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1. 发明授权

US4495004A Process for high-temperature carburizing treatment of track bushes for tractors or tracked vehicles 失效
标题翻译：用于拖拉机或履带式车辆的履带式高温渗碳处理工艺
公开(公告)号：US4495004A
公开(公告)日：1985-01-22
申请号：US543727
申请日：1983-10-20
申请人： Walter Grilli , Franco De Meo , Ivan Franchini
发明人： Walter Grilli , Franco De Meo , Ivan Franchini
IPC分类号： C21D1/78 , C23C8/22 , C23C8/80 , C23C11/10
CPC分类号： C23C8/80 , C21D1/78 , C23C8/22
摘要： Process for the production of track bushes for tractors and track vehicles, with resultant savings in energy, shorter treatment times and consistently high product quality. A plurality of low carbon boron steel bushes are assembled as a charge in a basket. The charge is preheated in a pretreatment chamber of a furnace having a carburizing chamber, with combustion gases from the carburizing chamber. Then the charge is transferred to this carburizing chamber, and is carburized at a temperature in excess of 900.degree. C., preferably 950.degree. to 980.degree. C., for 10 to 17 hours. The charge is cooled in a third chamber of this furnace, to a temperature of 820.degree.-860.degree. C. maintained by means of combustion gas leaving the carburizing chamber. The bushes are extracted from the charge one at a time by a robot and are directly individually quenched. The ends of the bushes are tempered in an induction furnace at 550.degree.-600.degree. C. for 10 to 25 seconds, and then the bushes are emulsion cooled. The bushes are totally stress relieved for 1-2 hours at 180.degree.-200.degree. C. in a continuous furnace fed by hot waste gases from the first-mentioned furnace.
摘要翻译：为拖拉机和履带车辆生产履带式履带的过程，节省能源，缩短处理时间，持续提高产品质量。多个低碳硼钢衬套作为电荷装配在篮子中。在具有渗碳室的炉的预处理室中，将来自渗碳室的燃烧气体预充电。然后将电荷转移到该渗碳室，并在超过900℃，优选950-990℃的温度下渗碳10至17小时。将电荷在该炉的第三室中冷却至通过离开渗碳室的燃烧气体维持的820-860℃的温度。灌木丛由机器人一次从充电中抽出，并直接单独淬火。衬套的端部在550℃-600℃的感应炉中回火10至25秒，然后将衬套乳化冷却。在由前述炉子的热废气进料的连续炉中，灌木丛在180℃-200℃下完全释放1-2小时。

2. 发明授权

US4419152A Process for direct heat treatment of track links for tractors or tracked vehicles 失效
标题翻译：用于拖拉机或履带式车辆的轨道连接的直接热处理工艺
公开(公告)号：US4419152A
公开(公告)日：1983-12-06
申请号：US388715
申请日：1982-06-15
申请人： Walter Grilli , Franco De Meo , Ivan Franchini
发明人： Walter Grilli , Franco De Meo , Ivan Franchini
IPC分类号： C21D1/02 , C21D9/00 , C21D8/00
CPC分类号： C21D1/02 , C21D9/0087
摘要： Process for the manufacture of steel track links for tracked vehicles, comprising forging steel track links at an initial forging temperature of 1150.degree.-1200.degree. C. for 45-60 seconds with a finish forging temperature of 950.degree.-1050.degree. C., subjecting the links thus-produced to initial cooling at a rate of 2.degree.-4.degree. C./s to a temperature of 720.degree.-830.degree. C., maintaining the links at a temperature of 800.degree.-850.degree. C. for 2-3 minutes, again cooling the links at a rate of 10.degree.-15.degree. C./s to a second temperature of 180.degree.-380.degree. C., and maintaining the links at this second temperature for a period of 10-20 minutes, the steel having the following weight percent compositions:C: 0.30-0.38Mn: 1.00-1.50Cr: up to 0.60Si: 0.15-0.35S+P: about 0.06balance essentially iron.
摘要翻译：用于制造用于履带车辆的钢轨链节的方法，包括在初始锻造温度为1150°-1200℃锻造钢轨连杆45-60秒，锻造温度为950-105℃，将这样生成的链接以2℃-4℃/ s的速率初始冷却至720℃-830℃的温度，将链节保持在800-850℃的温度下， 3分钟，再次以10℃-15℃的速度将链节冷却至180-380℃的第二温度，并将链节保持在该第二温度10-20分钟，具有以下重量百分比组成的钢：C：0.30-0.38 Mn：1.00-1。

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