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1.发明授权
公开(公告)号：US4222771A
公开(公告)日：1980-09-16
申请号：US5762
申请日：1979-01-23
CPC分类号： C22C38/22
摘要： High chromium steel, for use at high temperature, of a mixed structure containing ferrite and 0.02-0.09% C, less than 1.0% Si, 0.1-2.0% Mn, 7.0-13.0% chromium, 1.2-3.0% Mo, and the rest being iron and the usual impurities, or further adding aluminum in an amount less than 0.1% to said composition, or further adding 0.001-0.1% boron and less than 0.1% Ti necessary to cause the boron to act effectively, said steel being heated at temperatures lower than about 1050.degree. C. to prevent the oxidation of the steel.
摘要翻译： 含有铁素体和0.02-0.09％C，小于1.0％Si，0.1-2.0％Mn，7.0-13.0％铬，1.2-3.0％Mo的混合结构的高铬钢，其余为高铬钢 或者进一步向所述组合物中加入小于0.1％的铝，或者进一步加入0.001-0.1％的硼和小于0.1％的Ti以使硼有效地起作用，所述钢被加热到 温度低于约1050℃，以防止钢的氧化。
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公开(公告)号：US3950165A
公开(公告)日：1976-04-13
申请号：US394630
申请日：1973-09-06
申请人： Teishiro Oda , Takashi Daikoku
发明人： Teishiro Oda , Takashi Daikoku
CPC分类号： C22C33/0257 , C22C33/0207
摘要： A method of sintering ferrous materials comprises mixing an iron powder with an alloy of iron-titanium and forming a liquid phase during the sintering. The alloy is prepared by mixing selected amounts of iron and titanium powders to form an iron-titanium alloy powder consisting essentially of 14 to 46% by weight of titanium and the balance iron, and preferably 14 to 30% by weight of titanium. The sintering step is carried out at a temperature at which the powdered mixture is always in the liquid phase during sintering. Under these conditions oxidation of titanium is suppressed during melting and the alloy is not too soft nor too difficult to pulverize and used for manufacturing the machine components such as piston rings which have surprisingly good properties due to the use of the critical amounts of iron and titanium in the alloys useful according to the invention.
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