Web Of Tech

Cutting Test of Cemented Carbides Prepared by Using a New Carbusintering Technique

ZHANG Qi-xun

Rare Metals and Cemented Carbides | Vol., Issue 3, 1995 | pp. 19-22

This paper describes the cutting test of hard alloy tip produced by using the new carbusintering technique. This type of tips has presented a good wear resistance equal to that of typical cemented carbides YG6 tips when cutting austenitic stainless steel, nodular cast iron and chilled cast iron.

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A Study on Mo-Co Alloy Wire

CHENG Jun;LIU Xin-yu;ZHANG Hou-an

Rare Metals and Cemented Carbides | Vol., Issue 3, 1995 | pp. 22-25

The effects of cobalt on the reduction of molybdenum powder and mechanical properties of annealed Mo wire were investigated. The results show that the adding of cobalt benefits the reduction of MoO3and increases the density of sintered molybdenum bar. It also shows that cobalt can decrease the recrystallization temperature of molybdenum wireand distinctly improve the ductility of annealed molybdenum wire.

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Preparation of Refractory Metal Compounds by Mechanical Alloying

ZHANG Qiao-xin;WANG Sheng-rui;MAO Tian-er

Rare Metals and Cemented Carbides | Vol., Issue 3, 1995 | pp. 26-28

The characteristic of mechanical alloying (MA) is described in this paper: emphasis is given to the study of the process and mechanism of refractory compounds made by MA. We consider that it is an effective method to make the refractory compounds by MA.

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Study of the Application of W Electrode in Molten-salt Electrolysis of Nd

LIU Hui

Rare Metals and Cemented Carbides | Vol., Issue 3, 1995 | pp. 29-31

W electrode is used instead of the imperfect Mo electrode in the molten-salt electrolysis of Nd. The fabrication steps and connection method of W electrode is investigated.

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Effect of Organic Acid as Buffer Media on the Colour of RE-Arsenazo-Ⅲ

LI Yong-xiu;HE Xiao-bin;HU Ping-gui;GU Zi-ying

Rare Metals and Cemented Carbides | Vol., Issue 3, 1995 | pp. 31-34

Effect of three organic acid solutions(formic acid acetic acid and chloroacetic acid) on the colouring property of RE-Arsenazo-Ⅲ isinvestigated comparatively. Results show that formic acid is the bestselection as the buffer media for the determination of RE by arsenazoⅢ colouring.

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Application of Phosphonazo Developer in the Analysis of Metals and Alloys

DUAN Qun-zhang

Rare Metals and Cemented Carbides | Vol., Issue 3, 1995 | pp. 34-41

The latest development of application of phosphonazo developer in the analysis of metals and alloys is described. Colouring reaction conditions. something about the inspection limit. interference and measuring scope of the related spectrophotometry are presented in the paper.

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Research & Development of Rare Earth Chemicals Ⅲ──Pharmaceutical & Agricultural Products

ZHANG Wen-pu

Rare Metals and Cemented Carbides | Vol., Issue 3, 1995 | pp. 41-45

Applied study and development of elements such as W, Mo,Ge, Se in the fields of medical treatment and aggriculture are described with 20 references.

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Properties and Applications of T-type Cemented Carbide for Rock Drilling

ZHOU Jian-hua;SUN Bao-qi

Rare Metals and Cemented Carbides | Vol., Issue 3, 1995 | pp. 45-49

The technological process and characteristics of T-type cemented carbide for rock drilling are described. and its performance & application are also presented. Practice shows that the said cemented carbide is characterized by good physical/mechanical performance, great strength,high hardness and better wear-resistance.

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New Development of Hardmetals with Iron and Nickel-based Binders

ZHANG Yu-hua;ZHANG Ji-sheng

Rare Metals and Cemented Carbides | Vol., Issue 3, 1995 | pp. 50-57

The present status and development of hardmetals with iron and nickel-based binders are reviewed in this paper The properties ofhardmetals with iron and nickel binders WC-Co hardmetals are compared with WC-Co harmdetals. It shows that WC-Co hardmetals could be replaced by iron/nickel-based hard metals in some fields.

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