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1. 发明授权

US6071163A Wear-resistant spark plug electrode tip containing platinum alloys, spark plug containing the wear-resistant tip, and method of making same 有权
标题翻译：含有铂合金的耐磨火花塞电极头，含有耐磨头的火花塞及其制造方法
公开(公告)号：US6071163A
公开(公告)日：2000-06-06
申请号：US264268
申请日：1999-03-08
申请人： Chin-Fong Chang , Richard Dale Taylor , Lee Randall Franz , Edgar Arnold Leone , Alex Kozlov
发明人： Chin-Fong Chang , Richard Dale Taylor , Lee Randall Franz , Edgar Arnold Leone , Alex Kozlov
IPC分类号： C22F1/14 , C22C5/04 , C22F1/00 , H01T13/39 , H01T21/02 , H01T13/20
CPC分类号： H01T21/02 , H01T13/39
摘要： A wear-resistant electrode tip for a spark plug, and a spark plug which incorporates the wear-resistant tip. The wear-resistant tip includes an alloy of platinum, iridium, and tungsten. Surprisingly, by addition of a small amount of tungsten to platinum-iridium alloy, the wear-resistance of a resultant spark plug is greatly improved. The spark plug electrode tip according to the invention is either spherical or rivet-shaped. During manufacture, the spark plug electrode tip is annealed in an annealing furnace. The annealing furnace is preferably either charged with an inert gas such as argon or nitrogen, or is subjected to a vacuum. The electrode tip is, optionally, further externally coated with platinum or a compatible bonding metal alloy before attachment to the electrode. Subsequent to annealing and, where used, to external coating, the spark plug electrode tip is placed in a welding fixture. The tip is then aligned with a spark plug electrode and is resistance welded thereto. Similar procedures are preferably performed on both the center and side electrodes of the spark plug. The annealed spark plug electrode tips using the novel alloys according to the invention have a high resistance to attack by lead and other corrosive elements typically present in the combustion chambers of internal combustion engines. A preferred method of making a wear-resistant spark plug is also disclosed.
摘要翻译：用于火花塞的耐磨电极端头和包含耐磨端头的火花塞。耐磨头包括铂，铱和钨的合金。令人惊奇的是，通过向铂 - 铱合金中添加少量钨，可以大大提高所得到的火花塞的耐磨性。根据本发明的火花塞电极头是球形或铆钉形的。在制造过程中，火花塞电极头在退火炉中退火。退火炉优选用惰性气体例如氩气或氮气填充，或者进行真空。在连接到电极之前，可选地，电极末端进一步外部涂有铂或相容的粘结金属合金。在退火之后，如果使用外部涂层，将火花塞电极头放置在焊接夹具中。然后将尖端与火花塞电极对准并且与其电阻焊接。类似的方法优选在火花塞的中心和侧面电极上进行。使用根据本发明的新型合金的退火火花塞电极端头具有高的耐受铅和通常存在于内燃机的燃烧室中的其它腐蚀性元件的侵蚀。还公开了制造耐磨火花塞的优选方法。

2. 发明授权

US6045424A Spark plug tip having platinum based alloys 失效
标题翻译：具有铂基合金的火花塞头
公开(公告)号：US6045424A
公开(公告)日：2000-04-04
申请号：US114425
申请日：1998-07-13
申请人： Chin-Fong Chang , Richard Dale Taylor , Lee Randall Franz , Edgar Arnold Leone
发明人： Chin-Fong Chang , Richard Dale Taylor , Lee Randall Franz , Edgar Arnold Leone
IPC分类号： C22F1/02 , C22C5/04 , C22F1/00 , C22F1/14 , H01T13/20 , H01T13/39 , H01T21/02
CPC分类号： H01T21/02 , H01T13/39
摘要： A spark plug and method of making same, wherein the spark plug includes a platinum alloy tip portion which takes the form of a rivet or a sphere. The tip portion is annealed in an annealing furnace at a temperature between about 700.degree.-1400.degree. C. for a time between about 5-30 minutes. The annealed tip portion is then resistance welded to an electrode of the spark plug. The annealing provides the tip portion with added resistance to corrosion and attack by lead. Preferred embodiments of the spark plug tip material comprise 80% platinum--20% rhodium; 80% platinum--20% iridium; 96% platinum--4% tungsten; and Pt (bal)-Ir(a)%-W(b)%, where "a" ranges from about 15 to 19 percent by weight, "b" ranges from about 1 to 4 percent by weight, and the balance is comprised of platinum and incident impurities, and wherein the sum of iridium and tungsten present ranges from about 16 to 19.
摘要翻译：一种火花塞及其制造方法，其特征在于，火花塞包括采用铆钉或球体形式的铂合金尖端部分。尖端部分在退火炉中在约700-140℃的温度下退火约5-30分钟之间的时间。退火的尖端部分然后被电阻焊接到火花塞的电极。退火使尖端部分具有增加的耐腐蚀性和铅侵蚀性。火花塞尖端材料的优选实施例包括80％的铂-20％铑; 80％铂-20％铱; 96％铂-4％钨; 和Pt（bal）-Ir（a）％-W（b）％，其中“a”为约15至19重量％，“b”为约1至4重量％，余量包括的铂和入射杂质，其中存在的铱和钨的总和范围为约16至19。

3. 发明授权

US5980345A Spark plug electrode having iridium based sphere and method for manufacturing same 失效
标题翻译：具有铱基球体的火花塞电极及其制造方法
公开(公告)号：US5980345A
公开(公告)日：1999-11-09
申请号：US114448
申请日：1998-07-13
申请人： Chin-Fong Chang , Richard Dale Taylor , Lee Randall Franz , Edgar Arnold Leone
发明人： Chin-Fong Chang , Richard Dale Taylor , Lee Randall Franz , Edgar Arnold Leone
IPC分类号： C23C18/44 , C23C10/28 , H01T13/20 , H01T13/28 , H01T13/39 , H01T21/02
CPC分类号： H01T13/39 , H01T21/02
摘要： A spark plug and method of making same, wherein the spark plug includes an iridium alloy tip portion which may take the form of a rivet or a sphere. The tip portion is coated with platinum, annealed and then resistance welded to a nickel-based electrode of the spark plug. The platinum coating helps to prevent cracks at the welding joint which might otherwise occur due to the differing coefficients of thermal expansion of the iridium-based alloy tip portion and the nickel-based alloy electrode. The iridium alloy tip portion is further not susceptible to attack by lead or combustive gases and therefore increases the life of the spark plug significantly.
摘要翻译：一种火花塞及其制造方法，其中，所述火花塞包括铱合金尖端部分，其可以呈铆钉或球体的形式。尖端部分涂覆铂，退火然后电阻焊接到火花塞的镍基电极上。铂镀层有助于防止由于铱基合金尖端部分和镍基合金电极的不同的热膨胀系数而在焊接接头处产生裂纹。铱合金尖端部分不易受铅或可燃气体的侵害，因此大大增加火花塞的使用寿命。

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