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    • 3. 发明授权
    • Bearing steel
    • 轴承钢
    • US5256213A
    • 1993-10-26
    • US913699
    • 1992-07-16
    • Hiroshi NaraiTsutomu AbeKazuhiro Uemura
    • Hiroshi NaraiTsutomu AbeKazuhiro Uemura
    • C22C38/00G01N33/20
    • G01N33/20Y10S148/906
    • In order to produce bearing steels of long life and high reliability with a higher probability by utilizing parameters for cleanness evaluation that are related to the shortest life of bearings, in the present invention, the logarithmic decrease in the cumulative size distribution of oxide-type nonmetallic inclusions and the estimated maximum diameter of inclusion particles present per unit volume or unit area are determined from the particle size distribution of the oxide-type nonmetallic inclusions, and the cleanness of interest is specified on the basis of said logarithmic decrease or said estimated maximum inclusion diameter.
    • 为了通过利用与轴承的最短寿命相关的清洁度评估参数,以更高的可能性生产寿命长,可靠性高的轴承钢,在本发明中,氧化物型非金属的累积尺寸分布的对数减小 根据氧化物型非金属夹杂物的粒度分布确定夹杂物和每单位体积或单位面积存在的夹杂物的估计最大直径,并且基于所述对数减少或所述估计的最大夹杂物来规定感兴趣的清洁度 直径。
    • 4. 发明申请
    • Bearing steel,method for evaluating large-sized inclusions in the steel and rolling bearing
    • 轴承钢,钢和滚动轴承大型夹杂物的评估方法
    • US20060048576A1
    • 2006-03-09
    • US10498876
    • 2003-01-17
    • Akihiro KiuchiYutaka IshiiYouichi MatsumotoMasaru KawabeHiroshi NaraiNaoko Yokoyama
    • Akihiro KiuchiYutaka IshiiYouichi MatsumotoMasaru KawabeHiroshi NaraiNaoko Yokoyama
    • G01M13/04F16C19/00
    • G01N29/11F16C33/12F16C33/30F16C2204/60G01N29/2456G01N29/265G01N29/28G01N2291/014G01N2291/0234G01N2291/02836G01N2291/0421G01N2291/0422G01N2291/101G01N2291/2696
    • A first object is to provide a method for evaluating large-sized inclusions in a bearing steel. The method enables quantitative evaluation of large-sized inclusions even if the steel has a high degree of cleanliness. Further, a second object is to provide an appropriate bearing steel evaluated by the method for evaluating large-sized inclusions. Further, a third object is to provide a rolling bearing capable of eliminating short life products and cracked products and providing longer lifetime for entire bearings. In order to achieve the first object, a round bar formed of a bearing steel to be evaluated and an ultrasonic probe are placed in an ultrasonic transmission medium, and the size and number of large-sized inclusions that are present in the flaw detection volume are measured to estimate the existence probability of large-sized inclusions in the bearing steel to be evaluated. The second object is achieved by specifying large-sized inclusions that are present in the bearing steel in accordance with the method for evaluating large-sized inclusions. Further, to achieve the third object, a rolling bearing is manufactured from a seamless steel tube, as material, having a diameter of 180 mm or less and a wall thickness of 25 mm or less, and ensured that it does not include a defect having a length of 1 mm of more at its material stage.
    • 第一个目的是提供一种用于评估轴承钢中的大尺寸夹杂物的方法。 该方法能够对大尺寸夹杂物进行定量评价,即使钢具有高度的清洁度。 此外,第二个目的是提供通过用于评估大尺寸夹杂物的方法评估的合适的轴承钢。 此外,第三个目的是提供一种能够消除短寿命产品和破裂产品并为整个轴承提供更长寿命的滚动轴承。 为了实现第一个目的,将由待评估的轴承钢形成的圆棒和超声波探头放置在超声波传播介质中,并且存在于探伤体积中的大尺寸夹杂物的尺寸和数量是 测量以评估待评估的轴承钢中大尺寸夹杂物的存在概率。 第二个目的是通过根据用于评估大尺寸夹杂物的方法来指定存在于轴承钢中的大尺寸夹杂物来实现的。 此外,为了实现第三个目的,一种滚动轴承由直径为180mm以下且壁厚为25mm以下的无缝钢管作为材料制造,并且确保不包括具有 在其材料阶段的长度为1毫米。