公开(公告)号：US5264053A

公开(公告)日：1993-11-23

申请号：US941262

申请日：1992-09-04

申请人： Masahiro Nakajima ,  Hisahiko Kusano ,  Isao Yoshida ,  Yoshio Hamajima ,  Hiroyuki Takeno

发明人： Masahiro Nakajima ,  Hisahiko Kusano ,  Isao Yoshida ,  Yoshio Hamajima ,  Hiroyuki Takeno

IPC分类号： B62D55/205 ,  C21D9/14 ,  C21D1/10 ,  C21D1/18

CPC分类号： C21D9/14 ,  B62D55/205

摘要： A production method for an endless track bushing wherein high-carbon low-alloy steel is selected as a bushing material, the bushing material is quench-hardened without pre-carburizing the bushing material, and then tempered. In the quench-hardening, the bushing material is induction-heated from an outside surface of the bushing material only so that an inside surface of the bushing material is heated to a temperature above and close to a transformation temperature of the high-carbon low-alloy steel, and then the heated bushing material is cooled from the outside surface of the bushing material only so that a residual compressive stress is produced at the inside surface of the bushing material when it has been cooled to an ambient temperature. The thus produced bushing has a high hardness throughout the entire cross section and a high toughness.

摘要翻译： 选择高碳低合金钢作为衬套材料的环形履带衬套的制造方法，将衬套材料淬火硬化而不对衬套材料进行预渗碳，然后回火。 在淬火硬化中，衬套材料仅从衬套材料的外表面进行感应加热，使得衬套材料的内表面被加热到高于和接近高碳低温转变温度的转变温度的温度， 合金钢，然后加热的衬套材料仅从衬套材料的外表面冷却，使得当衬套材料已被冷却到环境温度时，在衬套材料的内表面产生残留的压缩应力。 由此制造的衬套在整个横截面上具有高硬度和高韧性。

公开(公告)号：US5049207A

公开(公告)日：1991-09-17

申请号：US351438

申请日：1989-05-12

申请人： Takahiko Sahara ,  Hisahiko Kusano ,  Masayoshi Kaneko ,  Masahiro Nakajima ,  Toshihiko Sato

发明人： Takahiko Sahara ,  Hisahiko Kusano ,  Masayoshi Kaneko ,  Masahiro Nakajima ,  Toshihiko Sato

IPC分类号： B62D55/21 ,  C21D1/10 ,  C21D9/14 ,  C21D9/40

CPC分类号： C21D1/10 ,  C21D9/14 ,  Y02P10/253

摘要： A heat treatment process applicable to bushings used in tracks of endless track tractor comprises heating a bushing made of middle carbon low alloy steel material from the outer peripheral surface thereof until the inner circumferential surface thereof achieves a temperature range of Ac.sub.3 .ltoreq.T.ltoreq.Ac.sub.3 +50.degree. C. where T is the temperature in .degree.C. of the heated circumferential surface and Ac.sub.3 is the transformation temperature in .degree.C. of the steel. The heating is accomplished with an induction heating whereafter the steel is cooled from the outer peripheral surface, resulting in hardening the same along the entire thickness thereof. The treatment is followed by tempering of the steel.

摘要翻译： 适用于环形履带式拖拉机轨道中使用的衬套的热处理工艺包括从其外周表面加热由中碳低合金钢材料制成的衬套，直到其内圆周表面达到Ac 3的温度范围， = Ac3 + 50℃，其中T是加热的圆周表面的℃的温度，Ac 3是钢的转化温度（℃）。 通过感应加热进行加热，之后从外周面冷却钢，使其沿其整个厚度硬化。 处理之后是钢的回火。