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Aging Effect on Configuration of Dislocations in Parent Phase of a Thermomechanically Trained Cu-Zn-Al Alloy

Qingan ZHANG and Jiasheng GAO (East China Institute of Metallurgy , Ma'anshan , 243002 , China)Nanju GU and Fuxing YIN (Hebei Institute of Technology Tianjin , 300130 , China)(East China Institute of Metallurgy , Ma'anshan , 243002 , China)

材料科学技术（英文）

With electron microscopic investigation, the configuration of dislocations in an aged Cu-25,72Zn4.21Al (wt-%) shape memory alloy was found to be in the form of superdislocations and their jogs, which were different from the preferential dislocations regularly aligned in an unaged alloy. These defects generated during aging treatment were considered to be responsible for low fatigue life

关键词:

Silicon Transmission in Blast Furnace

MI Keqin ** East China Institute of Metallurgy , Ma'anshan , Anhui , 243002 , China.

材料科学技术（英文）

Based on thermodynamic calculation,oper- ating data and experiments,Si transmission in B.F. is described in this paper.The Si in hot metal is con- trolled by both reduction and reoxidation.Equilib- rium calculation gives a tapping value and the pro- file of Si content of the hot metal in B.F.The first important factor to control Si content is reaction temperature.The coke reactivity and solution loss are more sensitive to in-situ coke reduction and Si content.

关键词: Si-content , null , null

Crossed Micro-bands in the Martensite Variant Pairs of a Thermomechanically Trained Cu-Zn-Al Alloy

Qingan ZHANG and Nanju GU (Hebei Institute of Technology Tianjin , 300130 , China)(East China Institute of Metallurgy , Ma'anshan , 243002 , China)

材料科学技术（英文）

The crossed micro-bands in the martensite variant pairs of a thermomechanically trained Cu25.66Zn-4.02Al (wt-%) alloy have been studied. It was found that the micro-bands pass through the interface from one martensite variant to another and their orientation inside different variants is distinct, which would remain in the parent phase after the reverse transformation and play an important role in the formation of preferential martensite. In fact, the crossed micro-bands are micro-twins for accommodating the stress fields generated during thermomechanically training

关键词:

Reduction and Reoxidation of Silicon in Blast Furnace Hearth

MI Keqin ** East China Institute of Metallurgy , Ma'anshan , 243002 , Anhui , China

材料科学技术（英文）

This paper introduces both laboratory experi- ment and equilibrium calculations concerned with the Si reduction and reoxidation.The results give evidence that the Si transport in different directions just exists in the furnace hearth synchronistically, by which the desulphurization is also affected.The problems noticed for smelting tow Si pig iron are given.

关键词: blast furnace , null , null , null

EQUILIBRIA OF Sr,Ba AND O,S IN LIQUID Fe

YUE Kexiang DONG Yuanchi East China Institute of Metallurgy , Ma'anshan , China

金属学报(英文版)

The equilibrium constants between Sr-O,Ba-O and Sr-S,Ba-S in liquid iron at 1570℃ and the interaction coefficients concerning these elements have been determined as follows: K_(Sro)=1.897×10~(-7),e_O~(Sr)=-43.8 K_(BaO)=8.204×10~(-8),e_O~(Ba)=-98.0 K_(SrS)=8.356×10~(-7),e_S~(Sr)=-3.9 K_(BaS)=4.083×10~(-7),e_S~(Ba)=-3.5

关键词: equilibrium , null , null , null , null

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