YANG Wangyue ZHA NG Jishan CHEN Guoliang Beijing University of Science and Technology
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Beijing
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ChinaTIAN Shusen GENG Qingquan Fushun Steel Works
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Fushun
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Liaoning
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China
金属学报(英文版)
The fatigue-creep interaction behaviour of superalloy GH698 with different grain sizes has been studied at 700℃.The results show that three zones,F,C and FC,can be distinguished at the fatigue-creep interaction curves.In zones FC and C,the presence of alternative stresses inhibits the creep deformation process therefore delays the fracture of the alloy.This effect will be enhanced by grain refining.However,in zone F,grain refining exhibits an inverse ef fect under large alternative stresses.
关键词:
Ni-base alloy
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null
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null
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null
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null
LI Changsheng
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YANG Hua
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WANG Yanfang
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et al
钢铁研究学报(英文版)
Fe-3%Si steel strip was experimental produced by thin slab casting and rolling (TSCR) process in the laboratory. The microstructure and texture of hot rolled strip by different total reduction and rolling schedule was observed through EBSD technique and X-ray diffraction method. The changeable rule of texture density on the α、ε and γ, and fibers was analyzed. When the total reduction was increased from 82.9% to 97.1%，the gradient of microstructure and texture for A steel surface layer and center layer was found, {001}‹110› texture had higher intensity, and {001}‹110› texture was changed to{110}‹001›和{112}‹111›. The texture distribution with different reduction schedule for B steel was basically similar, but the Goss texture orientation density and volume fraction for B steel were higher, the hot rolling reduction schedule of C1 was effective to the formation of Goss texture. The research works were useful theoretical basis and reference data to develop electrical steel by thin slab continuous casting and direct rolling technology.
关键词:
Silicon steel;texture;hot rolling;thin Slab;Continuous casting and direct rolling
R.C.Yang
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K.Chen
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H.X.Feng
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H.Wang
金属学报(英文版)
Based on the analysis and processing on relative empirical formula and data, C-values in Larson-Miller (P) expression, P = T(C + lgt), have determined for pearlitic heat resistant steel 12Cr1Mo V and 15 CrMo (20. 62 and 20. 30). The simulation experiments of high temperature aging, heated from 1.5 to 873 hours, have been designed and performed for its verification. And in combination with published information and the present nearly quantitative works, it has further been verified that both the degradations of microstructures and mechanical properties show a good accuracy and practicability using the Larson-Miller parameter with the present determined C-values. Finally, the effects of carbon content on C-value are analyzed by the empirical electron theory of solids and molecules (EET).
关键词:
pearlitic heat-resistant steel
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null
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null
ZHANG Longqiang
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TIAN Naiyuan
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ZHANG Jin
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XU Anjun
钢铁研究学报(英文版)
Based on the requirement of compactivity, continuity, and high efficiency, and taking full advantage of cushion capability of flexible parts such as external refining in new generation steel plant, an output model of steel plant was established in terms of matching between BOF and caster. Using this model, the BOF nominal capacity is selected, the caster output and equipment amount are computed, and then the steel plant output is computed.
关键词:
steel plant;output;BOF;nominal capacity;caster;matching
S.A. Al-Aghbari and Z. W. Lu Ministry of Oil & Mineral Resources
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Republic of Yemen Thermal-Engineering Department
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Northeastern University
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Shenyang 110006
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China
金属学报(英文版)
A brief introduction to Arab countries, in respect of their locations, populations, areas and mineral resources, was given. The development of steel industry in Am6 countries in last two decades was staled as a whole. And the steel industries in Egypt, Qatar, Saudi Arabia, United Arch Emirates (UAE), Morocco, Libya, Joanal, Tunisia, Syria, Iraq, Algeria and Bahrain were analyzed separately. Some development problems faced by Arab steel industry, such as steel market, natural resources, manpower and finance, were pointed out.
关键词:
steel industry
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null
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null
Y.Z. Lan
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S. Zhang
金属学报(英文版)
Steel slag is a byproduct produced in large amounts in the steel-making process. It is an important resource that can be effectively utilized. An experiment was described in which steel slag was tested as an adsorbent for the removal of phosphorus from waste water. Phosphorus removal depended on the amount of steel slag added, the pH value, the contact time, and the initial concentration. Under laboratory conditions when the added slag was 7.5g/L, the contact time 2h, and the pH value was equivalent to 6.5, over 99% of the phosphorus was removed; the experimental data on steel slag adsorption of phosphorus in the water fitted the Freundlich isotherm model. Steel slag was found to be very effective in adsorbing phosphorus.
关键词:
steel slag
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null
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null
