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Universal type coating for preventing adhesion in sintering of hard alloys having high, medium and low cobalt contents

A cemented carbide, high school technology, applied in the coating and other directions, can solve the problems of carburizing and decarburization, easy cracking and falling off, and deformation of cemented carbide products, so as to reduce the amount of product grinding, easy to brush and smooth, The effect of reducing production costs

Inactive Publication Date: 2019-03-29
ZHUZHOU CHAOYU INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of high-middle-low-cobalt cemented carbide sintered anti-sticking universal paint, to solve the following shortcomings of the existing paint proposed in the above-mentioned background technology: 1, the general paint is not easy to brush smooth, easy to crack and burn after brushing 2. The sintering process is easy to carburize, decarburize or deform the cemented carbide product; 3. The problem that the high, medium and low cobalt cemented carbide coating cannot be sintered for general purpose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The ratio of ingredients used is:

[0015] High-purity metallurgical carbon black: 11%;

[0016] Graphite phosphorus flakes: 4%;

[0017] Zirconia: 32%;

[0018] Polyethylene glycol: 3%;

[0019] Turkish red oil: 3%;

[0020] Tween: 4%;

[0021] Negative ion water: 27%.

[0022] The preparation process of the present embodiment comprises the following steps:

[0023] S1. Put high-purity metallurgical carbon black, graphite phosphorus flakes, zirconia, polyethylene glycol, Turkish red oil, Tween, and anion water into a stirring mixer in proportion to mix and stir;

[0024] S2, evenly brush the uniform suspension obtained after stirring in step A on the boat surface, brush once with low cobalt, brush twice with medium cobalt, and brush three times with high cobalt;

[0025] S3, placing the cemented carbide product on a boat for sintering.

Embodiment 2

[0027] The ratio of ingredients used is:

[0028] High-purity metallurgical carbon black: 14%;

[0029] Graphite phosphorus flakes: 3.5%;

[0030] Zirconia: 38%;

[0031] Polyethylene glycol: 3.5%;

[0032] Turkish red oil: 3.5%;

[0033] Tween: 3.1%;

[0034] Negative ion water: 30%.

[0035] The preparation process of the present embodiment comprises the following steps:

[0036] S1. Put high-purity metallurgical carbon black, graphite phosphorus flakes, zirconia, polyethylene glycol, Turkish red oil, Tween, and anion water into a stirring mixer in proportion to mix and stir;

[0037] S2, evenly brush the uniform suspension obtained after stirring in step A on the boat surface, brush once with low cobalt, brush twice with medium cobalt, and brush three times with high cobalt;

[0038] S3, placing the cemented carbide product on a boat for sintering.

Embodiment 3

[0040] The ratio of ingredients used is:

[0041] High-purity metallurgical carbon black: 12%;

[0042] Graphite phosphorus flakes: 2.5%;

[0043] Zirconia: 39%;

[0044] Polyethylene glycol: 2.5%;

[0045] Turkish red oil: 2.5%;

[0046] Tween: 3.5%;

[0047] Negative ion water: 28%.

[0048] The preparation process of the present embodiment comprises the following steps:

[0049] S1. Put high-purity metallurgical carbon black, graphite phosphorus flakes, zirconia, polyethylene glycol, Turkish red oil, Tween, and anion water into a stirring mixer in proportion to mix and stir;

[0050] S2, evenly brush the uniform suspension obtained after stirring in step A on the boat surface, brush once with low cobalt, brush twice with medium cobalt, and brush three times with high cobalt;

[0051] S3, placing the cemented carbide product on a boat for sintering.

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Abstract

Universal type coating for preventing adhesion in sintering of hard alloys having high, medium and low cobalt contents is disclosed. The coating includes, by mass, 10-15% of high-purity metallurgicalcarbon black, 2-5% of graphite flakes, 30-40% of zirconia, 2-5% of polyethylene glycol, 2-5% of Turkey red oil, 3-5% of Tween and 25-35% of anionic water. A manufacturing method of the coating includes S1) adding the high-purity metallurgical carbon black, the graphite flakes, the zirconia, the polyethylene glycol, the Turkey red oil, the Tween and the anionic water into a stirring vessel according to a ratio, and mixing and stirring the materials. The coating is advantageous in that 1) flat brush coating of the coating can be achieved easily without cracks or shedding after brushing; 2) a carbon content balance in a sintering process is ensured, a product is flat and free of deformation, product grinding is reduced and the production cost of the product is reduced.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a general anti-adhesive coating for sintered hard alloys with high, medium and low cobalt. Background technique [0002] The sintering temperature of cemented carbide is generally 1380 ° C ~ 1450 ° C. During the sintering process, the cobalt, nickel and other bonding metals in the cemented carbide are in a molten state, and the cobalt and nickel in the molten state will diffuse to the graphite boat, causing cemented carbide Product sticking boat, product deformation and so on. Therefore, a layer of paint needs to be applied between the cemented carbide product and the boat to isolate it. The paint cannot cause product seepage and decarburization, so as to ensure that the product is flat and not deformed after sintering, and it is easy to paint evenly. [0003] The existing coatings have the following disadvantages: 1. General coatings are not easy to be painted flat, and are ea...

Claims

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Application Information

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IPC IPC(8): C09D1/00B22F3/10
CPCB22F3/10C09D1/00
Inventor 张勇王立新曾强明
Owner ZHUZHOU CHAOYU INDAL
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