Method for preparing complex thin-wall component through laser metal deposition and follow-up rolling

A thin-walled component and complex technology, applied in metal rolling, metal rolling, metal processing equipment, etc., can solve problems such as poor surface quality, secondary deformation, and reduced reliability, and achieve improved density and uniform structure and performance Sex, to avoid the effect of secondary deformation

Active Publication Date: 2021-12-03
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing complex thin-walled components by laser metal deposition and follow-up rolling, which can solve the problem of existing laser metal deposition technology When preparing complex and special-shaped thin-walled components, the residual stress causes component deformation, which prevents the laser beam from a...

Method used

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  • Method for preparing complex thin-wall component through laser metal deposition and follow-up rolling
  • Method for preparing complex thin-wall component through laser metal deposition and follow-up rolling
  • Method for preparing complex thin-wall component through laser metal deposition and follow-up rolling

Examples

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Embodiment 1

[0031] Example 1: Combining figure 1 ,figure 2, image 3 , Figure 4 , Fig. 5 illustrate, the method that the present invention proposes adopts laser metal deposition and follow-up rolling to prepare complex thin-walled member, and this method is to carry out according to the following steps:

[0032] Step 1. Preparation of materials before laser metal deposition forming. Select the type of metal powder according to the material, structure and performance requirements of the formed component, and select the metal substrate according to the material type selected for the component. The metal powder needs to be placed in a vacuum drying furnace to remove moisture before use. In order to make the component and the substrate Forming a good metallurgical bond requires mechanical grinding and cleaning of the metal substrate.

[0033] Step 2, layering the 3D model of the complex thin-walled components. Establish the CAD geometric model of the component according to the three-dime...

Embodiment 2

[0040] Example 2: In conjunction with Figure 2, in step 1, the selected metal powder is GH3536 nickel-based superalloy powder prepared by a vacuum atomization process with a particle size distribution range of 53-106um. The metal substrate is 304 stainless steel, and the metal Before use, the powder was heat-treated in a vacuum drying oven at 120° C. for 3 hours to remove internal moisture, and the other steps were the same as in Example 1.

[0041] The beneficial effect of this embodiment is: the GH3536 nickel-based superalloy has a high alloy content and can withstand a variety of severe corrosive environments. Even in severe corrosive environments, the combination of nickel and chromium can resist oxidation reactions, and the presence of molybdenum These alloys are resistant to pitting and crevice corrosion; in addition, the 304 stainless steel substrate can form a good metallurgical bond with the formed GH3536 thin-walled components, avoiding the cracking defects of both. ...

Embodiment 3

[0042] Example 3: Binding image 3 Note that in steps 3 to 5, when preparing thin-walled plate-shaped components with complex surfaces, the scheme of synchronous reciprocating motion of the laser head and the roll is adopted. During the reciprocating motion, the deflection angle of the roll needs to be adjusted to keep the roll in line contact with the deposition area. , the other steps are the same as in Example 1.

[0043] The beneficial effect of this embodiment is: when forming complex curved thin-walled plate-like components, the laser head and the roller move back and forth synchronously, and the roller performs follow-up rolling on the deposition area completed by laser printing. Stress causes deformation, which makes the laser beam unable to act on the end face of the component, so that the continuous printing of the component cannot be completed, and the complex and special-shaped thin-walled plate with variable wall thickness and special requirements can be prepared ...

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Abstract

The invention belongs to the technical field of laser additive manufacturing, and provides a method for preparing a complex thin-wall component through laser metal deposition and follow-up rolling, which comprises the following steps of: preparing materials before laser metal deposition forming; layering a three-dimensional model of the complex thin-wall component; determining laser metal deposition process parameters; determining roll follow-up rolling process parameters; conducting laser printing on the nth layer, and completing follow-up rolling; repeating the step 3 to the step 5; and performing post-treatment on the thin-wall component. The method can solve problems that when an existing laser metal deposition technology is used for preparing a complex special-shaped thin-wall component, component deformation is caused by residual stress, and a laser beam cannot act on the end face of the component, and the problems that the surface quality is poor and the reliability is reduced due to convex-concave peaks caused by interlayer lap joint on the surface of the formed component, and secondary deformation is easily caused during subsequent machining or laser polishing treatment on the surface of the component.

Description

technical field [0001] The invention belongs to the technical field of laser additive manufacturing, and in particular relates to a method for preparing complex thin-walled components by laser metal deposition and follow-up rolling. Background technique [0002] With the advancement of aerospace technology, in order to meet the development requirements of the new generation of aerospace vehicles and their engines with high Mach number, high performance and high reliability, the demand for lightweight, high-temperature, complex and thin-walled components continues to increase. Depending on the conditions of use, there are large differences in the shape, wall thickness, material type, mechanical properties, etc. of thin-walled components, and their manufacturing methods are also different. In the intake and exhaust systems of advanced fighter jets, there are complex thin-walled metal components with complex shapes, ultra-thin wall thickness, and extremely high precision requir...

Claims

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Application Information

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IPC IPC(8): B22F10/28B22F10/50B22F10/31B22F5/00B22F5/12B22F10/64B22F10/68B21B37/16B21B37/46B21B37/58B33Y10/00B33Y40/00B33Y40/20B33Y80/00
CPCB22F10/28B22F10/50B22F10/64B22F10/68B22F10/31B22F5/00B22F5/106B33Y10/00B33Y40/00B33Y40/20B33Y80/00B21B37/16B21B37/58B21B37/46Y02P10/25
Inventor 梁江凯何祝斌杜巍
Owner DALIAN UNIV OF TECH
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