Forming agent for hard alloy production

A technology of cemented carbide and forming agent, which is applied in the field of forming agent for cemented carbide production, and can solve problems such as poor fluidity, difficult quality control, troublesome preparation, etc.

Inactive Publication Date: 2012-04-18
株洲长江硬质合金工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"A molding agent for cemented carbide production" (200810143025.1) disclosed that it consists of 40-55% polyoxyethylene stearate, 10-15% dioctyl phthalate, and 50-30% hydrogenated An improved molding agent composed of rosin, but the hydrogenated rosin in the molding agent is difficult to dissolve in alcohol, and the preparation is troublesome
[0004] To sum up, among the existing molding agents, rubber molding agents have poor fluidity and difficult quality control; PEG and paraffin molding agents have poor moldability; several improved molding agents have problems such as inconvenient use

Method used

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  • Forming agent for hard alloy production

Examples

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Effect test

Embodiment 1

[0012] Embodiment 1: be 16.5% polyisobutylene, 83.5% 120 by mass percent # Dissolve gasoline, put them into a blender together, stir and mix, wait until polyisobutene is dissolved in gasoline, and form a uniform solution, that is, the molding agent of the present invention is obtained. Add it into the mixture or wet mill, and make cemented carbide products through drying, pressing, sintering and other processes (the process steps after the molding agent is prepared are the same as in the following examples). This formulation molding agent is suitable for the production of all cemented carbides.

Embodiment 2

[0013] Embodiment 2: be 20% polyisobutylene, 80% 120 by mass percent # Dissolve gasoline, put them into a blender together, stir and mix, and wait until polyisobutene dissolves in gasoline to form a uniform solution to obtain the molding agent of the present invention. This formula molding agent is suitable for the production of hard-to-form hard alloys with fine particles or complex shapes.

Embodiment 3

[0014] Embodiment 3: be 16.5% polyisobutylene, 10% paraffin, 73.5% 120 # Dissolve gasoline, put them into a blender together, stir and mix, and wait until polyisobutene dissolves in gasoline to form a uniform solution to obtain the molding agent of the present invention. This formula is suitable for the production of cemented carbide products that are prone to chipping.

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Abstract

The invention discloses a forming agent for hard alloy production. The forming agent for hard alloy production comprises: by mass, 10 to 20% of polyisobutylene, 0 to 10% of paraffin and 70 to 85% of dissolved gasoline 120#. The forming agent for hard alloy production can be prepared easily, has good formability, good fluidity and low carbon residual amount, is non-hygroscopic, has good powder fluidity, allows low compacting pressure, realizes a high compacting qualification rate and stable and controllable product piece weight and sizes, can be utilized for a re-doping process carried out after a spray drying process or a mixture drying process, is suitable for large-scale production, and has low quality control difficulty. The forming agent for hard alloy production can be prepared from the components, or the components of the forming agent for hard alloy production can be directly mixed with hard alloy powder and the mixture is utilized for follow-up production.

Description

technical field [0001] The invention relates to a molding agent for powder metallurgy production, especially a molding agent suitable for hard alloy production. Background technique [0002] Cemented carbide molding must use molding agent, currently used mainly three kinds of molding agent, namely paraffin, PEG (polyethylene glycol) and rubber (butadiene rubber, styrene-butadiene rubber, SBS, etc.). Paraffin molding agent can be used for spray drying and artificial glue blending, low carbon residue, but not miscible with alcohol, poor molding performance, not suitable for the production of products with complex shapes, low compaction strength, prone to edge drop; PEG molding agent is easy to use , safety and environmental protection, suitable for spray drying, miscible with alcohol, low carbon residue, but poor molding performance, not suitable for producing products with complex shapes, easy to absorb moisture; rubber molding agents have good molding properties, but only su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/20C08L91/06C22C1/04
Inventor 张杰文博王力民彭英健周新华肖建光
Owner 株洲长江硬质合金工具有限公司
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