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Composite load bearing board for powder metallurgy vacuum sintering furnace and manufacturing method thereof

A vacuum sintering furnace and powder metallurgy technology, applied in the field of powder metallurgy, can solve the problems of large fluctuation, large fluctuation of product size and low yield.

Active Publication Date: 2012-09-26
山东鼎成新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The material of the setter plate manufactured by the existing technology is mainly corundum-mullite, but due to the root cause of the chemical composition of its formula, there are the following defects: First, the pure corundum-mullite material, its The thermal conductivity is very low, resulting in uneven heating of powder metallurgy products placed on the setter, resulting in inconsistent sintering temperature, which is finally reflected in the relatively large fluctuation of product size; second, due to the addition of clay in the formula, it introduces Some oxide impurities, these impurities present a certain activity during the sintering process of powder metallurgy products, and thus have a certain reaction with the product, resulting in adverse consequences such as sticking, deformation and large size fluctuations; third, the existing setter plate is being pressed , sintering and orthopedic production processes, the finished product rate is relatively low; Fourth, due to the insufficient thermal shock resistance of the existing setter during use, the number of times of use is relatively low, only about 50 to 80 times

Method used

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  • Composite load bearing board for powder metallurgy vacuum sintering furnace and manufacturing method thereof
  • Composite load bearing board for powder metallurgy vacuum sintering furnace and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] As shown in the accompanying drawings, a composite setter plate for powder metallurgy vacuum sintering furnace includes a sintered corundum-mullite base plate 1 and a metal attachment plate 3, the corundum-mullite base plate 1 and the A transition layer 2 is provided between the metal attachment plates 3; in parts by weight, the corundum-mullite matrix plate 1 includes 80 parts of low-sodium corundum, 15 parts of high-purity fused mullite, and 3 parts of superactive Micropowder α-alumina, 2 parts of nano-SiO 2 ; Wherein, Na in the low-sodium corundum 2 The content of O is ≤0.1%; the purity of the high-purity fused mullite is greater than or equal to 95%, and the content of the glass phase is less than or equal to 5%;

[0039] The metal attachment plate 3 includes micron-sized low-carbon carbonyl iron powder; wherein, the weight percentage content of carbon in the micron-sized low-carbon carbonyl iron powder is less than or equal to 0.05%;

[0040] The transition layer...

Embodiment 2

[0064] This embodiment is basically the same as Embodiment 1, the difference is:

[0065] As shown in the drawings, according to parts by weight, the corundum-mullite matrix plate 1 includes 75 parts of low-sodium corundum, 15 parts of high-purity fused mullite, 5 parts of super-active micropowder α-alumina, 5 parts Nano-SiO 2 .

[0066] The transition layer 2 includes 47.5 parts of the corundum-mullite substrate 1 component and 47.5 parts of low-carbon carbonyl iron powder.

[0067] A method for manufacturing a composite setter for a powder metallurgy vacuum sintering furnace, comprising the following steps:

[0068] Step 1, the difference between batching and embodiment one is:

[0069] ① The raw materials of corundum-mullite substrate plate 1 are: low-sodium corundum accounts for 75 parts, high-purity fused mullite accounts for 15 parts, super-active micro-powdered α-alumina accounts for 5 parts, nano-SiO 2 5 shares;

[0070] ②The raw materials of the metal attachment ...

Embodiment 3

[0076] This embodiment is basically the same as Embodiment 1, the difference is:

[0077] As shown in the accompanying drawings, in parts by weight, the corundum-mullite matrix plate 1 includes 90 parts of low-sodium corundum, 5 parts of high-purity fused mullite, 1 part of super-active micropowder α-alumina, 1 part Nano-SiO 2 .

[0078] The transition layer 2 includes 49.5 parts of the corundum-mullite substrate 1 component and 49.5 parts of low-carbon carbonyl iron powder.

[0079] A method for manufacturing a composite setter for a powder metallurgy vacuum sintering furnace, comprising the following steps:

[0080] Step 1, the difference between batching and embodiment one is:

[0081] ① The raw materials of corundum-mullite substrate plate 1 are: 90 parts of low-sodium corundum, 5 parts of high-purity fused mullite, 1 part of superactive micro-powdered α-alumina, and 1 part of nano-SiO 2 1 share;

[0082] ②The raw materials of the metal attachment plate 3 include 99 p...

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Abstract

The invention discloses a composite load bearing board for a powder metallurgy vacuum sintering furnace and a manufacturing method thereof. The composite load bearing board comprises a corundum-mullite matrix plate and a metal attachment plate which are sintered into one whole body; a transition layer is arranged between the corundum-mullite matrix plate and the metal attachment plate; the metal attachment plate is arranged on the corundum-mullite matrix plate, so that the heat conduction efficiency is greatly improved; and the transition layer is arranged between the corundum-mullite matrix plate and the metal attachment plate, so that the adhesive force between the corundum-mullite matrix plate and the metal attachment plate is improved and the yield is improved. The composite load bearing board does not contain clay components, so that the influence on a powder metallurgy product cannot be caused; and the composite load bearing board has very good thermal shock resistance and the service life of the composite load bearing board is prolonged.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a setter used in a powder metallurgy vacuum sintering furnace. Background technique [0002] With the vigorous development of the powder metallurgy industry, setter plates are used in various fields of the powder metallurgy industry, such as the production of stainless steel powder metallurgy products by metal injection molding, and the production of zirconia ceramic products in the ceramic industry. The material of the setter plate manufactured by the existing technology is mainly corundum-mullite, but due to the root cause of the chemical composition of its formula, there are the following defects: First, the pure corundum-mullite material, its The thermal conductivity is very low, resulting in uneven heating of powder metallurgy products placed on the setter, resulting in inconsistent sintering temperature, which is finally reflected in the relatively large fluctuati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D5/00C04B35/66C04B35/101C04B35/622
Inventor 王东
Owner 山东鼎成新材料有限公司