钢铁钒钛

Effect of Technical Parameters on Synthesized Vanadium Carbonitride by One Step Method

Yu Sansan, Fu Nianxin, Gao Feng, Sui Zhitong

2007, 28(4): 1-5.

Abstract(67) PDF(1)

Abstract:
The effect of technical parameters on nitrogen content in vanadium carbonitride is investigated.The results show that the ratio of V₂O₃ to C is evident effect on the nitrogen content of products,and the nitrogen content could reach maximum if the carbon content is over 15%.The nitrogen content of pr...

Research on Residence Time of Panzhihua Ilmenite Particle in a Fluidized Bed with Inner Structural Parts

Chen Deming

2007, 28(4): 6-11.

Abstract(61) PDF(1)

Abstract:
The effects of apparent air velocity,feeding rate,particle diameter and gap of the baffles on the residence time and bed pressure drop of Panzhihua ilmenite particles are investigated in an experimental fluidized bed with inner structural parts composed of a series of horizontal baffles whose porosi...

Effect of N-V MicroaUoying on Strength and Toughness of Low Carbon Weathering Steel

Wang Bo, Wang Deyong, Liu Chengjun, Jiang Maofa

2007, 28(4): 12-16.

Abstract(69) PDF(1)

Abstract:
The weathering steel with N-V micralloying is produced in a vacuum induction furnace.The microstrueture was analyzed by metallographic microscope and TEM,and the strength and toughness of experimental steel is characterized by tensile test,impact test and fracture analysis.The results show that the ...

Research on V-N Microalloyed Steel for Offshore Oil Drilling Platform

Guo Hua

2007, 28(4): 17-21.

Abstract(71) PDF(1)

Abstract:
The V-N mieroalloying technology is applied in designing the chemical composition of E36 grade experimental steel for offshore oil drilling platform.The experimental steel is rolled according to TMCP,and its mechanical properties could satisfy the requirements of the nation standard GB712-2000《Struc...

Effect of Vanadium on Microstructure and Property of Fire- resistant Weathering Steel

Liu Qingchun, Zheng Zhiwang, Liu Yong

2007, 28(4): 22-28.

Abstract(45) PDF(1)

Abstract:
In order to investigate the influence of vanadium on the microstructure and properties of fire-resistant weathering steel,the effect of vanadium on CCT diagram,microstructure and tensile properties at both room temperature and high temperature up to 600℃with different kinds of hot-rolling process ar...

Numerical Simulation on Molten Steel Flow and Carbon Concentration Distribution in Ladle during RH Vacuum Degassing Process

Gao Aimin, Liang Juan, Ai Liqun, Zhang Xiang

2007, 28(4): 29-35.

Abstract(76) PDF(1)

Abstract:
According to the actual production condition of RH-MFB in one plant,the coupling mathematic model of molten steel flow and carbon concentration distribution in ladle is established by using the commercial code CFX.The flow characteristic of molten steel and variation of carbon concentration are inve...

Research on Secondary Cooling Technologies for Bloom Continuous Casting of High Vanadium and Nitrogenous Weathering Steel

Chen Yong, Yang Subo

2007, 28(4): 36-41.

Abstract(74) PDF(3)

Abstract:
Aim to optimize the secondary cooling scheme employed in continuous bloom caster for production of weathering steel for 310 Z-beam,which included the density of the secondary cooling and water distribution in secondary cooling zones,a series of improving measure was carried out.The improving measure...

Study on Contact Fatigue Damage of Steel Rail

Deng Jianhui, Wang Feilong, Wu Xiongxian, Ning Xiongxian

2007, 28(4): 42-47.

Abstract(67) PDF(2)

Abstract:
A test method of rail's contact fatigue is developed,which is different from the conventional test method and much similar to the true contact conditions on the practical rails.The simulated test for the anticontact-fatigue property of different kinds of rails is carried out,in which the velocity is...

Study on Roll Shape of Temper Mill for Hot-rolled Pickled Plate

Zhang Zhongping, Li Junhong

2007, 28(4): 48-51,66.

Abstract(58) PDF(3)

Abstract:
According to the technological conditions of hot-rolled pickled plate,a mathematic model is constructed to optimize the roll shape of temper mill,in which the distribution uniformity of the front tension in transverse and the contact pressure between mils is taken as the objective function.The model...

Study on Controlling Nitrogen of Wheel Steel Produced by BOF-LF-VD-CC Process

Guo Shangxing, Wang Jianjun, Zhou Li, Liu Yiqiang, Fan Dingdong, Shi Huaiyan, Jiao Xingli, Liu Qilong, Wang Guocai

2007, 28(4): 52-55,70.

Abstract(59) PDF(4)

Abstract:
According to conventional technological conditions of producing wheel steel at Ma'anshan Iron and Steel,the Variation of nitrogen content in the liquid steel was determined through industrial experiment.The results show that the main procedure of the nitrogen absorption in the LF→VD→CC process inclu...

Effect of Heat Treatment on Microstructure and Property of High Boron and Low Carbon Cast Steel

Shi Wenxiao, Fu Hanguang, Jiang Zhiqiang, Huang Liming, Xing Jiandong

2007, 28(4): 56-61.

Abstract(89) PDF(1)

Abstract:
A high boron cast steel with high strength and wear-resistant is obtained by adding 1.0% B to the low carbon steel whose carbon content is <0.2%.The effect of quenching temperature on the microstructures and properties of high boron cast steel is investigated.The results show that the unitary mar...

Computation on Temperature Fields of ESR Slab Ingot

Chang Lizhong, Li Zhengbang

2007, 28(4): 62-66.

Abstract(72) PDF(1)

Abstract:
An unsteady-state model of electroslag remehing (ESR) slab ingot is established,and the temperature field of slab ingot is calculated.The metal pool depth at different height of ingot is obtained with different melting velocity.The factors influencing the pool depth and the solidification behavior o...

Analysis on Causes of Cavity Defect for Hot Rolling Plate

Su Hezhou

2007, 28(4): 67-70.

Abstract(87) PDF(4)

Abstract:
The causes of cavity defect are analyzed and it is concluded that the unsuitable technological parameters during continuous casting are the main causes.The influence of casting speed,argon blowing flow and insertion depth of submerged nozzle on the distribution of gas bubble in mould is investigated...

Du Houyi

2007, 28(4): 71-74.

Abstract(71) PDF(3)

Abstract:

2007, 28(4): 75-77.

Abstract(50) PDF(1)

Abstract:

2007 Vol. 28, No. 4