钢铁钒钛

Effect of Technological Parameters on Microstructures and Mechanical Properties of Low Carbon Steel in Thin Slab Continuous Rolling Process

Liang Xiaokai, Liu Qingyou, Zhang Jianping, Hu Xuewen

2006, 27(1): 1-5.

Abstract(78) PDF(1)

Abstract:
Combined with the technological characteristics of thin slab continuous rolling process,the effect of technological parameters,such as cooling rate,rolling temperature,and coiling temperature on microstructures and mechanical properties of low carbon Al-killed steels was studied.Optimization of tech...

Effect of Process Parameters on Continuous Cooling Transformation for V-Ti Microalloyed Steel

Wu Hongyan, Du Linxiu, Xue Wenying, Shen Kaizhao, Liu Xianghua, Wang Guodong

2006, 27(1): 6-11.

Abstract(64) PDF(2)

Abstract:
The continuous cooling transformation(CCT) diagrams of austenite non-deformation and 50% compressively deformed at 950 ℃ were constructed on the Gleeble-1500 thermomechanical simulator and by means of a combined method of microhardness measurement for a microalloyed steel include V and Ti.Optical mi...

Heating Behavior of Blast Furnace Slag Bearing High TiO₂ Under Microwave Irradiation

Chen Yan, Bai Chenguang, He Yizhu, Noboru YOSHIKAWA, Shoji TANIGUCHI

2006, 27(1): 12-16,20.

Abstract(80) PDF(3)

Abstract:
The blast furnace（BF） slag bearing high TiO₂ was processed under microwave irradiation in order to induce micro-cracks in it and to improve the grindability of the slag.During inducing crack in the slag,it was found that the slag could be effectively heated by microwave,and thermal runaway was occur...

Study on Impurity-absorptivity of Basic Tundish Covering flux

Sun Yongchao, Huang Jun, Wu Yonglai, Zhao Junxue

2006, 27(1): 17-20.

Abstract(72) PDF(1)

Abstract:
A kind of basic tundish covering flux was developed according to the phase diagram of CaO-SiO₂-Al₂O₃.The absorbing ability for Al₂O₃ inclusion of the basic tundish covering flux was compared with the acid and neutral tundish covering flux,it was founded that the basic tundish covering flux was of be...

Study on Extraction of V₂O₅ from Vanadium Ore by Roasting and Acid Leaching Process

Bin Zhiyong

2006, 27(1): 21-26.

Abstract(67) PDF(1)

Abstract:
The recovering of V₂O₅ by roasting in air—sulfuric acid leaching—P204 extracting—precipitate separation V₂O₅ with ammonium salt from the vanadium ore was tested.The results show that about 90% of the vanadium can be leached after roasted 1.5 h in air at 800 ℃ while the rate of <1.19 mm roastedore...

Influence of Calcium Content on Fluidity of Ca-treated Liquid Steel

Yuan Fangming, Wang Xinhua, Yang Xuefu

2006, 27(1): 27-32.

Abstract(159) PDF(4)

Abstract:
It is found that Ca-treated liquid steel can be cast at lower superheat. In order to ascertain the reason that the castability of Ca-treated liquid steel is improved and to find optimal range of calcium content,behavior of calcium in liquid steel was studied in terms of relationship between calcium ...

Microstructure and Impact Toughness of High Strength Pipeline Steel

Jiang Haitao, Kang Yonglin, Liang Zhengwei

2006, 27(1): 33-37.

Abstract(53) PDF(1)

Abstract:
The Charpy impact properties of high strength pipeline steel with different microstructure were investigated.Experimental results show that the high strength pipeline steel with acicular ferrite microstructure has higher ability to prevent impact cracking than that with ferrite pearlitic microstruct...

Effects of Carbon Content on Impact Wear Performance of High Vanadium High-speed Steel

Ma Zhizuo, Wei Shizhong, Long Rui, Zhang Yongzhen, Li Yan

2006, 27(1): 38-43.

Abstract(80) PDF(2)

Abstract:
Effect of carbon content,ranging from 1.76% to 3.65%,on the impact wear performance of high vanadium high-speed steel was studied using self-designing impact wear tester WM-1.The results show that when the carbon amount is lower than 2.3%,the matrix is ferrite,so the wear resistance of the high vana...

Study on Ultraviolet Visible Light Spectrum Characteristic of Nano- TiO₂ and Modified Polypropylene

Cao Jianjun, Guo Gang, Duan Xiaoping, Wu Jianchun, Tu Mingjing

2006, 27(1): 44-49.

Abstract(61) PDF(1)

Abstract:
The polypropylene modified by rutile type nano-TiO₂ was degraded by accelerated aging test with high pressure mercury-arc lamp.The ultraviolet and visible light spectra of some samples were analyzed with ultraviolet and visible light spectrophotometer,such as nano-TiO₂,nano-TiO₂/polypropylene compos...

Study on Effect Factors for Antibacterial Property of TiO₂ Powder Doped with Ag⁺

Yin Xiaomin, Cheng Yongqing, Xu Jie

2006, 27(1): 50-54.

Abstract(54) PDF(1)

Abstract:
Pure TiO₂ powder and Ag⁺ doping TiO₂ powder were prepared by sol-gel process.The effect of UV illumination time,light source,Ag⁺ ratio in powder and different experimental bacteria on antibacterial property of Ag-TiO₂ powder was investigated by agar hole diffusion-inhibition zone method.The effect o...

Preparation and characterization of VO₂ Nano- powder by Thermal Decomposing VOC₂O₄·H₂O

Lin Hua, Zou Jian, Li Qing

2006, 27(1): 55-58,63.

Abstract(119) PDF(6)

Abstract:
A method of synthesizing VO₂ nano-powder by decomposing VOC₂O₄·H₂O（which was made from commercial V₂O₅ powder deoxidized by oxalic acid） in vacuum oven pipe at 350 ℃ was developed.The powder was characterized by means of thermal analysis（TG-DSC）,X-ray diffraction spectroscopy（XRD）,transmission elect...

Preparing VO₂ Powder using Leach Solution of Vanadium Slag

Yang Dongmei, Peng Mingfu, Zhu Shengyou, Hua Yixin

2006, 27(1): 59-63.

Abstract(64) PDF(2)

Abstract:
Based on the actual state of PZH steel, VO₂ powder was prepared using the leach solution of vanadium-bearing slag as raw material for the first time.The preparing process includes removing the impurity of leach solution, hydrolytic precipitation and calcining the precipitated material at high temper...

Determination of Iron in Nano-TiO₂ by 1,10-phenanthrolin Spectrophotometry

Zheng Xiaomin, Wang Xuemei, Yang Ping

2006, 27(1): 64-67.

Abstract(74) PDF(1)

Abstract:
A determination method of iron content in nano-TiO₂ was presented,in which the sample was dissolved into sulfuric acid and ammonium sulfate,the titania ion was masked by ammonium tartrate.The 1,10-phenanthrolin reacted with Fe²⁺ to form a stable orange-red complex in the medium of CH₃COOH—CH₃COONa(p...

2006 Vol. 27, No. 1