公开(公告)号：US06808571B2

公开(公告)日：2004-10-26

申请号：US09930172

申请日：2001-08-16

申请人： Hiromasa Tanaka ,  Kikuo Maeda ,  Tosiya Kinami ,  Sadayuki Nakamura

发明人： Hiromasa Tanaka ,  Kikuo Maeda ,  Tosiya Kinami ,  Sadayuki Nakamura

IPC分类号： C21D940

CPC分类号： C23C8/80

摘要： A heat resistant carburized rolling bearing component is formed of a steel material at least containing, as alloy elements in a matrix, by mass %, at least 0.1% and at most 0.4% of C, at least 0.3% and at most 3.0% of Si, at least 0.2% and at most 2.0% of Mn, at most 0.03% of P, at most 0.03% of S, at least 0.3% and less tan 2.5% of Cr, at least 0.1% and less than 2.0% of Ni, at most 0.050% of Al, at most 0.003% of Ti, at most 0.0015% of O and at most 0.025% of N, and a remaining part of Fe and an unavoidable impurity, and the bearing component is prepared by performing carburizing carbo-nitriding process followed by quenching, and after quenching, tempering at a tempering temperature of at least 200° C. and at most 350° C., and surface hardness after tempering process is at least HRC57. Thus, an inexpensive heat resistant carburized rolling bearing component and manufacturing method thereof can be obtained, which realizes superior rolling fatigue life, wear resistance and dimensional stability under the environment involving foreign matters and high temperature.

摘要翻译： 耐热渗碳滚动轴承部件由钢材形成，所述钢材料至少含有基质中的合金元素，以质量％计至少0.1％和至多0.4％的C，至少0.3％和至多3.0％ Si，Mn的至少0.2％和至多2.0％，最多0.03％的P，至多0.03％的S，至少0.3％和更少的tan 2.5％的Cr，至少0.1％和小于2.0％的 Ni，Al：0.050以上，Ti：0.003％以下，O：0.0015％以下，N：0.025％以下，Fe：剩余部分，不可避免的杂质：0.008％以下，通过渗碳 碳氮化处理后淬火，淬火后回火温度至少为200℃，最高为350℃，回火处理后的表面硬度为HRC57以上。 因此，可以获得廉价的耐热渗碳滚动轴承部件及其制造方法，其在涉及异物和高温的环境下实现优异的滚动疲劳寿命，耐磨性和尺寸稳定性。