Ultrahigh-strength wear-resistant steel plate and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9695487-B2
Application number	US-201214129106-A
Country	US
Kind code	B2
Filing date	May 25, 2012
Priority date	Nov 25, 2011
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

The present invention provides a high-strength wear-resistant steel plate with Brinell hardness of ≧HB420, comprising the following chemical compositions (by weight %) C: 0.205-0.25%, Si: 0.20-1.00%, Mn: 1.0-1.5%, P≦0.015%, S≦0.010%, Al: 0.02-0.04%, Ti: 0.01-0.03%, N≦0.006%, Ca≦0.005%, and at least one of Cr≦0.70%, Ni≦0.50%, Mo≦0.30%, other compositions being Ferrum and unavoidable impurities. Also provided is a method of manufacturing the wear-resistant steel plate has remarkable TRIP effect in use, improving substantially its wear resistance, thereby meeting the high demand for wear-resistant steel plates in related industries.

First claim

The invention claimed is:

1. A wear-resistant steel plate, comprising the following chemical compositions, by weight percentage, C: 0.205-0.25%, Si: 0.20-1.00%, Mn: 1.0-1.5%, P≦0.015%, S≦0.010%, Al: 0.02-0.04%, Ti: 0.01-0.03%, N≦0.006%, Ca≦0.005%, and at least one of Cr, Ni and Mo with Cr≦0.70%, Ni≦0.50%, and Mo≦0.30%, and the balance being Ferrum and unavoidable impurities; wherein the wear-resistant steel plate has a Brinell hardness of ≧420 HB and has a structure characterized as tempered martensite and 5-10% residual austenites, and wherein the wear-resistant steel plate does not contain B.

2. The wear-resistant steel plate according to claim 1 , characterized in that the carbon equivalent Ceq is 0.57-0.64.

3. The wear-resistant steel plate according to claim 1 , characterized in that C is 0.205-0.245% by weight.

4. The wear-resistant steel plate according to claim 1 , characterized in that Si is 0.20-0.99% by weight.

5. The wear-resistant steel plate according to claim 1 , characterized in that Mn is 1.11-1.45% by weight.

6. The wear-resistant steel plate according to claim 1 , characterized in that P is ≦0.009% by weight.

7. The wear-resistant steel plate according to claim 1 , characterized in that S is ≦0.004% by weight.

8. The wear-resistant steel plate according to claim 1 , characterized in that Al is 0.021-0.039% by weight.

9. The wear-resistant steel plate according to claim 1 , characterized in that Ti is 0.013-0.022% by weight.

10. The wear-resistant steel plate according to claim 1 , characterized in that N is 0.0033-0.004% by weight.

11. The wear-resistant steel plate according to claim 1 , characterized in that Ca is 0.001-0.003% by weight.

12. The wear-resistant steel plate according to claim 1 , characterized in that Cr is 0.35-0.65% by weight.

13. The wear-resistant steel plate according to claim 1 , characterized in that Ni is 0.16-0.40% by weight.

14. The wear-resistant steel plate according to claim 1 , characterized in that Mo is 0.18-0.24% by weight.

15. The wear-resistant steel plate according to claim 1 , characterized in that the thickness thereof is 6-25 mm.

Assignees

• Zhang Aiwen
• Wang Guodong
• Jiao Sihai
• Baoshan Iron & Steel

Inventors

• Zhang Aiwen
• Wang Guodong
• Jiao Sihai

Classifications

• C22C38/28

  with titanium or zirconium · CPC title

• C22C38/06

  containing aluminium · CPC title

• C21D8/0263 Primary

  following hot rolling · CPC title

• C21D9/46

  for sheet metals · CPC title

• C22C38/002

  containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60 · CPC title