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| Effect of Rare Earth Element on Impact Toughness of 430 Ferrite Stainless Steel |
| XU Biao1,FENG Haibo1,WANG Longmei2,XU Min1,WANG Fu1 |
| 1.School of Materials and Metallurgy, Northeastern University，Shenyang 110004， Liaoning, China； 2.Metallurgical Technology Institute，Central Iron and Steel Research Institute, Beijing 100081， China |
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Abstract The effect of rare earth element on impact toughness of 430 ferrite stainless steel at -20 ℃, 0 ℃, 20 ℃ was studied by metallographic examination, SEM and electron spectroscopy. The results show that the modification of inclusions can slower crack propagation. Fracture is changed from cleavage to ductile fracture by adding rare earth element to the 430 steel. The transverse impact value of lowRE 430 steel can be increased by about five times.
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Received: 01 January 1900
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2008, Vol. 43 
