Technology for producing hard alloy woodworking blade by means of fine-particle return scraps

A technology of cemented carbide and return material, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of poor corrosion resistance, oxidation capital, high manufacturing cost, etc. The effect of cost reduction and stable performance

Inactive Publication Date: 2016-06-08
江西耀升钨业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. High manufacturing cost
Since high-speed steel, cemented carbide and superhard materials are made of W, Cr, Co or PCD (synthetic polycrystalline diamond), PCBN (polycrystalline cubic boron nitride), although the manufacturing cost of high-speed steel is lower than other materials, it is difficult to process The application of high-strength woodworking composite materials is limited due to the influence of processing efficiency and surface finish; although cemented carbide, PCD, and PCBN materials can meet the processing requirements of high-strength woodworking composite materials, their manufacturing process and formula determine the material cost. high
[0004] 2. Wear resistance, heat resistance and hardness cannot adapt to the processing of wood composite materials
[0005] 3. Poor corrosion resistance
[0006] Since the production of cemented carbide rods will produce a certain amount of fine particle return materials, if they are not stored for a long time, it will easily cause oxidation and a backlog of funds
Traditional tool materials can no longer meet the process requirements, but the wear resistance, heat resistance and high hardness of cemented carbide are especially suitable for the processing of wood composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A process for producing cemented carbide woodworking blades by using fine particle return materials, comprising the following steps:

[0023] S1. Recycling and dewaxing the fine particle return material produced in the bar production process;

[0024] S2. Add the returned material processed in step S1 into a rolling ball mill using cemented carbide as a grinding body. The rotating speed of the ball mill is: 42-62 rpm, the ball-to-material ratio of the ball mill is: 2-5:1, and the ball mill medium It is absolute ethanol, adding 5-7% molding agent and 0.2-0.4% surface active agent of the total mass of raw materials at the same time, the cumulative ball milling time is: 130-150 hours, and the slurry after ball milling is spray dried Chemical drying, drying temperature: 80°C-100°C, drying time: 100-160 minutes, bulk density of the obtained spray-dried mixed pellets: 2.0-3.3g / cm3, fluidity: 30-50 seconds / 50g ;

[0025] S3. The sprayed pellets are molded by a precision pres...

Embodiment 2

[0031] A process for producing cemented carbide woodworking blades by using fine particle return materials, comprising the following steps:

[0032] S1. Recycling and dewaxing the fine particle return material produced in the bar production process;

[0033] S2. Add the returned material processed in step S1 into a rolling ball mill using cemented carbide as a grinding body. The rotating speed of the ball mill is: 42-62 rpm, the ball-to-material ratio of the ball mill is: 2-5:1, and the ball mill medium It is absolute ethanol, adding 5-7% molding agent and 0.2-0.4% surface active agent of the total mass of raw materials at the same time, the cumulative ball milling time is: 130-150 hours, and the slurry after ball milling is spray dried Chemical drying, drying temperature: 80°C-100°C, drying time: 100-160 minutes, bulk density of the obtained spray-dried mixed pellets: 2.0-3.3g / cm3, fluidity: 30-50 seconds / 50g ;

[0034] S3. The sprayed pellets are formed by a precision pres...

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Abstract

The invention discloses a technology for producing a hard alloy woodworking blade by means of fine-particle return scraps. The technology comprises the following steps that S1, the fine-particle return scraps produced in the bar production process are recycled and dewaxed; S2, the return scrap treated in the step S1 are added into a rotary mill with hard alloy serving as a grinding body; and S3, spray particles are formed through a precision press and sintered in a pressure sintering furnace. The dewaxing technology is adjusted, so that it is guaranteed that dewaxing is carried out completely, and the property of the fine-particle return scraps is not influenced; the proper ball milling carbon addition technology is determined; by means of testing of the forming performance of various forming agents, a pressing test is carried out, the proper forming agents are screened out, and it is ensured that the pressing performance of a hard alloy woodworking cutter produced through the fine-particle return scraps is stable, and the forming agents are reasonable in ratio; and the wear resistance and heat resisting strength of the hard alloy woodworking blade manufactured through the technology are remarkably improved, hardness is reasonable, and the manufacturing cost is greatly reduced.

Description

technical field [0001] The invention relates to a process for producing cemented carbide woodworking blades by using fine particle return material. Background technique [0002] Usually woodworking tool materials mainly include carbon tool steel, alloy tool steel, Stellite alloy, high-speed steel, etc. These materials are often used in occasions with low cutting speed, low feed speed and low processing accuracy requirements, and are generally used for solid wood processing. . With the emergence of wood composite materials such as fiberboard, particleboard, plywood and laminated timber, these traditional cutting materials can no longer meet the process requirements. The cemented carbide materials originally used for metal processing are now widely used in wood processing, and gradually It replaces high-speed steel and other materials; polycrystalline diamond and polycrystalline cubic boron nitride have extremely high hardness and wear resistance, small friction coefficient a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F5/00B22F3/14B22F9/04C22C30/00C22C32/00
CPCB22F1/0003C22C29/06C22C30/00C22C32/0052B22F3/14B22F5/00B22F9/04B22F2998/10B22F2005/001B22F2009/043B22F1/107B22F1/14
Inventor 刘小平赵迎九郭建锋陈敏雷林飞
Owner 江西耀升钨业股份有限公司
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