Method of manufacturing heavy-wall seamless steel pipe
    117.
    发明授权
    Method of manufacturing heavy-wall seamless steel pipe 有权
    重型无缝钢管制造方法

    公开(公告)号:US08845830B2

    公开(公告)日:2014-09-30

    申请号:US13354609

    申请日:2012-01-20

    申请人: Kunio Kondo Yuji Arai

    发明人: Kunio Kondo Yuji Arai

    摘要: A steel pipe with a wall thickness over 30 mm is subjected to heat treatment of quenching and tempering using a temperature range of at least not less than 750° C. during the heating stage, makes it possible to obtain a heavy-wall seamless steel pipe having excellent toughness by resulting grain refinement. Quenching is by performing water cooling after heating the steel pipe to a temperature in the range of not less than 900° C. to not more than 1000° C. by using, as a heating means, induction heating at a frequency of not more than 200 Hz. Tempering is performed at a temperature in the range of not less than 500° C. to not more than 750° C. Preferably, after the heating by induction heating, a soaking treatment is performed in the temperature range of not less than 900° C. to not more than 1000° C. for 10 minutes or less followed by water cooling.

    摘要翻译: 在加热阶段期间,使用壁厚30mm以上的钢管进行淬火回火热处理,至少不低于750℃的温度范围,可以获得厚壁无缝钢管 由于晶粒细化而具有优异的韧性。 淬火是在将钢管加热至不低于900℃至不超过1000℃的温度下进行水冷,通过以加热方式使用频率不大于 200 Hz。 回火在不低于500℃至不超过750℃的温度下进行。优选地,在通过感应加热加热之后,在不低于900℃的温度范围内进行均热处理 在1000℃以上10分钟以下,然后水冷却。

    FIXING DEVICE AND IMAGE FORMING APPARATUS
    118.
    发明申请
    FIXING DEVICE AND IMAGE FORMING APPARATUS 有权
    固定装置和图像形成装置

    公开(公告)号:US20140270872A1

    公开(公告)日:2014-09-18

    申请号:US14141334

    申请日:2013-12-26

    IPC分类号: G03G15/20

    摘要: A fixing device includes a fixing rotary body rotatable in a predetermined direction of rotation and a heater disposed opposite and heating the fixing rotary body. An opposed body contacts the fixing rotary body to form a fixing nip therebetween through which a recording medium is conveyed. A heat shield is movable in a circumferential direction of the fixing rotary body and interposed between the heater and the fixing rotary body to shield the fixing rotary body from the heater. A driver is connected to the heat shield to drive and move the heat shield between a shield position where the heat shield is interposed between the heater and the fixing rotary body to shield the fixing rotary body from the heater and a retracted position where the heat shield is retracted from the shield position. A reinforcement is mounted on a long edge of the heat shield.

    摘要翻译: 定影装置包括可沿预定旋转方向旋转的定影旋转体和与该固定旋转体相对地加热的加热器。 相对的体接触固定旋转体以在其间传送记录介质的定影辊隙。 隔热罩可以在固定旋转体的圆周方向上移动并插入在加热器和定影旋转体之间,以将定影旋转体屏蔽到加热器上。 驱动器连接到隔热罩,以驱动和移动隔热罩,其中隔热板插入在加热器和定影旋转体之间的屏蔽位置,以将定影旋转体屏蔽到加热器上,并且其中热屏蔽 从屏蔽位置缩回。 加强件安装在隔热罩的长边上。