钢铁钒钛

FORECAST ON NON-METALIC INCLUSIONS IN CONTINUOUS CAST SLAB AT PZH STEEL

ZHOU Yi-ping, YANG Su-bo, DAI Yun-ge

2002, 23(3): 1-4.

Abstract(15) PDF(1)

Abstract:
The forecast model for existing situation of non-metallic inclusions in continuous cast slab is established through combining the study method provided by other researchers with the investigating result of non-metallic inclusions in continuous cast slab at PZH Steel.The forecast results are identical with the actual distribution of non-metallic inclusions in continuous cast slab when the casting speed is low.

COMPUTERIZED SIMULATION OF FLOW AND HEAT TRANSFER IN INVERSE SOLIDIFYING MOLD

ZHENG Kun-can, LI Yi-ke, WU Wen-fei

2002, 23(3): 5-8,20.

Abstract(21) PDF(1)

Abstract:
The mathematical model which describes the flow and heat transfer in inverse solidifying mold was established. Base on the model, a series of study with computerized simulation was taken. The results give the solidifying law which has three stages, quickly thickening of solidification zone, equilibrium and quickly remelting respectively. By comparing the experiment data of strip thickness with the simulation ones, the validity of the model was confirmed.

RESEARCH ON PERFORMANCE OF SLAG WITH SMELTING TITANIFEROUS ORE AT MAGANG

SU Yun-long, WU Li-jun, SONG Can-yang

2002, 23(3): 9-16.

Abstract(18) PDF(1)

Abstract:
After the performance and the mineralogical structure of BF slag from No.1 and No.2 blast furnace at Magang and laboratory make-up slag samples were tested, the reasonable consists of the slag with smelting titaniferous ore was acquired. The mathematical model about the relation between the composition and the performance of the titaniferous slag were established.

TEMPERATURE FIELD TEST FOR IRON-BASED COMPOSITE REINFORCED BY IN SITU TiC

YANG Yi, FENG Ke-qin, SHEN Kai-zhi

2002, 23(3): 17-20.

Abstract(11) PDF(1)

Abstract:
The distribution of the temperature fields, which were tested when iron-based composites reinforced by in situ TiC were produced, were provided. By analysis of the tested temperature fields, it can be said that the reaction of Ti+C=TiC occurs due to heat quantity released by liquid metal and crystallization heat, when an iron-based composite reinforced by in situ TiC is produced.

STUDY ON STRUCTURE TYPE OF SUBMERGED ENTRY NOZZLE FOR BLOOM CONTINUOUS CASTING MOLD

WEN Guang-hua, TANG Ping, SU Zhen-jiang, GU Wu-an, ZHAO Ke-wen, SONG Guo-ju

2002, 23(3): 21-24.

Abstract(15) PDF(1)

Abstract:
The principles of design and evaluation for submerged entry nozzle (SEN) were put forward based on the view of establishing rational flow pattern in mold.On the base of water model experiment and numerical simulation,the reasonable structure type of SEN was obtained for the bloom continuous casting mold at PZH Steel. The SEN has four holes with upward angle.

STUDY ON WITHDRAWAL ROLL STRUCTURE PARAMETER OF UNDERGROUND HOT STRIP REEL

WANG Yong-qin, ZHU Ning, YAN Xing-chun, LIU Jian-ye, WAN Fei

2002, 23(3): 25-28.

Abstract(19) PDF(1)

Abstract:
Most of the underground hot strip reels, which are widely used in hot strip work, are importation or are made with introduced technique from overseas. The study on the design principle of hot strip reels is not deep-going. The selecting method for the diameter of withdrawal roll was discussed combining with the request of the national tackle key item. The calculation formulas of the diameters are provided in virtue of the elastic and plastic bending deformation theory. The calculated result turns out according with the practical evidence.

STUDY ON CONTINUOUS CASTING PROCESS OF LOW-ALLOY STEEL

GU Wu-an, JIANG Long, LI Zhong-chao, LI Mao-lin, ZHANG Jun-xiang

2002, 23(3): 29-32.

