Unlock instant, AI-driven research and patent intelligence for your innovation.

Forming agent for cemented carbide production

A technology of cemented carbide and forming agent, applied in the field of forming agent for cemented carbide production, can solve the problems of low green compact strength, high slurry viscosity, difficult control, etc., and achieve small compact size deviation and loose density fluctuation. Small, easy-to-use effect

Active Publication Date: 2011-12-07
ZHUZHOU HARD ALLOY GRP CO LTD
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of PEG is that it is easy to use, safe and environmentally friendly, and it is compatible with alcohol. It can be put into a ball mill in solid form to be milled together with raw materials, and the viscosity of the slurry is low. It is suitable for the modern cemented carbide production process-spray drying process, and the residual carbon is low; The disadvantage is that the pressing pressure is high, the forming performance is not ideal, the product is easy to crack, and the product with complex shape cannot be pressed
The advantage of paraffin is that there are few residues; the disadvantage is that it is inconvenient to use, it is not compatible with alcohol, it is not suitable for the production of cemented carbide with alcohol as the wet grinding medium, the forming performance is not ideal, and the green strength is low
The advantage of rubber molding agent is that it has good molding performance and can press products with complex shapes; the disadvantage is that it is inconvenient to use, it is not compatible with alcohol, and it cannot be mixed with rubber by ball milling. It can only be mixed by hand after ball milling. Spray drying process, and high residual carbon, difficult to control
[0003] In summary, there is a lack of a molding agent that is soluble in alcohol, spray-drying, and has good molding performance in the existing molding agents.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Forming agent for cemented carbide production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: A molding agent composed of 40% polyoxyethylene stearate, 10% dioctyl phthalate, and 50% hydrogenated rosin by mass percentage, according to the brand name of the preparation purpose The proportion of molding agent required for the cemented carbide mixture is directly put into the ball mill barrel together with the cemented carbide powder raw material and alcohol for ball milling and mixing. The mixed material is spray-dried, pressed and sintered to obtain the cemented carbide product ( The processing steps after ball milling and mixing are the same as in the following examples). This formulation molding agent can be used in the production of various types of hard alloys.

Embodiment 2

[0010] Example 2: A molding agent composed of 45% polyoxyethylene stearate, 10% dioctyl phthalate, and 45% hydrogenated rosin by mass percentage, according to the brand name of the preparation purpose The proportion of molding agent required for the cemented carbide mixture is directly put into the ball mill barrel together with the cemented carbide powder raw material and alcohol for ball milling and mixing. This formulation molding agent can be used in the production of various types of hard alloys.

Embodiment 3

[0011] Example 3: A molding agent composed of 50% polyoxyethylene stearate, 15% dioctyl phthalate, and 35% hydrogenated rosin by mass percentage, according to the brand name of the preparation purpose The proportion of molding agent required for the cemented carbide mixture is directly put into the ball mill barrel together with the cemented carbide powder raw material and alcohol for ball milling and mixing. This formulation molding agent can be used in the production of various types of hard alloys.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a molding agent for hard alloy production, which consists of 40%-55% polyoxyethylene stearate, 10%-15% dioctyl phthalate, 50%-30 % of hydrogenated rosin, it is completely compatible with alcohol, and can be put into a ball mill in solid form for ball milling with raw materials, and the slurry viscosity is low, suitable for spray drying process, low residual carbon, easy to use, safe and environmentally friendly; and the pressing pressure is low, Good formability, can press products with complex shapes.

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] In the production process of cemented carbide, in order to make the powder pressed into products of various shapes, a certain amount of molding agent must be added to it to improve the molding performance of the mixture and enhance the strength of the product. The molding agents currently used mainly include polyethylene glycols (PEG); paraffins; and rubbers: butadiene rubber, butadiene rubber, hydroxyl-terminated polybutadiene liquid rubber, styrene-butadiene-styrene ( SBS), styrene-isoprene-styrene (SIS) block copolymer. The advantages of PEG are that it is easy to use, safe and environmentally friendly, and it is compatible with alcohol. It can be put into a ball mill in solid form to be milled together with raw materials, and the viscosity of the slurry is low. It is suitable for th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08L71/02B22F1/00C08L93/00C08K5/12
Inventor 孟小卫汪巍
Owner ZHUZHOU HARD ALLOY GRP CO LTD