材料期刊网

钢铁生产流程的铁流对铁资源效率的影响

戴铁军 , 陆钟武

金属学报

提出了衡量钢铁生产过程中铁矿石等天然资源节约程度的重要指标------铁资源效率, 给出了生产流程的基准铁流图, 分析了偏离基准铁流图的各股铁流对铁资源效率的影响, 讨论了流程铁资源效率与工序铁资源效率之间的关系．以某钢厂年平均生产数据为例, 分析了生产流程的铁流对铁资源效率的影响.

关键词: 钢铁生产流程 , unit process , iron--flow

Average Unit Pressure Formula for ThreeRoll Tube Rolling

SUN Binyu , YUAN Shijian

钢铁研究学报(英文版)

According to the deformation characteristics of threeroll tube rolling, the existent disadvantages of traditional A Geleiyi and A Tselikov′s formulas were objectively analyzed. An assumption approximate to actual situation was put forward. After suitable simplification, the energy method was adopte...

关键词: energy method;unit pressure;velocity field

Failure analysis of corrosion cracking and simulated testing for a fluid catalytic cracking unit

Journal of University of Science and Technology Beijing

The failure of a fluid catalysis and cracking unit (FCCU) in a Chinese refinery was investigated by using nondestructive detection methods, fracture surface examination, hardness measurement, chemical composition and corrosion products analysis. The results showed that...

关键词: stress corrosion cracking;fluid catalytic cracking unit;dew point;failure

Evaluation of the corrosion resistance of thermal-spray coatings under oxidant atmosphere in a fluid catalytic-cracking unit

Oxidation of Metals

The effectiveness of several thermal-spray coatings for improving the corrosion resistance of a low-alloy steel was evaluated at 650degrees C under two conditions: an oxidizing atmosphere in a fluid catalytic-cracking regenerator of a petrochemical unit and a simulated...

关键词: thermal-spray coatings;diffusion;oxidation;sulfidation;internal;precipitation;mixed-gas environments;high-temperature;base alloys;scales;oxidation

Growth of Casting Microcrack and Micropore in Single-crystal Superalloys Analysed by Three-Dimensional Unit Cell

Jiansong WAN , Zhenzhou LU

材料科学技术（英文）

Finite element (FE) analysis was employed to investigate the casting microcrack and micropore growth in nickel-base single-crystal superalloys DD3. Based on the finite deformation rate-dependent crystallographic constitutive equation, the simulations of casting microcrack and micropore growth in thr...

关键词: Casting micropore , null , null , null

Melting Characteristics of Iron Ore Fine During Sintering Process

LI Hongge , ZHANG Jianliang , PEI Yuandong , ZHAO Zhixing , MA Zejun

钢铁研究学报(英文版)

The whole melting curve of iron ore during sintering process was obtained, and the melting characteristics of iron ore were defined and explained. The whole melting process of mixture, mixed by iron ore and CaO reagent at basicity of 20 ...

关键词: iron ore , sintering , melting characteristic , melting curve

EIS analysis on the anodic dissolution process of pure aluminum in an alkaline solution

Acta Physico-Chimica Sinica

The EIS of the anodic dissolution process of pure aluminum in an alkaline solution was fitted using expression of Faradic admittance previously proposed by Cao([11-12]), based on which the mechanism of the process was proposed. The result...

关键词: pure aluminum;alkaline solution;anodic dissolution;electrocal;impedance spectrum (EIS);analysis;impedance plane displays;air batteries;alloy anodes;stability;conditions;steady-state;corrosion;inhibition

NUMERICAL SIMULATION OF CASTING PROCESS

L.L. Chen , R.X. Liu and H.T. Lin College of Materials Science and Engineering , Huazhong University of Science and Technology , Wuhan 430074 , China

金属学报(英文版)

In this paper, the development status of casting numerical simulation technology is introduced. In additional, mathematical model, solution method, initial condition, boundary condition and defect predicting scheme of foundry process are also analyzed, which include th...

关键词: foundry , null , null , null , null

DEVELOPMENT OF BRAIDED-PULTRUSION PROCESS AND STRUCTURE-PROPERTY RELATIONSHIPS FOR TUBULAR COMPOSITES

J.H. Byun , S.-K.Lee and B.S. Kim (Korea Institute of Machinery and Materials , P.O. Box 41 , Changwon , Korea Manuscript received 26 August 1996)

金属学报(英文版)

In order to realize the potential of composite materials, it is imperative to develop a manufacturing process, to understand the microstructures, and to assess the structural performance of the composite. The braided-pultrusion process, w...

关键词: : braided pultrusion , null , null

Spin waves in several Heisenberg systems: Three-sublattice with different exchange constants (J(ab)=J(bc)not equal J(ca)) and a superlattice with the elementary unit of four or three different layers

Physical Review B

The quadratic Holstein-Primakoff spin-wave Hamiltonian for three-sublattice Heisenberg systems with different exchange constants (J(ab)=J(bc)not equal J(ca)) was diagonalized by a three-step procedure. The classical ground state was examined and the effects of quantum fluctuation on the ground state...

关键词: ferromagnetic superlattices;reorientation transitions;magnetic;superlattices;modes;temperatures;film