Preparation of RE Polishes From RE Chloride

CHENG Yao-geng;CHEN Jian-she;WEI Xu-jun

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 9-13

Study is made of the effects of roasting temperature, roasting time, fluoration and different intermediates on the properties of RE polishes from RE chloride. The properties of obtained RE polishes are indicated by particle analyzer, SEM,XRD. The results show that the following process is more for RE polishes (NH4)2SO4 precipitation followed by NaOH conversion,fluorating and 3 h roasting of the intermediate at 900 ℃

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Study of Forge Deformation and Microstructure on Steel-Bonded Cemented Carbides

WANG Che;YANG Bo;ZHOU Mei-ling

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 13-17

In this paper, the effects of forge deformation on the microstructres and properties of steel-bonded cemented carbides have been studied. The results show that the use of die forging is suitable for processing the steel-bonded cemented carbides. The use of die forging can not only refine the structure, but also make up for the defects in the process of free forge. It improves forge efficiency and proportion of finished products.

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Study on Compounding Process for a Steel-based As-cast Ceramal

HE Xu-chu;CHEN Guo-wei;DING Yun-yuan;TIAN Shu-sheng;TANG Yun-xing;WU Jin-feng;CAO Xiang-rong

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 17-21

This paper describes a study on the commercial possibility of compounding a steel-based as-cast ceramal. Factors of the compounding process has been analysed. This paper indicates that a key for producing the steel-based as-cast ceramal is to assure better liquidity of a melted steel entering prefabricated layer of the ceramal.The use of additives for this can give better result.Keyworks:steel-based; as-cast ceramal compounding process

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Experimental Study on Different Kinds of Synthetic Rubber Used as Forming Agent of Cemented Carbide

WU Yu-shuang;SUN Bao-qi;WU Guo-long

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 21-24

The feasibility of using butadiene styrene rubber and butadiene rubber as forming agent of cemented carbide has been studied. The experiments have shown that this two kinds of synthetic rubber can take the place of butyl sodium rubber and can be used as forming agent for the production of cemented carbide.

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Investigation on TiNiLaZr Alloy Film Coated by Magnetron Sputter and Their Electro-chemical Property

ZHANG Dong-ming;ZHANG Qiao-xin

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 25-27

In this paper, the Tio. 56Ni0. 37La0. 02Zr0. 05 and Tio. 53Ni0. 38La0. 09 alloy film was made by magnetron sputter. The results show that the maximum electro-chemical capacity of the former is 243mAh/g, about 30% higher than the latter.

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Study of Performance of RE A356 Electrophoretic Coating Film

WANG Bing;LIU Shu-zhen

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 27-32

Study is made on the influence of RE content in RE A356 alloy on the physical /chemical properties of A356 alloy cathode-electrophoretic coating film. The resutts show that addition of some rare earth can result in fine alloy structure, higher surface finish, easy phosphating. And the resultant phosphating film features good density, flexibility and electrophoretic coating ability. Optimum content of RE is 0. 05%.

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Study of Processability of Low-Re Mo Alloy

LIU Sha

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 33-36

The processability of low-Re Mo alloy manufactured by PM is studied. It was observed that the tensile strength and initial recrystallization temperature of the said alloy were increased wiht the incresae of Re content. The relation between tensile strength and annealing temperature conformed to linear regressing equations for the wire specimens with 1%,3%,and 5% Re at 900 to 1400℃ annealing temperatures.

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Investigation into the Common Quality Defect in the Processing of W-Ce Ingot

ZHANG Wen-lu

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 37-39

Brief description and analysis are made with respect to the quality defects (ie cracks, split and corewrapping) during W-Ce ingot processing. Preliminary investigation is made into the ways to prevent the defects and to improve the product quality.

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One Pot Synthesis of Tribenzyl Isocyanurate

CHEN Guo-bin;REN Bi-ye

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 40-42

In this paper one pot synthesis of tribenzyl isocyanurate from urea was studied. First isocyanuric acid w36 prepared from urea by liquid phase method and was not further separated, and then it continued to react with benzyl chloride and triethylamine to give tribenzyl isocyanurate. The reaction conditions and the effects of several factors on the yield were also discussed.

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Application of Rhodamine 6G in Photometric Analysis of Metal and Alloy

DUAN Qun-zhang

Rare Metals and Cemented Carbides | Vol., Issue 1, 1998 | pp. 43-47

In present paper, the recent advance of the application of Rhodancine 6G in photometric analysis of metal and alloy is reviewed. The conditions, systems limit and range of determination. and application of these methods are also discussed.

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