Short-process recycling method for return scraps

A technology of returning materials and remelting, applied in the field of resource recycling, can solve the problems of waste of resources, environmental pollution, and inability to meet the performance standards, and achieve the effect of short process and no waste treatment process.

Pending Publication Date: 2021-10-19
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, the performance of the riser part cannot meet the standard due to defects such as shrinkage cavities and porosity, so the existing casting process usually cuts it off directly as a return material and discards it
However, the returned material contains a large amount of valuable metal elements (such as Cr, Fe, Ni), and the direct removal and discarding will not only cause serious pollution to the environment, but also lead to waste of resources

Method used

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  • Short-process recycling method for return scraps
  • Short-process recycling method for return scraps
  • Short-process recycling method for return scraps

Examples

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Embodiment 1

[0034] This embodiment provides a recycling method of a nickel-based return material, steps below:

[0035] (1) Analysis of the ingredient, density, microstructure, tensile strength and fracture elongation of the return material;

[0036] (2) Determine the operating conditions of the remelten according to the analysis results;

[0037] 1% C element is added to the remembering forward return.

[0038] The remelted operating conditions are the casting temperature of 1570 to 1590 ° C, the chute baking temperature is 600 ~ 1200 ° C, the ingot mold baking temperature is 400 ~ 600 ° C, the casting speed is 1 ~ 3kg / s, the casting front ingot is preheated to 400 ~ 600 ° C.

[0039] (3) Analysis of the composition, density, microstructure, tensile strength and fracture elongation of the remelted alloy;

[0040] (4) Determine the operating conditions of forging according to the analysis results;

[0041] Improve the return of alloy forging after returning remelting is 3.35;

[0042] The f...

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Abstract

The invention relates to the technical field of resource recycling, in particular to a short-process recycling method for dead head return scraps. The recycling method for the dead head return scraps is characterized in that the return scraps are treated by a remelting-forging combined process. The recycling method for the dead head return scraps has the following advantages that (1) valuable metal elements in the return scraps can be recycled at a time, and the method has the advantages of being short in flow and simplified in process; (2) recycled return scrap alloys are high in quality and can be directly used as an alloy casting raw material, cyclic utilization is realized, and the recycling value is improved; (3) the method is relatively low in treatment cost; and (4) no other waste is generated, and industrial popularization and application are facilitated.

Description

Technical field [0001] The present invention relates to the field of resource cycling utilization, and more particularly to a method of shortflow recovery utilization of a return material. Background technique [0002] The riser refers to a supplementary portion of the casting or the side surface of the casting in the casting. In the mold, the cavity of the riser is used to store liquid metals, and the metal is replenished during casting, and there is a role in preventing damage, declaration, exhaust, and slag, and the main role of the rushing is suppression. [0003] Typically, the rushing part is unable to reach the standard due to defects such as shrinkage, loosening, and therefore the existing casting process is usually directly cut as a return material. However, the return contains a large amount of highly valuable metal elements such as Cr, Fe, Ni, directly cutting abandens, not only cause serious pollution, but also resource waste. Inventive content [0004] It is an obje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C19/05C22F1/10
CPCC22C1/023C22C19/05C22F1/10
Inventor 席晓丽庞宝林王曼王亚楠唐康尧聂祚仁
Owner BEIJING UNIV OF TECH
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