Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A laser repair method for the surface of ball-ground cast iron

A technology of ductile cast iron and laser repair, which is applied in the field of materials, can solve problems such as cracking at the interface between the cladding layer and the substrate, and achieve the effect of small thermal influence and high bonding strength

Active Publication Date: 2017-12-15
WUHAN HGLASER ENG CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To this end, the present invention provides a laser repair method for the surface of nodular cast iron, which solves the cracking problem that is prone to occur at the interface between the cladding layer and the substrate when the surface of the nodular cast iron is clad. The technical solution specifically includes the following steps:

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A laser repair method for the surface of ball-ground cast iron
  • A laser repair method for the surface of ball-ground cast iron
  • A laser repair method for the surface of ball-ground cast iron

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this example, DILAS semiconductor laser is used for surface profiling repair on the QT500 alloy surface of 180mm×80mm×40mm. The specific repair process is as follows:

[0036] 1) Preparation of ball milled cast iron laser repair powder material, the repair powder material adopts Fe-15Cr-4Ni alloy powder, the alloy powder includes Cr element with a mass fraction of 14.92%, Ni element with 4.4%, Mo element with 1.96%, and Mo element with 0.73% Mn element, 0.34% Co element, the balance is Fe element.

[0037] 2) Clean the damaged part of the QT500 alloy mold; specifically, use a hand-held grinder to remove the oxide on the surface, remove the sharp corners on the pit wall, make the pit wall smoother, and the bottom is arc-shaped, and use acetone Clean the damaged area and surrounding surfaces.

[0038] 3) Preheat the QT500 alloy mold to be repaired to 200°C; specifically, put the QT500 alloy mold to be repaired on the electric blanket of the temperature-controllable re...

Embodiment 2

[0050] In this example, DILAS semiconductor laser is used for surface profiling repair on the QT500 alloy surface of 180mm×80mm×40mm. The specific repair process is as follows:

[0051] 1) Preparation of ball milled cast iron laser repair powder material, the repair powder material is Ni-5Cr alloy powder, the alloy powder contains 4.65% Cr element, 0.21% Co element, 0.17% Fe element, and the balance is Ni element .

[0052] 2) Clean the damaged part of the QT500 alloy mold; specifically, use a hand-held grinder to remove the oxide on the surface, remove the sharp corners on the pit wall, make the pit wall smoother, and the bottom is arc-shaped, and use acetone Clean the damaged area and surrounding surfaces.

[0053] 3) Preheat the QT500 alloy mold to be repaired to 200°C; specifically, put the QT500 alloy mold to be repaired on the electric blanket of the temperature-controllable resistance furnace, surround the electric blanket and the alloy with asbestos, and the electric ...

Embodiment 3

[0058] In this example, DILAS semiconductor laser is used for surface profiling repair on the QT500 alloy surface of 180mm×80mm×40mm. The specific repair process is as follows:

[0059] 1) Preparation of ball milled cast iron laser repair powder material, the repair powder material adopts Fe-15Cr-4Ni alloy powder, the alloy powder includes Cr element with a mass fraction of 14.92%, Ni element with 4.4%, Mo element with 1.96%, and Mo element with 0.73% Mn element, 0.34% Co element, the balance is Fe element.

[0060] 2) Clean the damaged part of the QT500 alloy mold; specifically, use a hand-held grinder to remove the oxide on the surface, remove the sharp corners on the pit wall, make the pit wall smoother, and the bottom is arc-shaped, and use acetone Clean the damaged area and surrounding surfaces.

[0061] 3) Preheat the QT500 alloy mold to be repaired to 200°C; specifically, put the QT500 alloy mold to be repaired on the electric blanket of the temperature-controllable re...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Microhardnessaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for laser repairing the surface of spheroidal cast iron, comprising the following steps: 1) preparing powder material for laser repairing spheroidal cast iron; 2) pretreating the area to be clad; 3) preheating the base material; 4) Multi-layer cladding is carried out on the damaged part of the surface of the spheroidal cast iron. The single layer thickness of the cladding layer is 1.2-1.3mm. 2mm; 5) After cladding, the nodular cast iron is cooled to room temperature, and the colorant is sprayed to check whether there are crack defects; 6) The cladding repair layer of the nodular cast iron is machined to remove the protruding coating on the outer surface of the damaged part. The cladding area formed by this method has no crack defects and has little thermal influence on the base material. The interface between the cladding layer and the ductile cast iron base material shows a discontinuous melting trend, and the interface is a typical jagged shape. The bonding strength is high and the interface is avoided. Cracks occur due to the formation of continuously transformed ledeburite.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a laser cladding method, in particular to a laser repair method for the surface of ball-ground cast iron. Background technique [0002] Ductile iron is a high-strength cast iron material developed in the 1950s. Its comprehensive properties are close to those of steel. It has good wear resistance, shock absorption, insensitivity to notch and excellent casting performance. Higher than gray cast iron, it is commonly used in industry to make large mold parts. However, in actual use, due to the long-term complex loads on the mold surface, the surface of the ductile iron mold is easily damaged, resulting in mold failure. [0003] In the industry, the manual welding method is commonly used to repair the defects on the surface of the mold, but the heat input of this traditional method is too large, which has a great thermal impact on the base material, resulting in excessive residual st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C24/10
CPCC23C24/106
Inventor 王爱华熊大辉叶兵翁志坤祁小勇
Owner WUHAN HGLASER ENG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com