Unlock instant, AI-driven research and patent intelligence for your innovation.

Tough and corrosion resistant white cast irons

A high-chromium white cast iron and white iron technology, applied in the field of high-chromium white iron, can solve problems such as peeling or cracking

Pending Publication Date: 2020-08-21
WEIR MINERALS AUSTRALIA LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] ・Peeling or cracking due to impact loads in use

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
  • Tough and corrosion resistant white cast irons
  • Tough and corrosion resistant white cast irons
  • Tough and corrosion resistant white cast irons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0140] As noted above, applicants have identified a combination of composition and microstructure for castings of high chromium white iron that exhibits corrosion resistance and toughness well suited for many end-use applications for castings.

[0141] The combination identified by the applicant is a high chromium white iron having a composition characterized by (a) a range of Cr and C concentrations and (b) a Cr:C ratio which, when cast and then heat treated, would result in the as-cast form of the casting Within those ranges in which at least a portion of the chromium carbides are transformed into another chromium carbide whereby the end use form of the casting has a mixture of chromium carbides wherein at least one of the chromium carbides is a transformation product of as-cast chromium carbides .

[0142] The amount of conversion product can be selected based on a number of factors including the requirements for the end use form of the casting and the composition of the ca...

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

An end-use casting of a high chromium white iron, i.e. a casting that has been heat-treated, includes a ferrous matrix and at least two different chromium carbides dispersed in the matrix, with at least one of the chromium carbides including a transformation product of an as-cast chromium carbide.

Description

technical field [0001] The present invention relates to tough and corrosion resistant high chromium white iron (also referred to herein as high chromium white cast iron) comprising particles of hard material dispersed in a host metal (a term that includes metal alloys). [0002] The invention also relates to equipment used in the mining and mineral processing industries, such as pump components, including components for slurry pumps, comprising castings or finishes of high chromium white iron, wherein said equipment is exposed to severe Any one or more of abrasive, impact, erosive and corrosive wear. [0003] The invention also relates to a method of forming high chromium white iron. [0004] The invention also relates to a method of forming a casting or veneer of high chromium white iron as at least part of equipment used in the mining and mineral processing industries. Background technique [0005] Equipment used in the mining and mineral processing industries is often s...

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 Applications(China)
IPC IPC(8): C21D5/04C22C33/08C22C37/06C22C29/02
CPCC22C33/08C22C37/06C22C37/08C21D5/04C22C33/006C22C29/02C21D6/002C21D6/004C21D2211/004C22C2204/00C22C29/06C22C29/067C22C38/20C22C38/22C22C38/36C22C38/38C22C38/40
Inventor 汤心虎
Owner WEIR MINERALS AUSTRALIA LTD