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1. 发明专利

JPH08225917A THERMAL SPRAYING METHOD ONTO MOLD FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH08225917A
公开(公告)日：1996-09-03
申请号：JP15493395
申请日：1995-06-21
申请人： NIPPON STEEL CORP , DAIICHI METEKO KK
发明人： HAMAYA HIDEKI , ICHIYAMA YASUTOMO , KITAGUCHI SABURO , OBARA MASAHIRO , YURIOKA NOBUTAKA , KUROKI MASATSUGU , SHIMA TETSUO , KASAI YOSHINORI , TANNO HITOSHI , SAKAMOTO TOKUHACHIROU , SASAKI MITSUMASA , NAKAGAWA MASAHIRO , ISHIDA MAKOTO
IPC分类号： C23C4/12 , B22D11/04 , B22D11/059 , C23C26/02 , C23C28/00
摘要： PURPOSE: To provide the thermal spraying technique to a mold for continuous casting, particularly to the long sides thereof, in which even if fusing treatment after the thermal spraying is not executed, the high adhesion is obtained without exfoliating the film. CONSTITUTION: After forming Ni-electroplating having 0.1-2mm thickness to a part or the whole of the mold surface composed of copper or copper alloy, blast treatment is executed onto this plated surface so as to become 2-8 Ra roughness. Successively, after heating the mold at 50-100 deg.C, the thermal spraying of an Ni base self-fluxing alloy composed of (1) 60-80% Ni, 15-25% Cr, 1.5-5% B, 2-6% Si, 0.5-1% C, 3-4% Fe or (2) 5-10% Cr, 1.5-3.0% B, 2-4% Si, 0.09-0.60% C, 1.5-3.5% Fe and the balance Ni, and having 10-60μm grain diameter, is executed by using oxygen/hydrogen flame at 1300-2300m/s flame speed and thereafter, the film surface is finished to 1.6-6.3S Rmax.

2. 发明专利

JPH0881750A THERMAL SPRAYING METHOD TO CASTING MOLD FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH0881750A
公开(公告)日：1996-03-26
申请号：JP24343394
申请日：1994-09-13
申请人： NIPPON STEEL CORP
发明人： HAMAYA HIDEKI , ICHIYAMA YASUTOMO , KUROKI MASATSUGU , SHIMA TETSUO , TANNO HITOSHI , OBARA MASAHIRO , YURIOKA NOBUTAKA , KITAGUCHI SABURO , KASAI YOSHINORI
IPC分类号： C23C4/02 , B22D11/04 , B22D11/059 , C23C4/06 , C23C28/02
摘要： PURPOSE: To provide a thermal spraying method to a casting mold and more particularly to its long sides which are high in adhesion and films of which do not peel off even if a fusing treatment is not carried out after the thermal spraying. CONSTITUTION: Ni electroplating is formed at a thickness of 0.1 to 2mm in a part or the whole of the surfaces of the casting mold consisting of copper or copper alloy and thereafter, the plating surfaces are subjected to a blasting treatment of roughness Ra=2 to 4. An Ni-based self-fluxing alloy is then thermally sprayed at thickness of 0.1 to 0.6mm thereon. The components of the Ni-based self-fluxing alloy are composed of Ni=60 to 80%, Cr=8 to 33%, B=1.5 to 5%, Si=2 to 6%, C=0.3 to 1.5%, Fe=2 to 4% and the balance impurities. Thermal spraying is executed by flame thermal spraying utilizing oxygen/ kerosene at a flame speed of 1300 to 2300m/s. The surface of the Ni-based self-fluxing alloy after the thermal spraying is finished to Rmax=1.6 to 6.3S.

3. 发明专利

JPH032333A METHOD AND APPARATUS FOR ROTARY MELTING TREATMENT WITH LASER BEAM 失效
公开(公告)号：JPH032333A
公开(公告)日：1991-01-08
申请号：JP13304889
申请日：1989-05-26
申请人： NIPPON STEEL CORP
发明人： ICHIKO OSAMI , KASAI YOSHINORI , HIRANO KENJI
IPC分类号： C30B13/00 , C22B9/22
摘要： PURPOSE:To execute melting treatment for uniformizing quality of a metal, alloy and compound material and improving the characteristics by irradiating a cylindrical material to be worked with laser beam, melting almost to center shaft, rotating and shifting the material to be worked in order. CONSTITUTION:In the vacuum chamber, the cylindrical material 3 to be worked is irradiated with the laser beam 1 through a condensing lens and rotated with a rotary device 4, and output of the laser beam and rotating velocity of the material 3 to be worked are regulated so that the melting depth comes to almost equal to the radius of the material 3 to be worked. By this method, the melting part 6 and the solidified part 7 are developed, and the melting treatment is executed to a part of the material 3 to be worked as round disk state by turning one round. After turning one round, the material 3 to be worked is successively shifted together with the rotary device 4 in the axial direction with a shifting device 5 and shifted at the velocity corresponding to the rotating velocity while rotating the material 3 to be worked to execute the melting treatment. By this method, the melting treatment can be executed to the whole of material 3 to be worked to the inner part, and the quality is uniformized and the characteristics is improved, etc.

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