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Using method of pressed borax in copper-steel bimetal casting process

A bimetallic and borax technology, applied in the field of bimetallic composite molding, can solve problems such as shrinkage and shrinkage, achieve volume reduction, avoid casting defects, and reduce dependence

Active Publication Date: 2021-07-13
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, common casting defects such as shrinkage porosity and shrinkage cavity are also faced after casting

Method used

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  • Using method of pressed borax in copper-steel bimetal casting process
  • Using method of pressed borax in copper-steel bimetal casting process
  • Using method of pressed borax in copper-steel bimetal casting process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Method for use in crimping boron sand in bimetallic molten casting process of copper steel, including steps:

[0024] Step 1, boron sand is added to the graphite crucible, mounting the graphite crucible to the induction heating furnace, 8 min in the induction heating furnace, to remove crystalline water; then grind the boron sand to the particle size of 100-200 mesh.

[0025] Step 2, the boron sand after procedure is mixed with potassium fluoride, sodium carbonate, and obtain a mixed powder. In mixed powders, the mass percentage of potassium fluoride accounts for 5%, and the mass percentage of sodium carbonate accounts for 5%, and the margin is borax;

[0026] The resulting mixed powder was pressed, the pressing pressure was 50 MPa, the pressure main pressure time was 5 min, and the pressure of the boron was 9.14 g, and the density was 56% boron sand block.

[0027] Step 3, using anhydrous ethanol cleaning steel matrix (45 # steel groove diameter 46 mm, 9.14 g of the molten...

Embodiment 2

[0031] Method for use in crimping boron sand in bimetallic molten casting process of copper steel, including steps:

[0032] Step 1, boron sand is added to the graphite crucible, mounting the graphite crucible to the induction heating furnace, 8 min in the induction heating furnace, to remove crystalline water; then grind the boron sand to the particle size of 100-200 mesh.

[0033] Step 2, the boron sand after procedure is mixed with potassium fluoride, sodium carbonate, and obtain a mixed powder. In mixed powders, the mass percentage of potassium fluoride accounts for 5%, and the mass percentage of sodium carbonate accounts for 5%, and the margin is borax;

[0034] The resulting mixed powder was suppressed, the pressure was 40 MPa, the pressure main pressure time was 5 min, and the pressure of the boron mass was 0.85 g, and the density was 48% boron sand block.

[0035] Step 3, using anhydrous ethanol cleaning steel base (45 # steel groove diameter 46 mm, 6.85 g of the molten la...

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Abstract

The invention discloses a using method of pressed borax in a copper-steel bimetal casting process. The using method comprises the following steps of dehydrating borax, refining particles, mixing the borax with potassium fluoride and sodium carbonate, pressing the mixture into a borax block, and using the borax block in the copper-steel bimetal casting process. According to the method, the borax can achieve the effects of deoxidation, oxidation prevention, heat preservation and construction of sequential solidification conditions, the volume of the borax is reduced by pressing the borax, and the dependence of the borax on the size of a steel substrate is reduced.

Description

Technical field [0001] The present invention belongs to the field of bimetallic composite molding, and more particularly to the use of pressing boron sand in a copper steel bimetallic molten casting process. Background technique [0002] Copper steel double metal has a wide range of applications in various mechanical parts, especially in a bushing, bushing, plunger pump, in a bushing, bushing, plunger pump. Components, large and medium-sized stamping die guide parts, etc. have key applications. The molding method of copper steel bimetallics has many methods. The methods currently widely used in production include: rolling complex method, powder sintering, castrating compound, electromagnetic continuous casting, molten casting method. The rolling complex method and powder sintering method have generally presented limits with high binding strength difficult to stably operate at high loads, cast and electromagnetic continuous casting have complex operation, and expensive equipment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D23/06B22D19/16
CPCB22D23/06B22D19/16
Inventor 尹延国刘凌峰吴玉程曹刚李蓉蓉张钰辉刘聪
Owner HEFEI UNIV OF TECH
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