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A method for preparing high-hardness and high-strength dies by laser cladding and nitriding

A technology of laser cladding and high hardness, which is applied in the field of die-cutting manufacturing, can solve problems such as residual stress and harmful effects of deformation, and achieve the effects of shortening the preparation cycle, enhancing strength, and rapid preparation process

Active Publication Date: 2022-06-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Functionally graded materials help with this need, but residual stresses and deformations due to high temperature gradients and thermal expansion coefficient mismatches between different materials can have detrimental effects

Method used

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  • A method for preparing high-hardness and high-strength dies by laser cladding and nitriding
  • A method for preparing high-hardness and high-strength dies by laser cladding and nitriding
  • A method for preparing high-hardness and high-strength dies by laser cladding and nitriding

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Experimental program
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Effect test

Embodiment 1

[0039] Please refer to Figure 1 to Figure 4 , a method for preparing a high-hardness, high-strength knife die by laser cladding and nitriding in this embodiment includes the following steps:

[0040] S1, according to the prepared die design drawings, use professional drawing software to draw a three-dimensional model of the die, and save it as a three-dimensional file format; wherein, preferably Solidworks is used to draw the three-dimensional model of the die, and the saved file format is preferably a .STL file.

[0041] S2, load the file saved in S1 into the slicing software, set the laser power, printing layer thickness, laser scanning speed and powder feeding path parameters of the laser cladding equipment, and generate the corresponding G code;

[0042] S3, import the G code generated in S2 into the upper computer of the laser cladding equipment;

[0043] S4, place the forming substrate on the forming platform, and adjust the spot size, powder feeding amount, carrier ga...

Embodiment 2

[0054] Please refer to figure 1 , figure 2 and image 3 , a method for preparing a high-hardness, high-strength knife die by laser cladding and nitriding in this embodiment includes the following steps:

[0055] First, prepare the materials that will be used in the preparation. Select 420 spherical particle powder, the particle size is

[0056] , that is, the particle size of the 420 spherical particle powder is 100-200 mesh; the forming matrix is ​​made of 45# steel, and the oxide layer is removed by grinding with sandpaper, and then wiped with acetone after grinding.

[0057] Then, according to the basic steps described in Embodiment 1, namely:

[0058] S1, draw a three-dimensional model of the die according to the plane drawing of the die, and generate a .STL file.

[0059] S2, import the .STL file into the slicing software, set the laser power to 400w, the laser scanning speed to 350 mm / min, the printing layer thickness to 0.2 mm, and the powder feeding path to be ...

Embodiment 3

[0065] Please refer to figure 1 and Figure 4 , a method for preparing a high-hardness, high-strength knife die by laser cladding and nitriding in this embodiment includes the following steps:

[0066] First, prepare the materials that will be used in the preparation. Select 420 spherical particle powder, the particle size is , that is, the particle size of the 420 spherical particle powder is 100-200 mesh; the forming matrix is ​​made of 45# steel, and the oxide layer is removed by grinding with sandpaper. After grinding, wipe with acetone.

[0067] Then, according to the basic steps described in Embodiment 1, namely:

[0068] S1, draw a three-dimensional model of the die according to the plane drawing of the die, and generate a .STL file.

[0069] S2, import the .STL file into the slicing software, set the laser power to 400w, the laser scanning speed to 350 mm / min, the printing layer thickness to be 0.2 mm, and the powder feeding path to be dual-path powder feeding, th...

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Abstract

The invention discloses a method for preparing a high-hardness and high-strength knife mold by laser cladding and nitriding, which includes the following steps: S1, according to the prepared knife mold design drawing, use professional drawing software to draw a three-dimensional model of the knife mold, and save it as Three-dimensional file format; S2, load the file saved in S1 into the slicing software, set the laser power, printing layer thickness, laser scanning speed and powder feeding path parameters of the laser cladding equipment, and generate the corresponding G code; S3, convert S2 Import the G code generated in the laser cladding equipment into the host computer; S4, place the forming substrate on the forming platform, and adjust the spot size, powder feeding amount, carrier gas flow and protective gas flow according to the preset requirements; S5, print knife Mold blank; S6, finishing the blank of the knife mold printed in S5, cutting out the blade, and then preparing a high-hardness, high-strength knife mold. By melting the metal powder with a laser beam to make it deposited into shape and using nitrogen protection, the nitrogen infiltrates the metal surface, thereby improving the strength of the metal surface.

Description

technical field [0001] The invention relates to the technical field of knife mold manufacturing, in particular to a method for preparing a high-hardness and high-strength knife mold by laser cladding and nitriding. Background technique [0002] The knife die is a commonly used product in the die-cutting industry, and is generally used to punch out the desired shape of the die-cutting product. With the rapid development of economy, the application fields of knife molds have become very wide, such as electronic materials, printing and packaging, plastic packaging, leather, toys, automobiles, decoration, rubber products, EVA and various foams, precision electronic gaskets , Mylar tablets, nameplates, flexible circuit boards and other industries have the application of knife die. Knife die plays a pivotal role in product manufacturing. At present, the preparation of knife molds mainly includes laser knife molds, engraving knife molds, and etching knife molds. However, no matt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F10/28B22F10/50B22F10/85B22F10/66B33Y10/00B33Y80/00B33Y50/02B33Y40/20
CPCB22F3/24B22F5/00B22F7/08B33Y10/00B33Y80/00B33Y50/02B33Y40/20B22F2003/247B22F2005/001
Inventor 刘军王臻
Owner CENT SOUTH UNIV