IT1083466B - Abrasion resistant steel - for scraper teeth of earth moving machine esp. bulldozer
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Abrasion resistant steel - for scraper teeth of earth moving machine esp. bulldozer
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IT1083466B
IT1083466BIT4783477AIT4783477AIT1083466BIT 1083466 BIT1083466 BIT 1083466BIT 4783477 AIT4783477 AIT 4783477AIT 4783477 AIT4783477 AIT 4783477AIT 1083466 BIT1083466 BIT 1083466B
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Application filed by Komatsu Mfg Co LtdfiledCriticalKomatsu Mfg Co Ltd
Priority to IT4783477ApriorityCriticalpatent/IT1083466B/en
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Publication of IT1083466BpublicationCriticalpatent/IT1083466B/en
Steel contg. C 0.25 - 0.40, Si 1.50 - 2.50, Mn 0.50 - 1.60, Cr 3.00 - 5.00, Mo 0.50 - 1.20 wt.%, balance Fe, is highly abrasion-resistant under the conditions of bulldozer operation. The steel may even further be improved by adding Nb 0.01-0.10 and/or V 0.20-1.50 wt.%. The C level is critical, because higher C contents than 0.4% lower the Charpy nothc impact toughness below 5 kg. m/cm2. The Cr level is also critical as it should be higher than 3 wt.% in order to obtain the required hardness, but it should not exceed 5 wt.% as the Charpy notch impact toughness will then be too low.
IT4783477A1977-01-281977-01-28Abrasion resistant steel - for scraper teeth of earth moving machine esp. bulldozer
IT1083466B
(en)
Cr-mo steel material with plate thickness of 75mm or more for use in retroleum refining apparatus, coal gasifying apparatus and other pressure container