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

A kind of high carbon medium chromium wear-resistant cast iron and preparation method thereof

A wear-resistant cast iron, high-carbon technology, applied in the field of wear-resistant cast iron, can solve the problems of further improvement of hardness, complicated heat treatment process, long heat treatment time, etc., and achieves the effects of low production cost, simple preparation method and short production cycle.

Active Publication Date: 2022-02-01
WUHAN UNIV OF SCI & TECH +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, the existing wear-resistant cast iron not only has the technical defects of high alloy cost, complex heat treatment process and long heat treatment time, but also needs to be further improved in hardness.

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 kind of high carbon medium chromium wear-resistant cast iron and preparation method thereof
  • A kind of high carbon medium chromium wear-resistant cast iron and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A high-carbon medium-chromium wear-resistant cast iron and a preparation method thereof. The chemical composition and content of the high-carbon medium-chromium wear-resistant cast iron are: C is 3.63wt%, Cr is 12.16wt%, Si is 0.51wt%, Mn is 0.63wt%, Mo is 1.72wt%, and B is 0.32wt%. wt%, P≤0.03wt%, S≤0.03wt%, the balance is Fe and unavoidable impurities; wherein: Cr / C=3.350, B / Mo=0.186.

[0030] According to the chemical composition and its content, it is formulated, smelted, poured, air-cooled to room temperature, and ground; then heated to 850°C, kept for 3 hours, quenched into oil, and cooled to room temperature to produce high-carbon medium-chromium wear-resistant cast iron.

[0031] The high-carbon medium-chromium wear-resistant cast iron prepared by the invention is tested: the carbide content is 40vol%, the retained austenite is 10.8vol%; the rest is martensite; the high-carbon medium-chromium wear-resistant cast iron has a hardness of 70.3HRC.

Embodiment 2

[0033] A high-carbon medium-chromium wear-resistant cast iron and a preparation method thereof. The chemical composition and content of the high carbon medium chromium wear-resistant cast iron are: C is 3.74wt%, Cr is 14.90wt%, Si is 0.61wt%, Mn is 0.69wt%, Mo is 1.85wt%, B is 0.38 wt%, P≤0.03wt%, S≤0.03wt%, the balance is Fe and unavoidable impurities; wherein: Cr / C=3.984, B / Mo=0.205.

[0034] According to the chemical composition and its content, it is formulated, smelted, poured, air-cooled to room temperature, and ground; then heated to 950°C, kept for 2 hours, quenched into oil, and cooled to room temperature to produce high-carbon medium-chromium wear-resistant cast iron.

[0035] The high-carbon medium-chromium wear-resistant cast iron prepared by the invention is tested: the carbide content is 45vol%, the retained austenite is 8vol%, and the rest is martensite; the high-carbon medium-chromium wear-resistant cast iron has a hardness of 71HRC.

Embodiment 3

[0037] A high-carbon medium-chromium wear-resistant cast iron and a preparation method thereof. The chemical composition and content of the high-carbon medium-chromium wear-resistant cast iron are: C is 3.81wt%, Cr is 14.14wt%, Si is 0.78wt%, Mn is 0.75wt%, Mo is 1.98wt%, and B is 0.31wt%. wt%, P≤0.03wt%, S≤0.03wt%, the balance is Fe and unavoidable impurities; wherein: Cr / C=3.711, B / Mo=0.156.

[0038] According to the chemical composition and its content, it is formulated, smelted, poured, air-cooled to room temperature, and ground; then heated to 1000°C, kept for 1 hour, quenched into oil, and cooled to room temperature to produce high-carbon medium-chromium wear-resistant cast iron.

[0039] The high-carbon medium-chromium wear-resistant cast iron prepared by the invention is tested: the carbide is 47vol%, the retained austenite is 9.2vol%, and the rest is martensite; the hardness of the high-carbon medium-chromium wear-resistant cast iron is 69.4HRC.

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
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a high-carbon medium-chromium wear-resistant cast iron and a preparation method thereof. The technical scheme is as follows: the chemical composition and content of the high-carbon medium-chromium wear-resistant cast iron are: C is 3.61-3.99wt%, Cr is 12.11 ~14.99wt%, Si is 0.51~0.79wt%, Mn is 0.61~0.89wt%, Mo is 1.71~1.99wt%, B is 0.31~0.39wt%, P≤0.049wt%, S≤0.049wt%, remaining The amount is Fe and unavoidable impurities; among them: 3.35≤Cr / C≤3.99, 0.15≤B / Mo≤0.23. According to the chemical composition and content of ingredients, smelting, pouring, air cooling to room temperature, grinding; then heating to 850-1050 ℃, heat preservation for 1-3 hours, quenching into oil, cooling to room temperature, that is, high carbon medium chromium resistant Grind cast iron. The invention has the characteristics of low production cost, simple preparation method and short production cycle, and the prepared high-carbon medium-chromium wear-resistant cast iron has high hardness and good toughness.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant cast iron. In particular, it relates to a high-carbon medium-chromium wear-resistant cast iron and a preparation method thereof. Background technique [0002] Wear-resistant cast iron refers to cast iron with high hardness and high wear resistance in which the carbon in the alloy mainly exists in the form of carbides. The main method to improve the hardness of wear-resistant cast iron is to increase the hardness of the matrix and reduce the amount of retained austenite, ferrite and bainite. The main method to improve the hardness of the matrix is ​​to increase the C content, thereby increasing the content of martensite and increasing the number of alloy carbides; reducing the retained austenite is mainly to increase the transformation of martensite, that is, to change the martensite transformation point M s Control above room temperature; reduce the amount of ferrite mainly by increasing ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/06C22C37/10C22C33/08C21C1/08C21D1/18C21D5/00
CPCC22C37/06C22C37/10C22C33/08C21C1/08C21D1/18C21D5/00C21D2211/001C21D2211/008
Inventor 吴开明
Owner WUHAN UNIV OF SCI & TECH
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