Abstract(20) PDF(1)

Abstract:
The problems, such as easily appearing slab surface crack and nozzle clogging in the continuous casting process of low-alloy steel, were solved through the studying on continuous casting velocity, second cooling model, mold powder, wire feeding operation of RE line and so on. The above-mentioned research is the basis for PZH Steel's 1350 slab caster to produce low-alloy steel?

RESEARCH ON HOT ROLLING TECHNOLOGY OF STAINLESS STEEL

ZHU Tao, Lü Jing-dong, LIU Yong, WEN Ya-cheng, YANG Jin-cheng

2002, 23(3): 33-35.

Abstract(15) PDF(1)

Abstract:
The hot rolling technologies of stainless steel were investigated by theoretical analysis and industrial experiment. The technological innovation with ordinary hot mills rolling stainless steel was achieved. The hot rolling process of stainless steel was developed at PZH Steel.

BEHAVIOR OF Al₂O₃ IN TITANIUM SLAG

ZHAO Zhi-jun, MA En-quan, LIAN Yu-jin

2002, 23(3): 36-38,43.

Abstract(6) PDF(1)

Abstract:
The behavior of Al₂O₃ in titanium slag was discussed by combining the production practice of electric-furnace with the theoretical basis of titanium slag smelting. It is concluded that the relative high Al₂O₃ content in titaniferous iron ore leads to increasing of the viscosity and the melting-point of high titanium slag, irregularity in furnace operation and technical-and-economic indexes depression. Besides, the relative high Al₂O₃ content in titaniferous iron ore also has negative influence on the enriching of TiO₂ and the operation of chloridizing process.

PRODUCTION OF SELF-LUBRICATED STEEL SHEET

ZHANG Kai-hua, GOU Shu-yun

2002, 23(3): 39-43.

Abstract(16) PDF(1)

Abstract:
The research and process of self-lubricated steel sheet in foreign are introduced. The composite of organic layer and production circumstance of the lubrication steel sheet abroad are presented. As a result, the suggestions to produce self-lubrication steel sheet at PZH Steel are brought up.

DISCUSSION ON TITANIUM SPONGE PRODUCTION PROCESS

GAO Jing, QU Nai-qin

2002, 23(3): 44-48.

Abstract(18) PDF(2)

Abstract:
The production processes of titanium sponge, such as, Kroll, Hunter, electrolytic method and FFC Cambridge' processes are introduced, especially FFC Cambridge' process. Comparing these processes, their different features can be found. In conclusion, every process is not perfect and need a long way to reach the peak.

APPLICATION OF CONTROL-COOLING TECHNOLOGY AFTER ROLLING IN MID-THICK STEEL PLATE MILL OF MAGANG

FENG Jian-hui, ZHANG Hui-yi

2002, 23(3): 49-53.

Abstract(16) PDF(1)

Abstract:
The influences of control-cooling technology after rolling on steel plate's tissue and performance are introduced. Some schemes using this technology in our country and abroad are presented. The plans, equipments, technological-specifications and effects applying tube laminar flow cooling technology are briefed.

USE OF INFRARED MONITORED CONTROL SYSTEM AT FURNACE TOP IN PZH STEEL

DIAO Ri-sheng, WANG Ge, LIU Chuan-sheng, WANG A-hu

2002, 23(3): 54-58.

Abstract(19) PDF(1)

Abstract:
By means of installing the infrared monitored control system at furnace top of 3 # and 4 # blast furnace, the visual photograph was acquired which is important for adjusting the blast furnace operation. It is convenient for monitoring the charge level and gas flow distribution in furnace. The obtained photograph is also useful in guiding the operation of upper stack and blast furnace well and dealing with the special conditions for blast furnace smelting.

ANALYSIS ON MEASUREMENT,APPLICATION AND RELIABILITY OF FLD

LU Guo-qing, QIU Xiao-gang, LUO Zhong-yun, CHEN Wen-long

2002, 23(3): 59-64.

Abstract(16) PDF(1)

Abstract:
FLD is usually measured with swell test in rigid die. The tested FLD is good fit that one measured by analogue computer in ASAME(Automated Strain Analysis and Measure Environment). When application FLD for analyzing the safety of formed parts and the selection of materials, the result is quite reliable where the deformation is mainly plane strain and swell, but unreliable for deep drawing parts.

2002 Vol. 23, No. 3