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48 条记录 (耗时 0.031 秒)

    Case hardened steel with high tempering temperature, method for obtaining same and parts formed with said steel
    47.
    发明授权
    Case hardened steel with high tempering temperature, method for obtaining same and parts formed with said steel 有权
    具有高回火温度的表面硬化钢，获得相同的方法和由所述钢形成的部件

    公开(公告)号：US06699333B1

    公开(公告)日：2004-03-02

    申请号：US09720927

    申请日：2001-02-26

    申请人： Philippe Dubois

    发明人： Philippe Dubois

    IPC分类号： C22C3844

    CPC分类号： C22C38/44 ,  C21D1/18 ,  C21D1/28 ,  C21D6/004 ,  C22C38/46 ,  C23C8/22 ,  F02M61/166

    摘要： The invention discloses a carburizing steel composition comprising, by weight: 0.06% to 0.18% of C; 0.5% to 1.5% of Si; 0.2% to 1.5% of Cr; 1% to 3.5% of Ni; 1.1% to 3.5% of Mo; and, if appropriate: at most 1.6% of Mn; and/or at most 0.4% of V; and/or at most 2% of Cu; and/or at most 4% of Co; the complement being constituted by iron and residual impurities; the amounts of Ni, Mn, Cu, Co, Cr, Mo and V in said composition, expressed by weight, satisfying the following relationships: 2.5≦Ni+Mn+1.5Cu+0.5Co≦5  (1) 2.4≦Cr+Mo+V≦3.7  (2) and a process for producing carburized and treated parts produced from the compositions.

    摘要翻译： 本发明公开了一种渗碳钢组合物，其含有：C：0.06〜0.18％，Si：0.5〜1.5％，Cr：0.2〜1.5％，Ni：1〜3.5％，Ni：1.1〜3.5％ Mo;如果合适，最多为1.6％的Mn; 和/或最大0.4％的V; 和/或最多2％的Cu; 和/或最多4％的Co;补体由铁和残余杂质构成;所述组合物中的Ni，Mn，Cu，Co，Cr，Mo和V的量以重量表示，满足以下关系：和 用于生产由组合物制备的渗碳和处理部件的方法。

    Polysaccharides grafted with aliphatic polyesters derived from cyclic esters
    48.
    发明授权
    Polysaccharides grafted with aliphatic polyesters derived from cyclic esters 失效
    用衍生自环酯的脂肪族聚酯接枝的多糖

    公开(公告)号：US5616671A

    公开(公告)日：1997-04-01

    申请号：US632291

    申请日：1996-04-15

    申请人： Ramani Narayan ,  Philippe Dubois ,  Mohan Krishnan

    发明人： Ramani Narayan ,  Philippe Dubois ,  Mohan Krishnan

    IPC分类号： C08B31/04 ,  C08G63/664 ,  C08L3/06 ,  C08L67/04 ,  C08L101/00 ,  C08G16/00

    CPC分类号： C08L67/04 ,  C08B31/04 ,  C08G63/664 ,  C08L101/00 ,  C08L3/06

    摘要： Novel synthetic pathways to derive aliphatic polyester-grafted polysaccharides from cyclic ester monomers, preferably, poly(.epsilon.-caprolactone) and starch. Different reaction schemes lead to compositions with various levels of grafting. The grafting reactions were conducted using bulk monomer and an organometallic polymerization agent (catalyst or initiator) such as metal alkoxides initiators which were generated in-situ by the reaction of metal alkyls with hydroxyl groups of the polysaccharide. The grafting reactions were characterized by very fast reaction times of the order of a few minutes to effect complete conversion of monomer. Biodegradable compositions, particularly using these poly(.epsilon.-caprolactone)-grafted starch are described for use in film applications.

    摘要翻译： 从环酯单体，优选聚（ε-己内酯）和淀粉衍生脂族聚酯接枝多糖的新型合成途径。 不同的反应方案导致具有各种水平的接枝的组合物。 接枝反应使用本体单体和有机金属聚合剂（催化剂或引发剂）如金属醇盐引发剂进行，其通过金属烷基与多糖的羟基的反应原位产生。 接枝反应的特征是非常快的几分钟的反应时间以实现单体的完全转化。 特别是使用这些聚（ε-己内酯）移植淀粉的生物可降解组合物被描述用于膜应用中。