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Double metal combining method in sand mould

A metal composite, dual-material technology, applied in the production of metal castings, can solve the problems of troublesome operation, slow heat transfer of sand mold, oxidation of coated parts, etc., to improve heating efficiency, shorten heating time, and ensure the effect of heating temperature

Inactive Publication Date: 2005-02-23
吴振卿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But obviously, because the heat transfer of the sand mold is very slow, the heating time of the whole sand mold is very long, the efficiency is very low, and the energy consumption is also very high
In addition, because the whole sand mold is hoisted in and out of the box-type heating furnace, the operation is also very troublesome and inconvenient
In addition, although a layer of anti-oxidation and deoxidation solvent can be pre-coated on the coated part of the solid part, due to the long heating cycle of the entire sand box, a large amount of solvent on the solid surface will volatilize, resulting in serious oxidation of the covered part. Oxidation of the metal will seriously hinder the combination of the two-material metal interface
Therefore, this will also seriously affect the composite quality of dual-material metal composite castings

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 , figure 2 As shown, the meanings of the labels in the figure are as follows: 1. Heating induction coil; 2. Protective sleeve; 3. The end of the hammer head to be compounded; 4. Sprue; , feeding riser; 8, sand mold jacket; 9, the gap between the sand box and the protective sleeve; 10, the mechanical combination hole between the hammer end and the hammer handle; 11, the hammer handle; 13, the easy-cut riser piece ; 14, sand mold.

[0026] The workpiece production process is as follows:

[0027] The formed solid carbon steel metal hammer handle 11 is prefabricated according to requirements, and a hole 10 is processed at the joint part of the hammer handle 11 and the high chromium cast iron hammer head end 3 to be compounded, and the hammer handle 11 is prepared for compounding. Purification treatment, grinding with grinding wheels to remove scale and other impurities that hinder metallurgical bonding. Then apply a layer of anti-oxidation protection a...

Embodiment 2

[0035] As shown in Figure 3, Figure 4 , Figure 5 , Figure 6 As shown, the meanings of the labels in the figure are as follows: 1. Heating induction coil; 2. Protective sleeve; 15. The cavity of the outer layer part to be compounded; 3. The cavity of the outer layer part to be compounded; 4. The sprue; 5. Gate socket; 6. Inner runner; 7. Feeding outlet riser; 8. Sand mold coat; 9. The gap between the sand box and the protective sleeve; 16. The solid matrix layer lining the wheel-shaped parts; 14- 2. Sand mold; 14-1. Sand core.

[0036] The production process of this part is as follows:

[0037]The solid matrix layer 16 lined with carbon steel is pre-produced, and then the compound surface of the formed solid metal to be compounded is pre-purified and polished, and a layer of anti-oxidation protection agent is adhered thereon.

[0038] The sand-making core 14-1 is used to create the sprue 4 and the inner runner 6 of the pouring system, and at the same time, put the inner ...

Embodiment 3

[0043] Such as Figure 7 , Figure 8 As shown, the meanings of the labels in the figure are as follows: 1. Heating induction coil; 2. Protective sleeve; 3'. Foam plastic model; 4. Sprue; Air outlet riser; 8, sand mold coat; 9, gap between sand box and protective cover; 11', insert block; 12, nail; 14, sand mold.

[0044] In this process, the workpiece to be compounded is made into a cemented carbide insert 11' in advance, with nails 12 on the insert 11', and the insert 11' is connected with the foam plastic model 3' in advance to form the workpiece shape as a model. When molding, it is put into the sand mold 14, and the whole model forms a cavity together with the insert 11' after the molding, and the foam plastic 3' vaporizes after preheating to form a base metal cavity, while the nail 12 on the insert 11' is Fix the insert 11' at the corresponding position in the cavity. After pouring, the high manganese steel matrix metal liquid vaporizes the remaining foam and fills the ...

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Abstract

A method for attaching one metal to another one in sand mould includes such steps as precleaning the surface of a shaped solid metal, where another metal is attached to, putting it in a sand mould, filling and compacting sand for the surfaces not to be attached, making pouring system, MF induction heating to 200-1000 deg.C, pouring the molten another metal, and cooling.

Description

technical field [0001] The invention relates to an induction-type in-mold dual-material metal compounding method for producing metal castings, especially solid-liquid embedded dual-material metal castings. Background technique [0002] In practical industrial applications, castings are sometimes required to have very high toughness and hardness at the same time. For metals of the same material, toughness and hardness (wear resistance) are usually contradictory and difficult to achieve at the same time. Therefore, dual-material Metal is an ideal choice for producing such castings. In the casting of dual-material metal structure, one material has very high toughness, which is mainly used to resist the impact force of the casting during work, to prevent accidental fracture of the casting, etc., and the other material has very high hardness, so it is resistant to Good abrasiveness can effectively prolong the service life of the workpiece. However, in actual production, due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16
Inventor 吴振卿
Owner 吴振卿
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