Laser surface strengthening method for improving surface quality and performance of high-carbon steel component

A surface quality and surface strengthening technology, which is applied in the coating process and coating of metal materials, can solve the problems of large heat-affected zone range of components, large hardening tendency, and decrease of plasticity and toughness of components, so as to reduce thermal influence The effect of reducing the tendency of overheating and reducing the tendency of cracking

Inactive Publication Date: 2020-11-27
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the service process, the surface of high-carbon steel components is prone to surface damage such as cracks and wear. Due to the high carbon content of the components, the hardening tendency is large, and the martensitic structure is easy to form in the heat-affected zone after welding repair, resulting in the plasticity and plasticity of the welded components. Greatly reduced toughness
Due to the large size of the heat source in the traditional arc welding repair, there is too much melting of the base metal in the weld during the welding process, which affects the quality of the weld, and makes the heat-affected zone of the component larger, and preheating and slow cooling heat treatment is required to prevent Crack formation etc.

Method used

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  • Laser surface strengthening method for improving surface quality and performance of high-carbon steel component
  • Laser surface strengthening method for improving surface quality and performance of high-carbon steel component
  • Laser surface strengthening method for improving surface quality and performance of high-carbon steel component

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Embodiment 1

[0035] This embodiment provides a method for surface treatment of high-carbon steel components. It is worth mentioning that the surface treatment of this embodiment refers to performing surface strengthening treatment on high-carbon steel components, including the following steps:

[0036] 1. Surface pretreatment

[0037] Pretreatment of the high carbon steel components as a whole, specifically including manual grinding with an angle grinder to remove rust and oxide film on the surface and cleaning the surface.

[0038] 2. Powder

[0039] Such as figure 1 As shown, a layer of 1Cr13V stainless steel powder is laid on the whole high carbon steel member. 1Cr13V stainless steel powder is prepared by quenching + low temperature (230°C-370°C) tempering heat treatment of 1Cr13 stainless steel powder. 1Cr13 stainless steel powder is commonly used martensitic stainless steel , the price is cheap and easy to obtain, the performance of 1Cr13V stainless steel powder is equivalent to tha...

Embodiment 2

[0054] This embodiment provides a method for surface treatment of high-carbon steel components. It is worth mentioning that the surface treatment in this embodiment refers to the surface repair of high-carbon steel components with surface damage such as abrasion and surface cracks. , compared with embodiment 1, this embodiment comprises the following steps:

[0055] 1. Surface pretreatment

[0056] For the surface damage of high carbon steel components such as abrasion and surface cracks, the damage assessment is first carried out. After determining the position and size of the area to be clad, the groove to be clad is roughly machined by mechanical processing to remove the surface damage, and then angle grinding is used to The machine will grind the groove to be clad to remove rust and oxide film.

[0057] 2. Groove processing

[0058] Groove processing is performed on the grooves of high carbon steel components to be clad to remove surface damage, and the groove processing...

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Abstract

The invention relates to the field of laser surface processing and manufacturing, in particular to a laser surface strengthening method for improving the surface quality and performance of a high-carbon steel component, which comprises the following steps of: integrally paving a layer of 1Cr13V stainless steel powder on the high-carbon steel component, and compacting the powder; carrying out preheating treatment on the high-carbon steel component, and after the preheating treatment is finished, melting the pre-laid powder by adopting a laser cladding process to obtain a deposition layer; and repeating the steps until the preset height requirement is met. The 1Cr13V stainless steel powder has the obvious cost advantage, the cladding forming performance of the powder can be improved by adjusting the element content, namely reducing the C element content and adding a small amount of V element, cracking of a cladding area is effectively prevented, and good metallurgical bonding can be formed between the cladding area and the high-carbon steel component through the laser cladding technology.

Description

technical field [0001] The invention relates to the field of laser surface processing and manufacturing, in particular to a laser surface strengthening method for improving the surface quality and performance of high-carbon steel components. Background technique [0002] Because of its cheap price and high strength and hardness, high carbon steel is widely used in industrial production fields such as tools and molds. However, during the service process, the surface of high-carbon steel components is prone to surface damage such as cracks and wear. Due to the high carbon content of the components, the hardening tendency is large, and the martensitic structure is easy to form in the heat-affected zone after welding repair, resulting in the plasticity and plasticity of the welded components. Toughness is greatly reduced. Due to the large size of the heat source in the traditional arc welding repair, there is too much melting of the base metal in the weld during the welding pro...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 何蓓刘栋朱言言李卓李佳程序张述泉
Owner BEIHANG UNIV
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