Manufacturing process for producing cobalt-based alloy powder metallurgy by using simple substance ball milling method

A powder metallurgy, cobalt-based alloy technology, applied in the field of powder metallurgy manufacturing, can solve problems such as can only be used for other purposes or re-melting, high energy consumption, low yield and so on

Pending Publication Date: 2019-12-13
沈阳拓普新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems existing in the traditional production method of cobalt-based powder metallurgy alloys are: firstly, since it is necessary to smelt molten alloy steel with qualified composition according to the composition requirements, and then spray alloy powder with high-pressure argon or nitrogen gas, the energy consumption is high; Second, because the alloy powder sprayed with high-pressure argon or nitrogen can only be within a certain particle size range, that is, the alloy powder less than 40 μm can be used in powder metallurgy production, so the yield is low, and the yield is lower than 80%. Alloy powders greater than or equal to 40 μm can only be used for other purposes or re-smelted, and the material utilization rate is low; third, since the composition of the molten alloy steel and the alloy powder sprayed with high-pressure argon or nitrogen is fixed each time, for The material of the same brand cannot be fine-tuned in composition, which cannot meet the special needs of customers

Method used

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  • Manufacturing process for producing cobalt-based alloy powder metallurgy by using simple substance ball milling method
  • Manufacturing process for producing cobalt-based alloy powder metallurgy by using simple substance ball milling method
  • Manufacturing process for producing cobalt-based alloy powder metallurgy by using simple substance ball milling method

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specific Embodiment approach 1

[0081] Such as figure 1 As shown, the preparation process of cobalt-based alloy powder metallurgy produced by the simple substance ball milling method of the present invention adopts the following steps:

[0082] Step 1, Ingredients:

[0083] The cobalt-based alloy of the present invention is formed by the ratio of simple components, and the weight percentage content of each component is as follows:

[0084] Metal cobalt powder 40-65%; metal chromium powder 5-30%; metal tungsten powder 0-20%; silicon powder 0.1-4%; metal manganese powder 0.1-2%; metal molybdenum powder 0.1-30%; metal niobium powder 0-6%; metal nickel powder 0.1-8%; metal iron powder 0.1-10%; tungsten carbide powder 0-15%; chromium carbide powder 0.1-20%; niobium carbide powder 0-10%;

[0085] Step 2, Abrasives:

[0086] There are two methods of wet grinding or dry grinding for the abrasive material. The wet grinding means that grinding balls are installed in the barrel of the vertical stirring ball mill. a...

specific Embodiment approach 2

[0100] Same as Embodiment 1, the difference is:

[0101] The weight percentage content of each ingredient of the batching described in step 1 is as follows: 41.3% of metal cobalt powder, 16% of metal chromium powder, 14% of metal tungsten powder, 0.1% of silicon powder, 1.5% of metal manganese powder, 0.1% of metal molybdenum powder, metal niobium powder 1%, 3% metallic nickel powder, 2% metallic iron powder, 3% tungsten carbide powder, 15% chromium carbide powder, 3% niobium carbide powder; that is, it contains all 12 ingredients;

[0102] The ball-to-material weight ratio in the wet milling described in step 2 is 10:1, the rotating speed of the vertical agitating ball mill is 80 revolutions per minute, and the ball milling time is 5 hours, so that the particle size of the mixture reaches D50 and is 4 μm;

[0103] Glue blending and drying described in step 3, that is, put the mixed material after wet grinding in step 2 into the barrel of a vertical vacuum mixer, add 0.5% powd...

specific Embodiment approach 3

[0109] Same as Embodiment 1, the difference is:

[0110] The weight percentage content of each ingredient of the batching described in step 1 is as follows: 42.% of metal cobalt powder, 13% of metal chromium powder, 17% of metal tungsten powder, 0.5% of silicon powder, 0.5% of metal manganese powder, 1% of metal molybdenum powder, metal nickel 2% powder, 2% metal iron powder, 1% tungsten carbide powder, 20% chromium carbide powder, 1% niobium carbide powder; that is, it contains 11 kinds of ingredients except metal niobium;

[0111] The weight ratio of balls in the wet milling described in step 2 is 6:1, the rotating speed of the vertical stirring ball mill is 90 revolutions per minute, and the ball milling time is 8 hours, so that the particle size of the mixture reaches D50 of 3 μm;

[0112] The direct drying described in step 3 is to put the mixed material after the wet grinding in step 2 into the barrel of the vertical vacuum mixer, heat and distill after vacuumizing, and ...

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Abstract

The invention discloses a manufacturing process for producing cobalt-based alloy powder metallurgy by using a simple substance ball milling method. The manufacturing process overcomes the casting defects such as coarse crystal grains, pores, inclusions, and component segregation in the prior art by adopting a casting process and the problems of high energy consumption, low material utilization rate and incapability of component fine adjustment on materials of the same grade by adopting the alloy powder metallurgy method. The manufacturing process is characterized by adopting simple substance materials for proportioning, and directly carrying out granulation, shaping, sintering and inspection after grinding. The manufacturing process has the beneficial effects that the casting defects for producing a cobalt-based alloy by adopting the casting method are overcome, the obtained metallographic structure is finer, the phases are more uniformly distributed, the comprehensive performance is better, and the two procedures of smelting and powder spraying for producing the cobalt-based alloy by the alloy powder metallurgy method are omitted, so that the production efficiency is high, and theenergy consumption is low; all the powder can be pressed and sintered after the grinding materials are granulated, and the material utilization rate is more than 99%; and the components of the materials of the same grade can be finely adjusted, quick and small batch production can be achieved, and the special needs of customers can be met.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy manufacturing, and in particular relates to a preparation process for cobalt-based alloy powder metallurgy produced by a single-mass ball milling method. Background technique [0002] Cobalt-based alloy is a cemented carbide resistant to various types of wear and corrosion as well as high temperature oxidation. That is commonly referred to as cobalt-chromium-tungsten (molybdenum) alloy or Stellite alloy. Cobalt-based alloys are a class of alloys with cobalt as the main component, containing a considerable amount of nickel, chromium, tungsten, and a small amount of alloying elements such as molybdenum, niobium, tantalum, titanium, lanthanum, and occasionally iron. In the prior art, cobalt-based alloys, including Stellite alloys, are generally produced by casting methods, and a small amount of products are also produced by powder metallurgy methods, while traditional cobalt-based alloy po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F1/00C22C19/07C22C32/00C22C30/00C22C1/05C22C1/10
CPCB22F1/0003B22F9/04B22F2009/043C22C1/05C22C19/07C22C30/00C22C32/0052
Inventor 柳俊锋陈阳柳天聪
Owner 沈阳拓普新材料有限公司
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