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Forming agent suitable for spray granulation of high-specific-gravity tungsten alloy powder as well as preparation method and application of forming agent

A technology for spray granulation and forming agent, which is applied in the field of powder metallurgy technology, can solve the problem that the forming agent cannot realize the spray granulation process, etc., and achieves the improvement of bulk density and fluidity, excellent quality of finished products, and improvement of powder lubricity. Effect

Active Publication Date: 2021-09-28
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the simple molding agent cannot realize the spray granulation process, the present invention provides a molding agent suitable for spray granulation of high specific gravity tungsten alloy powder and its preparation method and application, adding stearic acid and propylene glycol block into the formula Polyether and sodium polycarboxylate, after spray granulation, the bulk density can reach above 4.0, the fluidity can reach within 14S, and the powder performance is better

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  • Forming agent suitable for spray granulation of high-specific-gravity tungsten alloy powder as well as preparation method and application of forming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A molding agent suitable for spray granulation of high specific gravity tungsten alloy powder, which consists of the following components: by weight, 45 parts of polyvinyl alcohol (PVA), 35 parts of polyethylene glycol (PEG6000), stearic acid (SA) 7 parts, 6 parts of propylene glycol block polyether, 7 parts of sodium polycarboxylate, the solvent used is distilled water, and the forming agent aqueous solution with a mass concentration of 12% is prepared.

[0019] The preparation method of above-mentioned molding agent is:

[0020] 1) Weigh polyvinyl alcohol (PVA), polyethylene glycol (PEG6000), stearic acid (SA), propylene glycol block polyether, sodium polycarboxylate and distilled water in proportion;

[0021] 2) Pour polyvinyl alcohol (PVA) and polyethylene glycol (PEG6000) powder into a container of distilled water, heat the container to 90°C in a water bath, keep it warm for 60 minutes and stir to dissolve the two powders in the distilled water;

[0022] 3) Stear...

Embodiment 2

[0027] A molding agent suitable for spray granulation of high specific gravity tungsten alloy powder, which consists of the following components: by weight, 55 parts of polyvinyl alcohol (PVA), 27 parts of polyethylene glycol (PEG6000), stearic acid 6 parts of (SA), 6 parts of propylene glycol block polyether, 6 parts of sodium polycarboxylate, distilled water as a solvent, and an aqueous solution of a forming agent with a mass concentration of 12%.

[0028] The preparation method of above-mentioned molding agent is:

[0029] 1) Weigh polyvinyl alcohol (PVA), polyethylene glycol (PEG6000), stearic acid (SA), propylene glycol block polyether, sodium polycarboxylate and distilled water in proportion;

[0030] 2) Pour polyvinyl alcohol (PVA) and polyethylene glycol (PEG6000) powder into a container of distilled water, heat the container to 95°C in a water bath, keep it warm for 30 minutes and stir to dissolve the two powders in the distilled water;

[0031] 3) Stearic acid (SA)...

Embodiment 3

[0036] A molding agent suitable for spray granulation of high specific gravity tungsten alloy powder, consisting of the following components: by weight, 65 parts of polyvinyl alcohol (PVA), 17 parts of polyethylene glycol (PEG6000), stearic acid 6 parts of (SA), 6 parts of propylene glycol block polyether, 6 parts of sodium polycarboxylate, distilled water as a solvent, and an aqueous solution of a forming agent with a mass concentration of 12%.

[0037] The preparation method of above-mentioned molding agent is:

[0038] 1) Weigh polyvinyl alcohol (PVA), polyethylene glycol (PEG6000), stearic acid (SA), propylene glycol block polyether, sodium polycarboxylate and distilled water in proportion;

[0039] 2) Pour polyvinyl alcohol (PVA) and polyethylene glycol (PEG6000) powder into a container with distilled water, place the container in a water bath and heat to 92°C, keep it warm for 40 minutes and stir to dissolve the two powders in the distilled water;

[0040] 3) Stearic a...

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Abstract

The invention relates to a powder metallurgy process, and provides a forming agent suitable for spray granulation of high-specific-gravity tungsten alloy powder aiming at the problem that a simple forming agent cannot realize a spray granulation process. The forming agent comprises the following components of polyvinyl alcohol, polyethylene glycol, stearic acid, propylene glycol block polyether and sodium polycarboxylate, and a solvent is distilled water. The invention further provides a preparation method and application of the forming agent. According to the forming agent disclosed by the invention, in a high-specific-gravity tungsten alloy spray granulation process, the powder performance is simple and controllable, and the flowability, the apparent specific weight and the pressing performance of the powder are excellent.

Description

technical field [0001] The invention relates to a powder metallurgy process, in particular to a forming agent suitable for spraying granulation of high specific gravity tungsten alloy powder and its preparation method and application. Background technique [0002] High-density tungsten alloy materials are generally composed of tungsten, iron, cobalt, nickel, copper and other elements, and are generally produced by powder metallurgy. The powder metallurgy process requires granulation of the powder before molding. The quality of granulation directly affects the product. The spray granulation process is suitable for the granulation of large batches of products. It has the characteristics of high production efficiency, good powder fluidity, and good powder batch stability. However, the spray granulation process has high requirements for the forming agent, and the forming agent If it is not suitable, it will seriously affect the spray granulation process and the stability of the ...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/02B22F9/04C22C27/04
CPCB22F9/04B22F9/026C22C27/04B22F2009/043
Inventor 裘利铭包炳峥
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD