Abstract
Abstract The Al 2 O 3 -Fe-Cr composite was prepared and lined on the inner surface of the seamless steel pipe with the gravitational separation SHS method by using Al, Fe 2 O 3 and Cr 2 O 3 powders as the raw materials for improving the properties of the Al 2 O 3 -Fe-Cr composite-lined steel pipe. The effect of the amount of Cr 2 O 3 addition on the preparation process in the SHS reaction system of Al-Fe 2 O 3 -Cr 2 O 3 was discussed, and the micro-structure and properties of the Al 2 O 3 -Fe-Cr composite were observed and investigated. The results showed that a transition structure was formed in the SHS, which could improve the bonding quality of the composite-lined steel pipe; with the addition of Cr 2 O 3 , the Fe-Cr alloy formed and could improve the anti-corrosion ability of the Al 2 O 3 -Fe-Cr composite; the SHS speed decreased and the thickness and hardness of the Al 2 O 3 -Fe-Cr composite increased with the increase of the Cr 2 O 3 addition, and then the abrasion resistance was improved.
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