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High-performance mold material and preparation method thereof

A mold material, high-performance technology, applied in other manufacturing equipment/tools, engine components, turbines, etc., can solve the problems of poor wear resistance of alloys, reduce the wear resistance of alloy molds, discount the service life of alloy molds, etc., to achieve High strength, poor wear resistance, eliminate uneven distribution, and improve wear resistance

Active Publication Date: 2019-11-26
昆山长鹰硬质材料科技股份有限公司
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AI Technical Summary

Problems solved by technology

[0002] The existing domestic WC-Co cemented carbide mold materials usually have high Co content. High Co content brings high strength and greatly reduces the wear resistance of the alloy mold, which will greatly reduce the service life of the alloy mold. The scope of use is very limited
[0003] The conventional WC-Co mold material has high Co content and coarse particle size, and the mixture produced by the conventional process is unstable, which sometimes leads to the existence of Co pool in the alloy mold and the wear resistance of the alloy is not good. Therefore, an ultra-fine grain The preparation method of high-strength and high-wear-resistant mold materials is particularly important

Method used

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  • High-performance mold material and preparation method thereof

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preparation example Construction

[0017] A method for preparing a high-performance mold material, comprising the following steps

[0018] Step 1: By mass parts: 18.88-19.42 parts of superfine WC, 80 parts of WC-10%Co composite powder, 0.3-0.5 parts of Cr 3 C 2 , 0.08-0.12 parts of carbon black, 0.2-0.5 parts of Re are put into a three-dimensional mixer and pre-mixed for 0.5-1h to obtain pre-mixed powder, then put the pre-mixed powder into a ball mill tank, add 90-150 parts of wet grinding medium (without water alcohol, n-hexane, acetone, etc.), 300-600 parts alloy ball high-energy ball mill (planetary ball mill, stirring ball mill), ball milling time 8-32h, speed 200-300r / min, to obtain the required mixture;

[0019] Step 2: The mixture obtained in step 1 is sintered by hot pressing, the sintering pressure is 30-60MPa, and the sintering temperature is 1350°C-1380°C to obtain a sintered workpiece;

[0020] Step 3: After cooling the sintered workpiece obtained in step 2, return to temperature at 700-900°C;

...

Embodiment 1

[0026] In terms of parts by mass: 18.88 parts of superfine WC (grain ≤ 400mm), 80 parts of WC-10%Co composite powder, 0.5 parts of Cr 3 C 2 , 0.12 parts of carbon black, 0.5 parts of metal element Re were pre-mixed in a three-dimensional mixer for 0.5 hours, then mixed with 90 parts of alcohol, 300 parts of alloy balls were mixed with high-energy ball milling for 8 hours, and the speed of rotation was 250r / min, and the mixture was hot-pressed and sintered. The sintering temperature is 1350°C, and the sintering pressure is 60MPa. After sintering, the workpiece is cryogenically cooled at -200°C for 2 hours, and returned to 700°C for 2 hours to obtain a high-performance mold material.

Embodiment 2

[0028] In terms of parts by mass: 19.22 parts of superfine WC (grain ≤ 400mm), 80 parts of WC-10%Co composite powder, 0.4 parts of Cr 3 C 2 , 0.08 parts of carbon black and 0.3 parts of metal element Re were pre-mixed in a three-dimensional mixer for 0.75h, then mixed with 150 parts of acetone, 400 parts of alloy balls and mixed with high-energy ball milling for 20 hours at a speed of 200r / min to obtain the mixture by hot pressing and sintering. The sintering temperature is 1370°C and the sintering pressure is 50MPa. After sintering, the workpiece is cryogenically cooled at -200°C for 2 hours, and then returned to 800°C for 2 hours to obtain a high-performance mold material.

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Abstract

The invention discloses a high-performance mold material and a preparation method thereof. The preparation method comprises the steps of pre-mixing the following components of, parts by weight, 18.88-19. 42 parts of ultrafine WC, 80 parts of WC - 10% Co composite powder, 0.3 - 0.5 part of Cr3C2, 0. 08 - 0.12 part of carbon black and 0. 2 - 0.5 part of Re, adding ad mixing a certain amount of ballmilling media and alloy balls for ball milling, carrying out hot-pressing sintering on a mixture prepared by ball milling, and carrying out copious cooling and warming up treatment on a sintered workpiece to obtain the high-performance mold material. According to the high-performance mold material and the preparation method thereof, the grain diameter of the WC and the addition mode of Co in theWC are changed, so that the problems that a Co tank exists and an alloy is poor in wear resistance are solved while the high strength of the alloy is ensured; and according to the method, the problemthat the distribution of Co is not uniform is solved, and the wear resistance is improved while the strength is be ensured.

Description

technical field [0001] The invention relates to a high-performance mold material and a preparation method thereof, belonging to the technical field of mold materials. Background technique [0002] The existing domestic WC-Co cemented carbide mold materials usually have high Co content. High Co content brings high strength and greatly reduces the wear resistance of the alloy mold, which will greatly reduce the service life of the alloy mold. The scope of use is very limited. [0003] The conventional WC-Co mold material has a high Co content and a coarse particle size, and the mixture produced by the conventional process is unstable, which sometimes leads to the existence of a Co pool in the alloy mold and the wear resistance of the alloy is not good. Therefore, an ultra-fine grain The preparation method of high-strength and high-wear-resistant mold materials is particularly important. Contents of the invention [0004] Objective: In order to overcome the deficiencies in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05B22F9/04B22F3/14B22F5/00
CPCB22F3/14B22F5/007B22F9/04B22F2009/043B22F2998/10C22C1/051C22C29/08B22F2003/248
Inventor 黄启君张义涛万小虎陈铭军谢慧
Owner 昆山长鹰硬质材料科技股份有限公司
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