钢铁钒钛

Experimental Study on Leaching Vanadium by Sub-molten Salt Method

Cao Laizong, Liu Daijun, Gao Lihua, Liu Changhong, Shen Qian

2008, 29(2): 1-4.

Abstract(75) PDF(2)

Abstract:
Considering that the recovering V₂O₅ by roasting leads to some serious problems such as environment pollution,high energy consumption and low conversion efficiency at present,the influencing factors of leaching vanadium from ore with the composite sodium agent are studied in this paper by sub-molten...

Study on Thermochromic Properties of the Mo-doped VO₂ Thin Films on Muscovite Subtrate

Zhang Yue, Yan Jiazhen, Huang Wanxia, Liu Xiaojie, Tu Mingjing

2008, 29(2): 5-8.

Abstract(48) PDF(1)

Abstract:
In this paper,Mo-doped vanadium dioxide thin films were fabricated on muscovite slice using an inorganic sol-gel method.XRD,AFM,XPS and FTIR were used to investigate the microstructure,morphology and phase transition temperature.The results revealed that VO₂ film was(011) preferred orientated on mus...

Effects of Coiling Temperature on Microstructures and Mechanical Properties of Micro-alloyed Rephosphorized Steel Sheet

ZHENG Zhiwang, GOU Shuyun

2008, 29(2): 9-13.

Abstract(79) PDF(1)

Abstract:
Effects of coiling temperature(600、650 and 700 ℃,respectively) on the microstructures and mechanical properties of micro-alloyed rephosphorized steel sheet were investigated by analyzing its microstructures and mechanical properties in as hot-rolled and as annealed conditions as well as its recrysta...

Influence of Liquid Core Reduction on Mechanical Properties of High Strength Weathering Steels in Thin Slab Casting and Direct Rolling Process

SU Liang, TIAN Naiyuan, MAO Xinping, LIN Zhenyuan

2008, 29(2): 14-17.

Abstract(78) PDF(1)

Abstract:
Ti-microalloyed High Strength Weathering Steel was first produced by CSP process at Zhujiang Steel Co.,Ltd.,Effects of two different processes(with LCR or without LCR) on the mechanical properties and microstructure of the slab and strip were discussed.The results showed that all strips were of very...

Influence of Australian Ore on Microstructure of Sinter

LIU Lina, HAN Xiuli, BAI Limei

2008, 29(2): 18-22.

Abstract(59) PDF(1)

Abstract:
Ao mine and sinters were observed by optical microscopy.The results showed that the structure of Ao mine is loose,The primary compositions are hematite and limonite,existing as the xenomorphic granular state.While the Ao mine content of sinter increased from 10% to 50%,the content of calcium ferrite...

Effect of Welding Velocity on Properties of Welding Joint of Austenitic Stainless Steel

QIN Bin, WANG Baosen

2008, 29(2): 23-26.

Abstract(74) PDF(2)

Abstract:
The MIG welding research on 304 austenitic stainless steel plates with 3 mm thick was carried out.The results showed,fast welding velocity is benefit to enhancing joint's quality,because faster welding velocity may help to reduce the region of welding seam and heat affect zone.But too fast welding v...

Effect of V₂O₃ and Al₂O₃ Addition on Iron Carbide Formation

HE Qiang, LI Guangqiang, WU Shici, MA Jianghua

2008, 29(2): 27-31.

Abstract(61) PDF(1)

Abstract:
Iron carbide was produced by reacting of iron ore with(H₂+CH₄) gas mixture at 1 023 K.The effects of V₂O₃ and Al₂O₃ additives on iron carbide formation were experimentally investigated by thermogravimetry and XRD analysis.It was observed that the addition of V₂O₃ had significantly promoting effect o...

Analysis on Microstructure of Solidified Film of Casting Powder for Low-carbon Steel

HAN Xiuli, YANG Huiping, LIU Lina

2008, 29(2): 32-36.

Abstract(83) PDF(1)

Abstract:
The microstructures of accidental film and adjusted film for low-carbon steel have been studied,accidental reasons have been analysed,and the way is point out to improve performance of lubricity and heat conductivity of casting powder and quality of slab by controlling the solidified film structure ...

Physical Simulation of MetalSlag Mass Transfer in Gas Stirred Ladles

GAN Lei, HE Ping

2008, 29(2): 37-42.

Abstract(63) PDF(2)

Abstract:
The mass transfer of benzoic acid between water and oil has been performed to simulate the mass transfer processes of metallurgical reactions in gas stirred ladles, and effects of gas flow rate, slag volume, tuyere positions on mass transfer rate have been studied when the rate controlling process i...

Numerical Simulation of Mold Electromagnetic Stirring in 280 mm × 380 mm Bloom Continuous Casting

CHEN Yong, ZHU Miaoyong, CAI Kesen, YANG Xiaodong

2008, 29(2): 43-49.

Abstract(92) PDF(3)

Abstract:
In order to simulate the magnetic induction density and electromagnetic stirring force in 280 mm×380 mm continuous bloom casting mold,a mathematical model was presented according to Maxwell electromagnetic field theory.On this basis,the distribution of the magnetic induction density and electromagne...

Coupled Numerical Simulation on the Process of Molten Steel Flow and Heat Transfer of Six-strand Tundish

ZHANG Caijun, LI Jiansheng, CHENG Cuihua, BI Na

2008, 29(2): 50-54.

Abstract(69) PDF(2)

Abstract:
The method of coupled numerical was taken on the heavily temperature dropping of six-strand special unsymmetrical tundish.The flow field and temperature field in the tundish were calculated and optimized.The result show that when the special tundish was used without any flow control devices,it had a...

Analysis of Cracking Reasons in the Cold Heading Process of SWRCH35K Steel

LIU Zengxun, PEI Pei, AI Liqun

2008, 29(2): 55-59,66.

Abstract(91) PDF(3)

Abstract:
Cold heading steel is used to make the standard unit.The products tend to crack on the surface due to limited plasticity of materials.To improve properties of cold heading steel and product qualified rate,the cracking reasons of SWRCH35K bolt in the cold-heading process were investigated by acid was...

Influencing of Temperature on Plating Microstructure of Galvalume Sheet Steel

LI Dadong, LIU Jinyan, CHEN Wenlong

2008, 29(2): 60-66.

Abstract(70) PDF(1)

Abstract:
The change of plating microstructure was investigated by microscope and SEM,when the Galvalume sheet steel was tested in diverse high temperatures.It was showed the color of surface didn't change when temperature was in 300~450℃,but the Galvalume branching crystal cracks expanded larger and larger,a...

Analysis and Control on the Edge Cracking of Hot-Rolled Strips

CHEN Wei, SU Hezhou

2008, 29(2): 67-72.

Abstract(85) PDF(2)

Abstract:
The cause of edge cracking defect of hot-rolled strips was investigated and analyzed by metallographic microscope,SEM and process investigation.The results showed that bad deoxidization during smelting and the unstable casting operation are the main causes for continuous edge cracking of strips;The ...

2008 Vol. 29, No. 2