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Cemented carbide/steel composite roller and preparation method thereof

A cemented carbide and composite roll technology, applied in metal rolling, metal rolling, rolls, etc., can solve the problems of low-temperature environment operation with low torque resistance and shear force, complex preparation process of composite rolls, etc., and achieve good oxidation resistance. , Enhance the anti-oxidation performance, the effect of reducing residual stress

Inactive Publication Date: 2009-03-18
HARBIN INST OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing composite rolls have complex preparation process, the product has low torque and shear resistance, and is only suitable for low-temperature environment operation, and propose a cemented carbide / steel composite roll and its preparation method

Method used

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  • Cemented carbide/steel composite roller and preparation method thereof

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specific Embodiment approach 1

[0010] Embodiment 1: In this embodiment, the cemented carbide / steel composite roll is made of a cemented carbide outer ring, a steel inner ring and pre-set brazing material.

[0011] The cemented carbide outer ring in this embodiment is made by powder metallurgy technology; because the surface layer of the cemented carbide outer ring contains more free carbon, which affects the wettability of the solder, grinding should be used to remove Free state carbon in the surface layer.

specific Embodiment approach 2

[0012] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the preset solder is composed of solder powder and binder in a volume ratio of 2:1-5. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the solder powder is composed of 5%-25% Cr, 2%-10% Si and Ni in the balance by mass percentage. Others are the same as in the second embodiment.

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Abstract

A hard alloy / steel compound roll and a preparation method thereof relate to a compound roll and a preparation method thereof, which solve the problems of the complex preparation process of the existing compound roll, the small torsion shear force resistance of products, and only being fit for operation in a low temperature environment. The hard alloy / steel compound roll is made from hard alloy outer ring, steel inner ring and preset solder. The preparation method comprises the following steps: 1. a base metal to be welded is cleaned; 2. solder powder is prepared; 3. binder is prepared; 4. the solder powder and the binder are evenly mixed and added to a welding seam; 5. the compound roll is obtained by welding an object to be welded which is added with the preset solder by the vacuum brazing method. The invention has the advantages of simple method, low production cost, short production period, and the product has the advantages of good antioxidation, adaptability to high-temperature environment work, high torsion shear force resistance which is up to 190-230MPa, good wear resistance and small residual stress.

Description

technical field [0001] The invention relates to a composite roll and a preparation method thereof. Background technique [0002] With the rapid development of my country's iron and steel industry, the metallurgical roll manufacturing industry is also growing, and the quality requirements for rolled materials are also continuously improving. However, because the overall technical level is still not high, there is a lack of core competitiveness. Products, the products of most enterprises hover at the low-end level. As a result, today's high-end roll products mainly rely on imports. According to statistics, almost all of the world's top-ranked roll manufacturers with an annual output of more than 20,000 tons have set foot in the Chinese market. Therefore, it is particularly urgent from the perspective of economic and technological independence to improve the roll manufacturing level of our country, especially the roll manufacturing technology of high-end products with independ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/02B23K35/30C09J101/02B23K1/00B23K1/20C23G1/00B08B3/12
Inventor 冯吉才岳鑫曹健张九海
Owner HARBIN INST OF TECH
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