Iron alloy-based composite hard alloy roller and production method thereof

A technology of hard alloy and production method, which is applied in the field of rolls, can solve the problems of complex casting process of composite hard alloy roll rings, low metallurgical interface bonding strength, long production cycle, etc., achieve good toughness performance, and improve fracture resistance ability, the effect of increasing production

Active Publication Date: 2012-05-30
蓬莱市超硬复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the early 1980s, the Swedish Sandvik Company proposed the cast-in composite cemented carbide roll scheme, that is, the cemented carbide roll ring and the ductile graphite lining with high toughness were cast together to form a metallurgical combination. The casting type cast iron carbide composite roll has the following problems: the cast-in method composite carbide roll ring has complex process, low yield, long production cycle and high cost
The bonding strength of the metallurgical interface formed at the same time is low, and the interface between the two materials is prone to cracks, which is difficult to transmit large torque
The material selection requirements of the composite inner ring are strict, the versatility is poor, and it requires high technical support and large equipment investment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1, a ferroalloy-based composite cemented carbide roll is formed by pressing the metal powder constituting the cemented carbide outer ring and the metal powder constituting the ferroalloy inner ring through vacuum pressure sintering, and the cemented carbide outer ring is made of 69%-71% WC, 16%-18% Co, 12%-14% Ni, 0.3% mixed rare earth powder, wherein the mixed rare earth is composed of 50% Ce, 45% La, 3% Z r o 2 , 2%y 2 o 3 Composition; the iron alloy inner ring is made of 20% to 25% of TiC, 0.3% of Ni, 2.5% to 3.5% of Cr, 8.1% to 9.1% of W, 0.4% of C, 2% to 3% of Mo, and The amount is composed of Fe.

[0026]A kind of production method of ferroalloy-based composite cemented carbide roll is that according to the formula of cemented carbide outer ring, the ratio of raw material and alcohol is 5:1 by weight to volume. The present embodiment is WC140kg, Co35.4kg, Ni24kg, mixed rare earth 0.6 kg and 40 liters of alcohol, put them into a stirring ball mill and s...

Embodiment 2

[0027] Embodiment 2, a kind of ferroalloy-based composite cemented carbide roll and production method thereof, is on the basis of embodiment 1, and present embodiment is WC 140kg, Co32.4kg, Ni27kg, mixed rare earth 0.6kg and 40 liters of alcohol, dress Put it into the stirring ball mill and stir the ball mill for 3 hours, pass through a 300-mesh sieve, put it into a Z-type vacuum dryer to heat and vacuum dry, the drying temperature is 100°C, add the dried material to a gasoline rubber solution with a concentration of 12%, and the addition ratio It is 12% gasoline-rubber solution that adding 6-7 kilogram concentration is 12% gasoline-rubber solution for every hundred kilograms of materials, and the present embodiment is that 14kg of 12% gasoline-rubber solution is added to the dried material, stir evenly, vacuum in Z-type vacuum drier. Evaporate to dryness at a temperature of 100°C. Unload the evaporated material and pass it through a 60-mesh sieve, and put it in a bucket for la...

Embodiment 3

[0028] Embodiment 3, a kind of ferroalloy-based composite cemented carbide roll and production method thereof, is on the basis of embodiment 1, and present embodiment is WC 138kg, Co36kg, Ni 25.4kg, mixed rare earth 0.6kg and 40 liters of alcohol, dress Put it into the stirring ball mill and stir the ball mill for 3 hours, pass through a 300-mesh sieve, put it into a Z-type vacuum dryer to heat and vacuum dry, the drying temperature is 100°C, add the dried material to a gasoline rubber solution with a concentration of 12%, and the addition ratio It is 12% gasoline rubber solution that adding 6-7 kilogram concentration is 12% gasoline rubber solution for every hundred kilograms of materials, and the present embodiment is that 12kg gasoline rubber solution 12% is added to the dried material, stir evenly, vacuum in Z-type vacuum drier. Evaporate to dryness at a temperature of 100°C, unload the evaporated material and pass through a 60-mesh sieve, and put it in a barrel for later u...

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PUM

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Abstract

The invention discloses an iron alloy-based composite hard alloy roller and a production method thereof. The iron alloy-based composite hard alloy roller is formed by pressing metal powder forming a hard alloy outer ring and metal powder forming an iron alloy inner ring through vacuum pressing and sintering, wherein the hard alloy outer ring consists of 69 to 71 percent of WC, 16 to 18 percent ofCo, 12 to 14 percent of Ni and 0.3 percent of mixed rare-earth powder; and the iron alloy inner ring consists of 20 to 25 percent of TiC, 0.3 percent of Ni, 2.5 to 3.5 percent of Cr, 8.1 to 9.1 percent of W, 0.4 percent of C, 2 to 3 percent of Mo and the balance of Fe. The iron alloy-based composite hard alloy roller has the characteristics of reasonable formula, synchronous vacuum pressing and sintering, energy conservation, solution of iron-based alloy oxidation problem, integrated fusion of diffusion interfaces, safe and reliable combination, high abrasive resistance, good surface quality,high forming precision and good heat cracking resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of rolls, in particular to an iron alloy-based composite hard alloy roll. Background technique [0002] The successful application of cemented carbide rolls in high-speed wire rod finishing and pre-finishing mills has greatly promoted the development of cemented carbide in other hot rolling fields. Therefore, cemented carbide composite rolls have been developed and applied. Since the early seventies of the twentieth century, cemented carbide has been applied in ordinary wire rolling mills, finishing mills and bar finishing mills. This type of roll was designed in the form of a nested composite roll in the early days, that is, the integral carbide roll ring is set on the steel roll shaft body, and the rolling torque is transmitted through the friction force of the inner hole of the roll ring or the clamping force of the end face. This method relies on an alloy spring to transmit a sufficiently large locking...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16C22C29/08C22C38/44
Inventor 孙积海孙浩斌蔡世岩
Owner 蓬莱市超硬复合材料有限公司
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