钢铁钒钛

Effect of Vanadium on Ferrite Grain Size after Rapid Cooling

Zhang Kaihua, Yong Qilong

2007, 28(3): 1-4.

Abstract(62) PDF(2)

Abstract:
The ferrite grain size and yield strength of the middle and low nitrogen vanadium steel are investigated after rapid cooling as rolled. The experimental results show that the ferrite grain size of vanadium steel is finer than that of base steel since the vanadium being dissolved in matrix. It can be...

Effect of Nitrogen on Structure and Property of Ultra-fine Austenitic Stainless Steel

Peng Bing, Liu Jing, Li Guangqiang, Zhang Xin

2007, 28(3): 5-10.

Abstract(101) PDF(2)

Abstract:
The structure and property of ultra-fine austenitic stainless steel with different content of nitrogen made by mechanical alloy (MA) and the spark plasma sintering (SPS) technology are investigated. The XRD-pattern show that sintered sample with nitrogen is composed of single austenite, while that w...

Research on Inclusion in 20MnSi Continuously Cast Billet

Cao Wei, Wang Yu

2007, 28(3): 11-13.

Abstract(68) PDF(1)

Abstract:
The behavior of the inclusion in 20MnSi continuously cast billet is studied by large sample electrolysis, metallographical observation, SEM and EDS etc. The amount, size, distribution, composition and source of the inclusion are investigated. The results show that the unreasonable tundish structure ...

Research on Inclusions in Al-killed Steel during LF Refining

Guo Yuming, Xu Zhongbo, Wang Haitao

2007, 28(3): 14-18.

Abstract(64) PDF(4)

Abstract:
To analyze the behaviour of inclusions in Al-killed steel during LF refining and the effect of Ca -treatment, samples were taken at 3 different periods which were 3 minutes after refining, after white slag formation and after Ca-treatment. The number, shape and composition of the non-metallic inclus...

Numerical Simulation of Removing Inclusion by Gas Curtain in Continuous Casting Tundish

Gao Aimin, Lin Lei, Ai Liqun

2007, 28(3): 19-23.

Abstract(95) PDF(2)

Abstract:
Gas-liquid-solid three phase flow of the inclusion removing through gas curtain is researched by numerical simulation in the FTSC tundish, whose structure is turbulence inhibitor adding dam. The results show that the gas curtain changes the flow characteristic and improves the inclusion removal, the...

Effect of Mo on Microstructure and Property of Fire-resistant Steel

Chen Jie, Pan Fusheng, Zuo Rulin, Li Cong, Dang Ying

2007, 28(3): 24-27.

Abstract(54) PDF(1)

Abstract:
The effect of Mo on the microstructure and property of fire-resistant steel is studied by means of dilatometer and transmission electron microscopy. It is found that the chief effect of Mo in fire-resistant steel is to promote bainite transformation to ensure the high temperature properties, therefo...

Morphology of Line Defect on Surface of 304 Stainless Cold Rolled Steel Sheet

Teng Tao, Chen Yinli, Zhao Aimin, Zhou Huan, Wang Shuying

2007, 28(3): 28-32,50.

Abstract(73) PDF(1)

Abstract:
The morphology of line defect on the surface of 304 stainless cold rolled steel sheet is studied. The microscopic morphology of the line defect is investigated by use of optical microscope and scanning electron microscope (SEM) for analyzing the microstructures of the continuously casting slab, hot ...

Influence of Mold Electromagnetic Stirring Structure on Internal Quality of Continuously Cast Bloom

Chen Yong, Yang Subo

2007, 28(3): 42-46.

Abstract(60) PDF(1)

Abstract:
To enhance the metallurgical results of mold electromagnetic stirring (M-EMS) in continuous casting of bloom, experiments for optimizing the structure of M-EMS are carried out. The operation shows that the magnetic induction intensity and bloom internal quality are obviously improved by increasing e...

Influence of Annealing Temperature and Time on Structure and Texture of Cold Rolled Non-oriented Silicon Steel

Luo Laihui, Li Yaohui, Xu Xiangqi

2007, 28(3): 47-50.

Abstract(77) PDF(2)

Abstract:
Considering the annealing technology of cold rolled non-oriented silicon steel, the effects of annealing temperature and time on structure and texture are investigated. The results show that the density of {100} texture drops obviously in the α line and grains get together from {112} < 110 > t...

Coupling Analysis of Casting Speed and Tundish Superheat and Controlling Secondary Cooling in Continuous Casting

Ji Zhenping, Liu Wenhong, Xie Zhi, Jia Guanglin, Lai Zhaoyi

2007, 28(3): 51-55.

Abstract(80) PDF(2)

Abstract:
A three-dimensional solidification heat transfer model has been developed to analyze the influence of casting speed and tundish superheat on solidification in continuous casting process. The virtual casting speed and tundish superheat are introduced as feed-forward control variables to determine the...

Study on Preparing W-doped Vanadium Dioxide Film by Inorganic Sol-gel Process

Liu Bianmei, Xiong Renjin, Jiang Dongmei, Zhang Huaifa, Yang Weizhong, Zhou Dali

2007, 28(3): 33-36.

Abstract(63) PDF(1)

Abstract:
W-doped vanadium dioxide film was prepared by dipping V-W commixed sol on surface of glass slide and reducing in hydrogen atmosphere. XRD and XPS were used to analyze the phase components of the film. Synthetic conditions of steady V-W commixed sol and W-doped VO₂ film were researched.Results show t...

Research on Direct Reduction of Vanadic Titanomagnetite

Xue Xun

2007, 28(3): 37-41.

Abstract(96) PDF(6)

Abstract:
The direct reduction behaviour of vanadic titanomagnetite is researched in laboratory. The influence of technological parameters on the degree of metallization is discussed, which include reduction temperature, reduction time, atmosphere and the carbon rate. The results show the reduction temperatur...

Development and Application of Casting Flux for Bloom Continuous Casting of Medium and Low Carbon Steel

Chen Tianming, Yang Subo, Wen Yongcai, Wang Qian

2007, 28(3): 56-61.

Abstract(79) PDF(1)

Abstract:
Based on the research works of home and abroad, a casting flux was developed according to the bloom continuous casting process of medium and low carbon steel at PZH Steel. The coordination of glasslike-crystal property, capacity of absorbing inclusions and carbon mixing technology of casting flux we...

Development of Raw Material for Cold Rolled Ribbed Bar

Su Hezhou, Zhang Weiqiang, Li Jinzhu, Wang Yuan

2007, 28(3): 62-68.

Abstract(68) PDF(1)

Abstract:
With the aim of improving the adaptability of raw material produced for cold rolled ribbed bar, a series of hot rolled rod coil was developed by optimizing the chemical composition and the cooling process of high speed rolling. The rolling yield of cold rolled ribbed bar was increased obviously afte...

2007, 28(3): 69-70.

Abstract(55) PDF(1)

Abstract:

2007 Vol. 28, No. 3