Supercharge Your Innovation With Domain-Expert AI Agents!

Method for improving wear resistance of surface of iron-based powder metallurgy product by electron beam remelting

An iron-based powder metallurgy and electron beam remelting technology, applied in the field of powder metallurgy, can solve the problems of insufficient surface mechanical properties of iron-based powder metallurgy products, and achieve the effects of small deformation of the workpiece, small heat input, and small thermal influence.

Inactive Publication Date: 2019-07-05
常熟市华德粉末冶金有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the problem of insufficient surface mechanical properties of iron-based powder metallurgy products, and provides a method for effectively improving the hardness and surface wear resistance of iron-based powder metallurgy products

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
  • Method for improving wear resistance of surface of iron-based powder metallurgy product by electron beam remelting
  • Method for improving wear resistance of surface of iron-based powder metallurgy product by electron beam remelting
  • Method for improving wear resistance of surface of iron-based powder metallurgy product by electron beam remelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, the metal powder is formed by 23T pressure, and then sent to the mesh belt type sintering iron furnace for sintering. It is kept at 1000°C and 1080°C for 6 minutes, and at 1120°C for 30 minutes, and then slowly cooled in the furnace. During the sintering process, the furnace Into the hydrogen, prepared into iron-based powder metallurgy products.

Embodiment 2

[0028] First, the metal powder is formed by 23T pressure, and then sent to the mesh belt type sintering iron furnace for sintering. It is kept at 1000°C and 1080°C for 6 minutes, and at 1120°C for 30 minutes, and then slowly cooled in the furnace. During the sintering process, the furnace Hydrogen is introduced into the medium to prepare iron-based powder metallurgy products.

[0029] Fix the sintered powder metallurgy product on the workbench, seal the molding cavity and pump it to a high vacuum state; then use an electron beam with a current of 8mA to scan the surface of the sample with a voltage of 60kV, a scanning speed of 10mm / s, and maintain a heat output of 3J / mm , and then cut out a small middle part for inlaying, so as to observe the change of its cross-sectional properties later.

Embodiment 3

[0031] The difference between this embodiment and Embodiment 2 is that a 9 mA electron beam is used, and the voltage, scanning speed, and heat output of the electron beam remain unchanged.

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

No PUM Login to View More

Abstract

The invention relates to a method for improving the wear resistance of a surface of an iron-based powder metallurgy product by electron beam remelting. The method comprises the following steps that firstly, iron-based alloy powder is pressed and sintered to prepare the iron-based powder metallurgy product; the sintered powder metallurgy product is fixed to a workbench, and a molding cavity is sealed and pumped to a high vacuum state; and high-energy electron beam scanning is performed on the surface of the product, so that the surface of the product is molten, and rapidly solidified. Accordingto the electron beam surface remelting iron-based powder metallurgy product prepared through the method, a martensite remelting layer structure with fine grains and uniform structures is formed aftercooled to the room temperature, and the hardness and the wear resistance of the product can be remarkably improved by the surface remelting layer.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a method for improving the surface wear resistance of iron-based powder metallurgy products through electron beam remelting. Background technique [0002] Powder metallurgy is a process technology for preparing metal materials, composite materials and various types of products by taking metal powder as raw material, forming and sintering it. Due to the advantages of high raw material utilization rate, low manufacturing cost, near-net shape and high product precision, powder metallurgy technology has been more and more widely used in the automobile industry. However, due to problems such as low densification and uneven distribution of powder metallurgy products, their mechanical performance indicators have been reduced, and they cannot meet the performance requirements for parts with high load bearing and high friction and wear resistance. [0003] At present, the most commonly u...

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): B22F3/24B22F3/02B22F3/10C22C38/16C22C38/08C22C38/12
CPCB22F3/02B22F3/10B22F3/24C22C38/08C22C38/12C22C38/16
Inventor 张莎莎杨海屹刘子利姚正军陶学伟陆贤文邹德华
Owner 常熟市华德粉末冶金有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com