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| Ausform Hardening Process of Semi-HSS Cold Forged Roll Material |
| WU Qiong,SUN Da-le |
| Research Institute, Baoshan Iron and Steel Co., Ltd., Shanghai 201900, China |
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Abstract Ausform hardening process of Semi-high speed steel cold forged roll materials was investigated. Compared with the mechanical properties and microstructure from traditional heat treatment, the following conclusions are obtained: The carbides of semi-high speed steel from ausform hardened (final forging temperature≥900℃, oil cooled) and tempered at 750℃ are distributed uniformly and dispersedly, with moderate size. Fine carbides is easily to be soluted in the final heat treatment, which is beneficial to the microstructure of rolls; In addition to the moderate hardness, more balanced intensity, ductility and toughness can be obtained after new process compared with spheroidizing annealing. Therefore, the conventional heat treatment process after forging can be replaced by the new ausform hardening process, to save energy and improve production efficiency.
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Received: 24 June 2010
Published: 28 September 2011
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2011, Vol. 46 
