Compression moulding method for WC-Co pre-fired reclaimed materials

A technology of recycled materials and pre-burning, which is applied in the direction of improving process efficiency, etc., and can solve problems such as not being able to be used directly, serious powder oxidation, and longitudinal cracks

Active Publication Date: 2019-08-30
晋城富联鸿刃科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of pre-sintering, cobalt (Co) powder and tungsten carbide (WC) powder are subjected to high temperature and post-processing, and the powder is seriously oxidized. The oxidized powder becomes dry and hard, and the formability is poor.
Furthermore, part of the internal stress is generated by high temperature, and it is not easy to be pressed during molding, so that the WC-Co waste powder produced after post-processing is not good in formability when forming compacts, and is prone to longitudinal cracks, and cannot be used directly after compaction, resulting in waste of resources and high cost

Method used

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  • Compression moulding method for WC-Co pre-fired reclaimed materials
  • Compression moulding method for WC-Co pre-fired reclaimed materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Take 5Kg of high-purity paraffin and melt it, put it into a tilting wet mill, then add 230Kg of 10-type tungsten carbide powder, 20Kg of cobalt powder and 60Kg of alcohol, wet mill for 36 hours, and prepare the first mixture by spray drying. Take three samples of 50g each to measure the dry humidity, and take the average value.

[0031] Step 2: Take 5Kg of high-purity paraffin and melt it, put it into a tilting wet mill, then add 250Kg of pre-fired recycled material and 60Kg of alcohol, wet mill for 36 hours, and prepare the second mixture by spray drying. Take three samples of 50g each to measure the dry humidity, and take the average value.

[0032] Step 3: Take 250Kg of pre-fired recycled material, place it in the sintering furnace, gradually raise the temperature to 500°C at a heating rate of 5°C / min, keep it warm for 180min, and then cool down with the furnace. Take 5Kg of high-purity paraffin and melt it, add it to a tilting wet mill, then add 250Kg of pr...

Embodiment 2

[0038] Step 1: Take 5Kg of high-purity paraffin and melt it, put it into a tilting wet mill, then add 230Kg of 10-type WC, 20Kg of cobalt powder and 60Kg of alcohol, wet mill for 36 hours, and prepare the first mixture by spray drying. Take three samples of 50g each to measure the dry humidity, and take the average value.

[0039] Step 2: Take 5Kg of high-purity paraffin and melt it, put it into a tilting wet mill, then add 250Kg of pre-fired recycled material and 60Kg of alcohol, wet mill for 36 hours, and prepare the second mixture by spray drying. Take three samples of 50g each to measure the dry humidity, and take the average value.

[0040] Step 3: Take 250Kg of pre-fired recycled materials, place them in a sintering furnace, raise the temperature at 7°C / min to 600°C and keep it for 150min while cooling in the furnace. Take 5Kg of high-purity paraffin and melt it, add it to a tilting wet mill, then add 250Kg of processed pre-burned recycled material and 60Kg of alcohol, ...

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Abstract

The invention provides a compression moulding method for WC-Co pre-fired reclaimed materials. The method comprises the following steps that 1, the WC-Co pre-fired reclaimed materials are placed into asintering furnace to be tempered; 2, the pre-fired reclaimed materials tempered are subjected to wet milling and spray drying, at least two samples are taken, the dryness and humidity degrees are measured correspondingly, and the dryness and humidity degree average value is calculated; 3, a mixture of tungsten carbide powder and cobalt powder is subjected to wet milling and spray drying, at leasttwo samples are taken, the dryness and humidity degrees are measured correspondingly, and the dryness and humidity average value is calculated; 4, the differential value of the dryness and humidity average values in the step 2 and the step 3 is calculated, and the mass of alcohol needing to be supplemented is calculated according to the differential value; 5, the pre-fired reclaimed materials subjected to spray drying treatment and the alcohol of the corresponding mass are mixed and stirred; and 6, the stirred mixture is pressed into a blank through compression moulding forming. According tothe method, the compression moulding yield of the pre-fired reclaimed materials is increased, waste of resources is reduced, and the production cost is saved.

Description

technical field [0001] The invention relates to a compression molding method of WC-Co pre-burned recycled materials. Background technique [0002] Large-sized special-shaped YG alloy has an appearance close to the finished product, and the post-processing process is simple and efficient. The forming compact needs to go through the process of pre-sintering, post-processing, and sintering, and a large amount of waste compacts and recycled waste will be generated during the process, accounting for the total mass of the finished product. About 60% of. [0003] In the process of pre-sintering, cobalt (Co) powder and tungsten carbide (WC) powder are subjected to high temperature and post-processing, and the powder is seriously oxidized. The oxidized powder becomes dry and hard, and has poor formability. Furthermore, part of the internal stress is generated by high temperature, and it is not easy to be pressed during molding, so that the WC-Co waste powder produced after post-proc...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F3/02C21D1/18C22F1/00
CPCB22F9/04B22F3/02C21D1/18C22F1/00B22F2009/042Y02P10/20
Inventor边伟袁晓波薛桂全李军旗蒋益民孙娜贾耀波李尧项凤鸣
Owner晋城富联鸿刃科技有限公司