Method for repairing metal part through laser additive protected by mud mold

A metal parts, laser additive technology, applied in the direction of additive processing, metal material coating process, coating, etc., can solve the problems of difficult manufacturing, waste of resources, high production cost, etc., achieve good plasticity and reduce the cost of remelting Effect

Active Publication Date: 2021-01-05
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal parts with different shapes may be damaged in different degrees and forms due to long-term use and the influence of different working environments, which may easily cause problems such as low mechanical efficiency, failures, and even mechanical damage.
Especially for metal parts that work in environments with high temperature, strong corrosion, and high wear, high production costs, and difficult manufacturing, once damaged, it will cause waste of resources. Therefore, a repair with high precision and low loss is required. technology, cost savings
The existing repair methods are almost all clamped by processed molds, and some metal parts have complex shapes, some curved surfaces, not a single regular shape. If they are clamped by processed molds, it is difficult to process them. tight fit mold,
If the bond is not good, it may cause a large amount of remelting of the substrate

Method used

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  • Method for repairing metal part through laser additive protected by mud mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0033] On the basis of the above embodiment, in this embodiment, in the step S1, if the shape of the metal part is regular, its size is L+X, W+X, H+X, where L, W, and H are The length, width, and height of the finished metal part, X is the increment of the length, width, and height of the finished metal part, if the metal part is irregular, measure its highest point and lowest point, the leftmost and rightmost Distance difference x, y; In the step S3, the slotting width of the top of the mud fan is d, which should not be too large, and the height difference h between the top of the mud fan and the top of the metal part depends on the specific circumstances; the size in the step S1 The range of X is 0.5-2 mm; in the step S3, the groove width d is 0.5-1 mm, and the height difference h is 0.5-2 mm.

Embodiment 3

[0035] On the basis of the foregoing embodiments, in this embodiment, metal parts with regular shapes are repaired, and the specific steps are as follows:

[0036] Step S1: Clean and dry the surface of the metal part to be repaired; measure the size of the metal part to be repaired, and record the measurement data.

[0037] Step S2: According to the measured size data, make a mud form larger than half of the finished metal part volume, ensure that the surface of the mud form is smooth, and the water content of the mud form is moderate. The mud fan is cut into two pieces of the same size, and the metal parts are sandwiched between the two mud fans, and then modified to ensure that the two are tightly fitted.

[0038] Step S3: Groove the surface of the metal part to be repaired and the contact part of the clay fan. Use a utility knife to cut a 0.5~1mm groove on the part where the two are closely attached. Keep a height difference of 0.5~2mm between the surface to be repaired an...

Embodiment 4

[0043] On the basis of the above-mentioned embodiments, in this embodiment, the irregular and curved metal parts are repaired, and the specific steps are as follows:

[0044] Step S1: Clean and dry the surface of the metal part to be repaired; measure the size of the metal part to be repaired, mainly measure the distance difference between the lowest point and the highest point, the leftmost and the rightmost, and record the measurement data.

[0045] Step S2: According to the measured size data, make a mud form larger than half of the finished metal part volume, ensure that the surface of the mud form is smooth, and the water content of the mud form is moderate. The mud fan is cut into two pieces of the same size, and the metal parts are sandwiched between the two mud fans, and then modified to ensure that the two are tightly fitted.

[0046] Step S3: Groove the surface of the metal part to be repaired and the contact part of the clay fan. Use a utility knife to cut a 0.5~1mm...

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Abstract

The invention discloses a method for repairing a metal part through a laser additive protected by a mud mold. The method is characterized by comprising the following steps that (1) the surface of themetal part to be repaired is cleaned and dried, and size measurement and appearance analysis are conducted on the metal part to be repaired; (2) the mud mold with the proper size is manufactured; (3)the metal part to be repaired is tightly attached to the mud mold; (4) grooving treatment is conducted on the top of the mud mold; (5) copper foil pasting treatment is conducted on the tight contact part of the mud mold and the metal part and the grooving part; (6) powder is laid on the grooving part, and laser cladding treatment is conducted; and (7) finish machining treatment is conducted on a cladding layer formed in the step (6). The method has the advantages that the mud mold has very good plasticity and can be tightly attached, the mud mold contains water, evaporation of the water can absorb a large amount of heat, and the influence of heat input on a base material is reduced.

Description

technical field [0001] The invention relates to the technical field of laser cladding, and specifically relates to a method for repairing metal parts with laser additives protected by mud. Background technique [0002] The development of modern society is inseparable from the use of machinery. Metals inevitably suffer from various failures during long-term use. Most mechanical failures are caused by damage to metal parts. Metal parts with different shapes may be damaged in different degrees and forms due to long-term use and the influence of different working environments, which may easily cause problems such as low mechanical work efficiency, failures, and even mechanical damage. Especially for metal parts that work in environments with high temperature, strong corrosion, and high wear, high production costs, and difficult manufacturing, once damaged, it will cause waste of resources. Therefore, a repair with high precision and low loss is required. technology and cost sav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105C23C24/10B33Y10/00B33Y40/00B33Y50/02
CPCC23C24/103B33Y10/00B33Y40/00B33Y50/02Y02P10/25
Inventor 杨高林姚建华吴国龙周玉亮
Owner ZHEJIANG UNIV OF TECH
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