A preparation process of solder suitable for rapid repair of cold stamping dies and inserts

A preparation process, cold stamping technology, applied in welding equipment, welding/cutting medium/material, welding medium, etc., can solve the problem of unsuitable mold crack macro shape repair, etc., and achieve the effect of improving surface quality

Active Publication Date: 2018-07-27
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of its principle, it can only repair the wear surface, bluntness and edge chipping in a small amount, and it is not suitable for repairing mold cracks, macroscopic shape changes and large-area damage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Repair of CrWMn die material for deep-drawn thin steel sheets and copper alloys.

[0027] The weight percentage of the solder used is: aluminum 16%, chromium 2%, manganese 4%, iron 2%, and the balance is copper and unavoidable impurities.

[0028] First put pure copper into the graphite crucible, the bottom of the graphite crucible is connected with a graphite tube, the graphite tube is blocked with a dummy device, the outside of the graphite tube is connected to the crystallizer, and the copper in the crucible is heated to the melting temperature (>1100 ℃), the surface of the melted copper liquid is covered with charcoal to ensure that the copper liquid is not oxidized;

[0029] Add pure aluminum ingots to the graphite crucible filled with molten copper according to the corresponding proportion. At the same time, chromium, manganese and iron are added to the graphite crucible in the form of aluminum intermediate alloys according to the corresponding proportion. 750°C,...

Embodiment 2

[0032] Repair of Cr12MoV automotive panel molds and insert materials. Automobile panel molds have large cross-sections, complex shapes, and withstand large impact loads, so they often need to be repaired.

[0033] The weight percentage of the solder used is: 20% aluminum, 4% chromium, 2% manganese, 4% iron, and the balance is copper and unavoidable impurities.

[0034] First put pure copper into the graphite crucible, the bottom of the graphite crucible is connected with a graphite tube, the graphite tube is blocked with a dummy device, the outside of the graphite tube is connected to the crystallizer, and the copper in the crucible is heated to the melting temperature (>1100 ℃), the surface of the melted copper liquid is covered with charcoal to ensure that the copper liquid is not oxidized;

[0035] Add pure aluminum ingots to the graphite crucible filled with molten copper according to the corresponding proportion. At the same time, chromium, manganese and iron are added to...

Embodiment 3

[0038] Restoration of Cr12W mold material for die of silicon steel sheet.

[0039] Preferably, the solder components are composed by weight percentage: 18% aluminum, 2.5% chromium, 2.3% manganese, 3.5% iron, and the balance is copper and unavoidable impurities.

[0040] First put pure copper into the graphite crucible, the bottom of the graphite crucible is connected with a graphite tube, the graphite tube is blocked with a dummy device, the outside of the graphite tube is connected to the crystallizer, and the copper in the crucible is heated to the melting temperature (>1100 ℃), the surface of the melted copper liquid is covered with charcoal to ensure that the copper liquid is not oxidized;

[0041] Add pure aluminum ingots to the graphite crucible filled with molten copper according to the corresponding proportion. At the same time, chromium, manganese and iron are added to the graphite crucible in the form of aluminum intermediate alloys according to the corresponding pro...

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Abstract

The invention provides soldering flux applicable to quick restoration of cold-punching dies and inserts and a preparation process of the soldering flux. The soldering flux comprises, by weight, 15-20% of aluminum, 1-5% of chromium, 1-5% of manganese, 1-3% of iron and the balance of copper and inevitable impurity. The preparation process of the soldering flux includes steps of continuously casting blank metal bar in the diameter of 3-6 mm in a horizontal or vertical continuous casting manner, and grinding and polishing the blank metal bar so as to be directly used as soldering flux for quickly restoring the cold-punching dies and the inserts. The soldering flux used for quickly restoring the cold-punching dies and the inserts has the advantages of short restoration time, less post-welding defects, good mobility during welding, less deformation and cracking and capability of preventing scratch or drag damage and the like. The cold-punching dies and the inserts after restoration can be further used more than 30,000 times.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and provides a solder suitable for rapid repair of cold stamping dies and inserts and a preparation process. Background technique [0002] Cold stamping dies and inserts are mostly special tools installed on the press, which apply deformation force to the sheet placed inside at room temperature to deform it, so as to obtain products of certain shape, size and performance. [0003] At present, most of the materials for manufacturing cold stamping dies and inserts are mainly steel. The types of commonly used die working parts materials are: carbon tool steel, low alloy tool steel, high carbon high chromium or medium chromium tool steel, medium carbon Alloy steel, high speed steel, and hard alloy steel, etc. [0004] The cold stamping die and the insert exert pressure on the sheet during the movement of the press, so that the sheet can complete the separation process (blanking, pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/302B23K35/40
Inventor 梁贺胡捷李德富
Owner 有研金属复材技术有限公司
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