Hard alloy and double-metal composite technique and device

A cemented carbide and composite process technology, applied in the field of cemented carbide and its bimetal composite material manufacturing process and equipment, can solve the problem that the composite interface cannot form a metallurgical bonding layer, the bonding interface cannot be fully fused, and the cemented carbide is expensive. and other problems, to achieve the effect of promoting material and energy exchange, excellent crystalline structure and low cost

Active Publication Date: 2008-04-30
丁家伟 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the principle of inlay casting, if a metallurgical bonding layer is to be formed between two materials, the inlay casting ratio must be greater than 10. When the inlay casting ratio is less than 10, the composite interface will not be able to form a complete metallurgical bonding layer, thus limiting the application field.
The cemented carbide currently used all uses a large amount of

Method used

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  • Hard alloy and double-metal composite technique and device
  • Hard alloy and double-metal composite technique and device
  • Hard alloy and double-metal composite technique and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: in Fig. 1, 10%-40% high chromium cast iron or improved high chromium cast iron containing following composition and percentage are used as the binding agent of cemented carbide:

[0022] (1) C 1.5-3.8%, Cr 15-27%, remaining Fe;

[0023] (2) C 1.5-3.8%, Cr 15-27%, Ni 0.4-2.5%, remaining Fe;

[0024] (3) C 1.5-3.8%, Cr 15-27%, Co 0.5-3%, Mo 0.4-3%, V 0.2-2%, remaining Fe;

[0025] (4) In the alloy of the above-mentioned components, an appropriate amount of rare earths such as cerium or lanthanum or yttrium and high-chromium cast iron and improved high-chromium cast iron alloys of rare earth alloys can also be added.

[0026] The cemented carbide particles containing the following components and percentages with a content of 90%-60% are used as the hard phase.

[0027] (1) WC particles 100%;

[0028] (2) TiC particles 100%;

[0029] (3) WC particles 70%-90%;

[0030] TiC particles 30%-10%;

[0031] (4) In the above-mentioned cemented carbide particles, ...

Embodiment 2

[0034] Embodiment 2: in Fig. 2, this equipment is made of casting mold 4 with refractory material, and electromagnetic induction heater 5 is installed outside casting mold 4, and the bottom of casting mold 4 is connected with water-cooled box base 6, in water cooling A water inlet pipe 8 is installed at the bottom of any side of the box base 6 , an outlet pipe 7 is installed at the top of any side of the water-cooled box base 6 , and a pouring insulation riser 1 is connected at the top of the mold 4 .

[0035] At the beginning of work, any cemented carbide 3 in the above components should be dried after surface cleaning and oxide removal, and a layer of 1-4mm thick cast iron powder 9 or Iron powder containing 2%-10% nickel or iron powder containing 10%-50% WC and other hard alloy particles or iron powder containing 2%-10% nickel or hard alloy particles containing 10%-50% WC Alloy particles, 2%-10% nickel, 2%-15% chromium and 1%-5% molybdenum and iron powder 9 of other alloys (...

Embodiment 3

[0037] Embodiment 3: In Fig. 3, the difference from Fig. 2 is that two or more cemented carbides 10 are installed in the mold 4, and the above-mentioned process can be repeated to realize simultaneous compounding of multiple cemented carbides. Other process and equipment are identical with embodiment 2. slightly.

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Abstract

The utility model relates to a composite art and apparatus for hard alloy and bimetal, wherein the hard alloy is made of C with the content from 1.5 to 3.8 percent, Cr with the content from 15 to 27 percent, high chromium foundry iron with the content Fe used as binder, WC or TIC particles by the powder metallurgy technique, wherein the C and Cr are both accounted for 10-40 percent, the rest is the high chromium foundry iron, the WC or the TIC has the content from 90 to 60 percent. The hard alloy proceed composite casting with the C with the content from 1.5 to 3.8 percent, the Cr with the content from 15 to 25 percent, the rest high chromium foundry iron and spheroidal graphite cast iron in the mould provided with an electro-magnetism induction heater outside. The recombination of two materials is achieved by directly heating to the hard alloy and base metal liquid via the induction heater in the process of casting. The hard alloy produced by the invention has better wetting property and less bulking difference to the base metal, and is capable of achieving good recombination with the base metal. The invention has the advantages of simple recombination technique, easy achievement of technique, good property of the recombination products and low manufacturing costs.

Description

technical field [0001] The invention relates to cemented carbide and its composite material, in particular to a cemented carbide containing Fe, Ni, Cr, Mo, Co and other alloys as binders and its bimetallic composite material manufacturing process and equipment. Background technique [0002] As a high wear-resistant material, cemented carbide is widely used in cutting tools, molds, chisels, geological drilling and metallurgical rolls due to its high hardness, high strength and high wear resistance. field. Traditional cemented carbide is made of cobalt as a binder and manufactured by powder metallurgy sintering process. Cobalt is a scarce strategic material with a high price. In recent years, due to the development of world industry, the demand for cobalt has been increasing, resulting in a global shortage of cobalt, and the price of cobalt has skyrocketed, causing the price of cemented carbide with cobalt as the main raw material to also rise sharply. The price of already ...

Claims

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Application Information

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IPC IPC(8): B22D19/16C22C1/04C22C37/06C22C29/06
Inventor 丁家伟丁刚
Owner 丁家伟
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