealing for high-efficiency motor are studied in the paper by experiments.The annealed sheet exhibits a larger average grain size,obviously decreasing iron loss and slightly raising magnetic...

Hot Plasticity of 610L Continuous Cast Slab for Automobile Beam

Sun Wei, Sun Jiquan, Zhao Zhengzhi, Zhao Wenlong, Bao Kuo

2011, 32(4): 76-81.

Abstract(64) PDF(3)

Abstract:
The high-temperature thermoplasticity experiment of 610L continuous cast slab for automobile beam is performed at Gleeble-3500 thermal simulator.The fracture appearance and microstructure is examined with SEM.Results indicate that there are two brittle zones at temperature range of 1 300~600℃ in whi...

Study on Characteristics of Air-mist Jets of Secondary Cooling of Continuous Casting

Hua Qinian, Zhang Yazhu, Zhao Zengwu, Zhao Lifeng, Zhou Liping

2011, 32(4): 82-86.

Abstract(46) PDF(2)

Abstract:
A flow characteristic experiment for a nozzle used in a secondary cooling zone for continuous casting was carried out in a steelmaking plant to discuss the jet angle,water flow distribution and drop size etc.The experiment results contribute to further study on heat transfer mechanism,water spraying...

Carbon Macrosegregation Heredity of Cast Bloom of Special Steel and Microstructure Characteristics of Its Rolled Bar

Xu Weiyang, Cao Zhigang, Yan Huicheng, Tang Guangbo, Chou Shengtao

2011, 32(4): 87-91.

Abstract(80) PDF(3)

Abstract:
We followed the production of 20CrMnTi and 42CrMo steel and took the samples of cast bloom and rolled bar at the same batch.By analyzing their macrostructure and carbon macrosegregation,we found the carbon segregation had definitely inherit characteristics from cast bloom to its rolled bar,which led...

Improvement of Key Production Processes of 20CrMnTi Gear Steel

Cao Zhigang, Du Zhongze, Xu Weiyang, Yan Huicheng, Yu Haiming

2011, 32(4): 92-96.

Abstract(52) PDF(2)

Abstract:
The process management during the transportation of molten steel for gear steel production from BOF to electric furnace shop for further refining in the No.2 plant of a steel and iron company is briefly discussed.The dephosphorus and slag stopping in BOF,and the electricity delivery and calcium disp...

2011, 32(4): 97-98.

Abstract(73) PDF(2)

Abstract:

2011 Vol. 32, No. 4