公开(公告)号：US5391856A

公开(公告)日：1995-02-21

申请号：US927645

申请日：1992-09-09

申请人： Katsuhiro Minamida ,  Motoi Kido ,  Fumihiko Nishizawa

发明人： Katsuhiro Minamida ,  Motoi Kido ,  Fumihiko Nishizawa

IPC分类号： B21B27/00 ,  B22D11/06 ,  B27K26/00

CPC分类号： B23K26/0823 ,  B21B27/005 ,  B22D11/0651 ,  B23K26/0084

摘要： A cooling drum for use in casting a thin cast strip is rotated about its axis while a laser beam having a wavelength of from 0.30 .mu.m to 1.07 .mu.m is irradiated onto a peripheral surface of the drum to form dimple therein. At this time, at least one of the oscillation period of the laser beam, the laser output and the divergence angle of the beam is controlled to assure that each dimple has a depth of no less than 50 .mu.m and a diameter of less than 500 .mu.m and the distance measured between the centers of each adjacent pair of dimples ranges from 1.05 times to 5 times the dimple diameter. At least one of the steps of adjusting the oscillation period of the laser beam and causing the laser beam to scan the peripheral surface of the drum in the axial direction thereof is conducted to cause a irregular deviation of less than 20% in the density of distribution of the thus formed dimples, whereby the formation of waves in the surface of the molten metal placed in contact with the drum during the casting of the thin cast piece is suppressed, to thereby assure a continuous casting of thin cast piece having good surface characteristics and condition.

摘要翻译： PCT No.PCT / JP92 / 00006 Sec。 371日期：1992年9月9日 102（e）1992年9月9日PCT PCT 1992年1月9日PCT公布。 出版物WO92 / 11960 日期：1992年7月23日。用于铸造薄铸造带的冷却鼓围绕其轴线旋转，而具有0.30μm至1.07μm波长的激光束照射到滚筒的外周表面上以形成 其中的凹坑。 此时，控制激光束的振荡周期，激光输出和光束的发散角中的至少一个，以确保每个凹坑的深度不小于50μm，直径小于500 在每个相邻凹坑对的中心之间测量的距离为凹坑直径的1.05倍至5倍。 进行调整激光束的振荡周期并使激光束沿其轴向扫描滚筒的周面的步骤中的至少一个进行，使得分布密度的不规则偏差小于20％ 这样形成的凹坑，从而抑制了铸造期间与滚筒接触的熔融金属表面中的波浪的形成，从而确保连续铸造具有良好表面特性的薄铸件， 条件。