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Welding on process for restoring die

A mold and welding technology, used in manufacturing tools, welding equipment, arc welding equipment, etc., can solve problems such as the impact of production costs, and achieve the effects of good toughness, high hardness and simple operation process

Inactive Publication Date: 2004-11-10
褚宏志
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Molds are widely used in modern industrial production, and some molds are extremely valuable. In production, 95% of the molds are scrapped due to wear and tear, which has a great impact on the actual production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 2

[0029] Example 2, repairing a 6cm long crack in the cold stamping forming drawing die

[0030] The operation steps are as example 1, wherein, the ratio of each composition of the alloy powder is 5% tungsten or tungsten oxide, 43.5% nickel, 25% iron, 3% boron, 18% chromium, 2.5% carbon, 3% silicon, and its fineness is -120 mesh ~ +200 mesh.

[0031] The wear resistance of the repaired mold is increased by 150%, and the surface Rockwell hardness of the weld is HRC61.

example 3

[0032] Example 3, repair the stamping knife-edge mold with a depth of 3.5mm and a width of 5mm at the knife-edge.

[0033] The operation steps are as example 1, wherein the proportion of alloy powder is 4% cobalt, 33% nickel, 32% iron, 4% boron, 20% chromium powder, 2% carbon, 5% silicon, and its particle size is -100 mesh to +200 head.

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PUM

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Abstract

The invention relates to a seaming technique of repairing moulds overworn or having cracks. It includes the steps: eliminating oil stain, quenched layer and rust on the mould surface; preheating the mould; using welding blowpipe to spray alloy powder the surface of the mould to be processed as substrate powder after the alloy powder burns with oxygen / ethyne mixed fuel; heating the substrate powder, and spot-spraying the alloy powder to melt and combine the alloy powder and the mould in one; placing the mould at initial temperature of 450-350 deg.C, and reducing the environment temperature to 50-100 deg.C and this moment taking out the mould; polishing the repair surface. It can be widely applied to repair the moulds made of various materials, the operating process is simple, reasonable, fast, and the seamed layer has high hardness, good flexibility and wearability, able to largely reduce consumption cost of punching and molding the moulds.

Description

technical field [0001] The invention relates to a welding process, in particular to a welding process for repairing molds with excessive wear or cracks. Background technique [0002] Molds are widely used in modern industrial production. Some molds are of great value. In production, 95% of molds are scrapped due to wear and tear, which has a great impact on actual production costs. The materials of the molds are all extremely difficult to weld materials such as special mold steel, alloy cast steel, and alloy cast iron, and there are extremely high technical requirements for molds with hardness, strength, wear resistance, impact resistance, and temperature resistance. . If you find a material and process that can be welded on various mold steel, alloy cast steel, alloy cast iron, stainless steel, copper, and aluminum materials, and repair molds that are scrapped due to excessive wear, this has been the mold repair industry for many years. A technical problem that has never ...

Claims

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Application Information

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IPC IPC(8): B23K5/18B23K9/04
Inventor 褚宏志
Owner 褚宏志
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