| LI Tong-dao,WANG Yong,HAN Bin.Investigation on Laser Remelting and Property of High Chromium Cast Steel[J],37(1):40-41,74 |
| Investigation on Laser Remelting and Property of High Chromium Cast Steel |
| Received:August 23, 2007 Revised:February 10, 2008 |
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| DOI： |
| KeyWord:High chromium cast steel Laser remelting Microstructure Hardness |
| Author | Institution |
| LI Tong-dao |
School of Mechanical and Electronic Engineering of China University of Petroleum, Dongying , China |
| WANG Yong |
School of Mechanical and Electronic Engineering of China University of Petroleum, Dongying , China |
| HAN Bin |
School of Mechanical and Electronic Engineering of China University of Petroleum, Dongying , China |
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| Abstract: |
| In order to improve surface properties of the burning spraying nozzles of boilers , using a 5kW continuous wave C02 laser to perform the laser remelting treatment experiment on specimen of high chromium cast steel, the microstructure and the hardness of the specimen were measured. The results show that as cast structure of high chromium cast steel is coarsely and non-homogeneous, is mainly austenite, ledeburite and carbides. After laser remelting, the section is divided into remelted zone consisted of austenite and carbides, quenched zone composed of austenite and carbides, heat affected zone and base metal. The region and the hardness of various zones are related to the laser processing parameters. The hardening depth of melted zone and quenched zone may be up to Imm ~2mm. The hardening effect is not obvious after laser remelting treatment because the formation of austenite in remelting zone. |
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