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| STUDY ON SPHEROIDIZING OF EUTECTIC CARBIDES IN ALLOY WHITE CAST IRON CONTAINING TUNGSTEN |
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Revised:September 03, 2004
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| KeyWord:Tungsten alloy white cast iron,Modification,Carbide,Spheroidizing |
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| Abstract: |
| Tungsten alloy white cast iron(TAWCI)has a low cost,but the application is limited owing to its high brittleness.For this reason,the influence of Ce,K and Na on the structure and properties of TAWCI was researched.An idea of evaluating the nodular effect of carbides by using the circular degree(C.D)was put forward.The results showed that the structure of eutectic carbides in white cast iron after modified changed dramatically.On normal condition of heat treatment the network structure has turned into sphericity,increasing the impact toughness by 72.2% and the wear resistance by 49.9%.Moreover,the mechanism of carbide spheroidizing was analyzed,the influences of carbide spheroidizing on the impact toughness and wear resistance of TAWCI were also studied.As compared with high-chromium cast iron rolls,the service life of the rolls made from the modified TAWCI has been increased by 20% and its production cost decreased by over 30%.Obviously,a broad application of the modified TAWCI can produce better economical benefits. |
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