Method for treating mold surface by using laser hardening

A mold surface and laser quenching technology, which is applied in the field of mold surface surface quenching, can solve problems such as surface decarburization, large molds that cannot be strengthened, and low-carbon content materials that cannot be strengthened.

Active Publication Date: 2013-10-09
CSIC NO 12 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for processing the mold surface by laser quenching, which solves the problem of surface decarburization caused by long-term use of the mold and repeated quenching, and solves the problem that large molds cannot be strengthened by conventional means. At the same time, it solves the problem that the existing laser quenching process cannot strengthen materials with low carbon content

Method used

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  • Method for treating mold surface by using laser hardening
  • Method for treating mold surface by using laser hardening
  • Method for treating mold surface by using laser hardening

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Step 1: Spray the water-based carbon-containing paint evenly on the cleaned mold surface with a spray thickness of 0.1-0.2mm. The water-based carbon-containing coating is composed of the following components according to the mass percentage: C and carbide: 5%, light-absorbing coating: 10%, binder: 85%, and the light-absorbing coating is composed of the following components according to the mass percentage: W : 20%, Cr: 20%, Mo: 5%, Co: 10%, and the balance is manganese. C and carbides are composed of carbon black and carbides, carbides account for 15% of C and carbides, carbides are mixed with tungsten carbide and silicon carbide at a mass ratio of 2:3, and the binder is composed of 1:0.05 alcohol mixed with paint flakes;

[0039] Set the laser power to 0.5KW, the scanning speed to 100mm / min, and the laser bandwidth to 2mm, and perform laser infiltration treatment;

[0040] Step 2: Set the laser power to 1KW, the scanning speed to 300mm / min, and the laser bandwidth to...

Embodiment 2

[0042] Step 1: Spray the water-based carbon-containing paint evenly on the cleaned mold surface with a spray thickness of 0.1-0.2 mm. The water-based carbon-containing coating is composed of the following components according to the mass percentage: C and carbide: 25%, light-absorbing coating: 20%, binder: 55%, and the light-absorbing coating is composed of the following components according to the mass percentage: W : 30%, Cr: 30%, Mo: 10%, Co: 20%, and the balance is boron. C and carbides are composed of carbon black and carbides, carbides account for 30% of C and carbides, carbides are mixed with tungsten carbide and silicon carbide at a mass ratio of 2:3, and the binder is composed of 1:0.05 alcohol mixed with paint flakes;

[0043] Set the laser power to 4KW, the scanning speed to 500mm / min, and the laser bandwidth to 40mm for laser infiltration treatment;

[0044] Step 2: Set the laser power to 5KW, the scanning speed to 2000mm / min, and the laser bandwidth to 40mm. Perfo...

Embodiment 3

[0046] Step 1: Spray the water-based carbon-containing paint evenly on the cleaned mold surface with a spray thickness of 0.1-0.2 mm. The water-based carbon-containing coating is composed of the following components according to the mass percentage: C and carbide: 15%, light-absorbing coating: 15%, binder: 70%, and the light-absorbing coating is composed of the following components according to the mass percentage: W : 25%, Cr: 25%, Mo: 8%, Co: 15%, and the balance is boron. C and carbides are composed of carbon black and carbides, carbides account for 20% of C and carbides, carbides are mixed with tungsten carbide and silicon carbide at a mass ratio of 2:3, and the binder is composed of 1:0.05 alcohol mixed with paint flakes;

[0047] Set the laser power to 2KW, the scanning speed to 300mm / min, and the laser bandwidth to 10mm, and perform laser infiltration treatment;

[0048] Step 2: Set the laser power to 3KW, the scanning speed to 1000mm / min, and the laser bandwidth to 1...

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Abstract

The invention discloses a method for treating a mold surface by using laser hardening, which comprises the following steps that: firstly, a water-based carbon-containing coating is preset at a mold decarbonization area, and the coating thickness is 0.1-0.2mm; after the coating is dried, the laser diffusion treatment of a mold is carried out; and secondly, the laser hardening treatment of the obtained mold surface is carried out. According to the method for treating the mold surface by using laser hardening, the surface decarburization problem caused by long-time use in the mold and multiple repeated hardening can be solved, and simultaneously, the problem that a low-carbon material can not be hardened by using the laser hardening can be solved. The hardness of the prepared hardening layer can reach HRC60 (Rockwell hardness (C Scale)) or more, and the local laser hardening can be carried out at the mold decarbonization area and an easy-to-wear area.

Description

technical field [0001] The invention belongs to the technical field of surface quenching of mold surfaces, and in particular relates to a method for processing mold surfaces by laser quenching. Background technique [0002] After repeated flame quenching and long-term high-temperature impact use, severe decarburization will occur on the surface of various mold surfaces. With the reduction of carbon content in the structure, the transformation of quenched martensite shows a downward trend, resulting in the mold after quenching. The strength and hardness of the surface layer are greatly reduced, and early fatigue damage is prone to occur during use. [0003] Once the above problems occur, the carbon content of the surface layer can only be restored by carburizing. At present, the carburizing process can only be carried out through carburizing furnaces, salt bath furnaces and other equipment. For large molds, such as automobile panels, it is difficult to enter the furnace for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/09C21D1/18C21D1/70
Inventor 陈喜锋张镜斌魏刚刘海涛雷其林李延安
Owner CSIC NO 12 RES INST
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