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21.发明公开Prealloyed high-vanadium, cold work tool steel particles and method for producing the same 失效Vorlegierte vanadiumreiche Kaltarbeitswerkzeugstahlteilchen und Verfahren zu deren Herstellung。
公开(公告)号：EP0515018A1
公开(公告)日：1992-11-25
申请号：EP92301348.6
申请日：1992-02-19
IPC分类号： C22C33/02
CPC分类号： C22C33/0292 , Y10S75/956
摘要： Prealloyed high-vanadium, cold work tool steel particles are provided for use in the powder-metallurgy production of tool steel articles. The particles are of a cold work tool steel alloy having an MC-type vanadium carbide dispersion of a carbide particle size substantially entirely less than 6 microns and in an amount of 18.5 to 34.0% by volume. The particles are produced by atomizing a molten tool steel alloy at a temperature above 2910°F and rapidly cooling the atomized alloy to form solidified particles therefrom. The particles have the MC-type vanadium carbide dispersion therein.
摘要翻译： 提供预合金高钒，冷作工具钢颗粒用于工具钢制品的粉末冶金生产。 颗粒是具有基本上完全小于6微米并且量为18.5至34.0体积％的碳化物粒度的MC型碳化钒分散体的冷加工工具钢合金。 颗粒通过在2910°F以上的温度下使熔融的工具钢合金雾化并迅速冷却雾化的合金从而形成凝固的颗粒而制成。 颗粒在其中具有MC型碳化钒分散体。
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公开(公告)号：EP0271238B1
公开(公告)日：1992-08-12
申请号：EP87310199.2
申请日：1987-11-19
IPC分类号： C22C37/06
CPC分类号： C22C37/06 , C22C33/0285
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公开(公告)号：EP0076027B1
公开(公告)日：1986-11-12
申请号：EP82304064.7
申请日：1982-08-02
CPC分类号： C22C33/0278 , B21B27/00
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公开(公告)号：EP0076027A2
公开(公告)日：1983-04-06
申请号：EP82304064.7
申请日：1982-08-02
CPC分类号： C22C33/0278 , B21B27/00
摘要： A powder metallurgy article, e.g., a hot working roll or tool or a high toughness cold work tool such as a shear blade or slitter knife, formed from compacted prealloyed powder of an alloy consiting of, in weight percent, manganese 0.2 to 1.5, silicon 2 max., chromium 1.5 to 6, molybdenum 0.50 to 6, sulfur 0.30 max., vanadium 7 to 10, carbon expressed by the formula (.25 minimum, .40 maximum + .16 x percent vanadium), optical carbide forming elements such as tungsten and niobium in amounts up to 5 percent (with the corresponding stoichiometric carbon required for balance) may partially replace vanadium, optional cobalt additions may be included for heat resistance and balance iron and incidental impurities; the article is characterised by a fully martensitic structure with essentially no carbon in the steel matrix in excess of the carbon necessary to combine with the vanadium present to form vanadium carbides and to ensure said fully martensitic structure.
摘要翻译： 一种粉末冶金制品，例如热加工辊或工具或高韧性冷作业工具，例如剪切刀或分切刀，由按重量百分比计的锰0.2至1.5的合金的压实预合金粉末形成，硅0.2至1.5 最大为2，铬1.5至6，钼0.50至6，硫0.30最大，钒为7至10，由式（.25最小值，最大值最大值±.0.4％）表示的碳，光学碳化物形成元素 因为钨和铌的含量高达5％（具有平衡所需的相应的化学计量碳）可以部分替代钒，可以包括任选的钴添加剂用于耐热性和平衡铁和杂质; 该制品的特征在于完全马氏体结构，钢基体中基本上不含碳，超过与存在的钒结合形成碳化钒所必需的碳，并确保所述完全马氏体结构。
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