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41. 发明专利

JPS63157707A WEAR RESISTANT COMPOSITE ROLL 失效
公开(公告)号：JPS63157707A
公开(公告)日：1988-06-30
申请号：JP30179386
申请日：1986-12-19
申请人： HITACHI METALS LTD
发明人： MARUTA KENJI , OKITSU TOSHIO
IPC分类号： B21B27/00 , B23K35/30 , C22C19/05 , C22C29/06 , C22C29/08 , C22C29/10 , C22C32/00
摘要： PURPOSE:To obtain a wear resistant rolling roll which is soundly manufactured and generates no crack in build-up welding by power build-up welding a mixture of powders of a specific component alloy and hard particles on the surface of a base material of an austenitic stainless steel. CONSTITUTION:Hard particles of 10-300mum dia. composed of 1 or >=2 kinds among carbides of elements of the IVA, VA, VIA groups in the periodic table is mixed by 10-50%, by vol., into powders of an allow composed of, by wt., 5.0-20% Cr, 1.0-5.0% Si,

42. 发明专利

JPS63144871A POSITIONER FOR POWDER BUILD-UP OF BIAXIAL CYLINDER 失效
公开(公告)号：JPS63144871A
公开(公告)日：1988-06-17
申请号：JP29156286
申请日：1986-12-09
申请人： HITACHI METALS LTD
发明人： OKITSU TOSHIO , SAKATA YOSHIHIRO
IPC分类号： B23K9/04 , B23K37/04 , B23K37/047
摘要： PURPOSE:To improve the product quality and to increase the working efficiency by rotating a driving device where a heating furnace is held by a chucking mechanism while supporting from four directions a cylinder barrel charged from a charging port of the heating furnace by supporting rods passed through a furnace wall of the heating furnace. CONSTITUTION:The biaxial cylinder 1 charged from the charging port 6 of the heating furnace 5 is supported from the four directions by the supporting rods 7 passed through the furnace wall of the heating furnace 5. A chuck part 8 to hold one edge of the heating furnace 5 is rotated by the driving device 19 via a base 12, a flange 13, etc. Since the cylinder barrel can be rotated with high accuracy while being heated, the excellent powder building-up can be performed by a device with this constitution.

43. 发明专利

JPS63144023A PLUNGER FOR TRANSFER MOLDING MACHINE 失效
公开(公告)号：JPS63144023A
公开(公告)日：1988-06-16
申请号：JP29156386
申请日：1986-12-09
申请人： HITACHI METALS LTD
发明人： MARUTA KENJI , OKITSU TOSHIO
IPC分类号： B23K9/04 , B29C45/02 , B29C45/53 , B29C45/58
摘要： PURPOSE:To provide a plunger for an inexpensive transfer molding machine, which is superior in wear resistance, by a method wherein a side sliding face of the plunger is made a build-up layer where hard particles are held through dispersion on a substrate composed of a Fe group alloy or Fi group alloy or Co group alloy or alloy of those through build-up welding of a powdery material. CONSTITUTION:A build-up layer 2a is formed on a side sliding face after a plunger matrix heat-treated and then a pressurizing face 2c of the tip is plated with bard chromium. An alloy of a generally known ingredient is used as an alloy for a substrate and WC, TiC, TiN, TiB2, VC, SiO2 are mentioned as hard particles. A weld penetration rate is extremely low so that it is 5% or lower and delicate control in a thickness of a build-up layer is possible, in build-up welding of a powdery material. As the quality of the material can be selected regardless of manufacturing of a welding rod for the build-up welding of the powdery material, manufacturing of far highly efficient plunger is possible.

44. 发明专利

JPS6386825A GAS BLOW PIPE 失效
公开(公告)号：JPS6386825A
公开(公告)日：1988-04-18
申请号：JP23004486
申请日：1986-09-30
申请人： HITACHI METALS LTD
发明人： FURUSHIMA SEISHI , OKITSU TOSHIO , HARAFUJI KAZUYOSHI
IPC分类号： C21C7/072 , C22B9/05 , F27D3/14
摘要： PURPOSE:To form fine bubbles and to improve degassing efficiency by mounting porous packing materials into the blow-off ports of a gas blow pipe and constituting respective parts of Si3N4 ceramics or sialor specified in bending strength, density and thermal impact temp. CONSTITUTION:The blow-off ports 5 are screwed to the other end of a distribution rod 4 of the gas blow pipe 1 and porous refractories as the packing materials 6 are mounted into the space parts at the ends of the ports 5. The blown gas passes the microgaps of the materials 6 in the ports 5 and disintegrates the bubbles formed in a molten metal to the finer bubbles. The degassing efficiency is thus improved. The Si3N4 ceramics or sialor is used as the material for the respective parts to constitute said pipe 1. The material the bending strength of which is >=50kg/mm , the density is >=95% of theoretical density, and the thermal impact temp. by an underwater charging method is DELTAT=>=400 deg.C is used as said material. The reduction in the size and weight of the pipe 1 and the extension of the life thereof are thereby attained.

45. 发明专利

JPS6375622A MOLTEN METAL SURFACE DETECTION ROD 失效
公开(公告)号：JPS6375622A
公开(公告)日：1988-04-06
申请号：JP21973986
申请日：1986-09-19
申请人： HITACHI METALS LTD
发明人： FURUSHIMA SEISHI , OKITSU TOSHIO , HARAFUJI KAZUYOSHI
IPC分类号： B22D17/30 , B22D18/08 , G01F23/24
摘要： PURPOSE:To obtain a molten metal surface detection rod having the corrosion resistance and long life to be used for the molten bath of a non-ferrous metal, capable of detecting the position of the surface of the molten bath and generating no contamination of the surface of the molten bath due to meltdown, by constituting said detection rod of a silicon nitride sintered body obtained by sintering a silicon nitride powder having a sintering aid and a conductivity imparting agent added thereto. CONSTITUTION:A molten metal surface detection rod 1 is constituted of a silicon nitride sintered body obtained by sintering a silicon nitrode powder having a sintering aid and a conductivity imparting agent added thereto. As the sintering aid, one or more kinds of MgO, Al2O3, Y2O3, SiO2, CaO or BeO is used in an amount of 5vol% or less. As the conductivity imparting agent, one or more kind of carbide, nitride, carbonitride or boride of Ti, Ta, Hf, W, Mo, Zr or Cr is used in an amount of 25vol% or less.

46. 发明专利

JPS62289358A CYLINDER FOR DIE CASTING 失效
公开(公告)号：JPS62289358A
公开(公告)日：1987-12-16
申请号：JP13326786
申请日：1986-06-09
申请人： HITACHI METALS LTD
发明人： FURUSHIMA SEISHI , OKITSU TOSHIO , NOGAMI SHINGO
IPC分类号： B22D17/20 , B29C45/62
摘要： PURPOSE:To improve the durability of a cylinder and the yield of a product by forming at least the inside surface of the cylinder of silicon nitride ceramics or ceramics consisting of Sialon and having specific bending strength, density, etc. CONSTITUTION:The ceramic cylinder 1 is fixed into a plate 4 of a casting machine and a piston 2 is slid in the cylinder 1. A molten nonferrous metal such as Al is cast into a cavity 8 to execute die casting. The silicon nitride ceramics or the ceramics consisting of Sialon is used for the cylinder 1 and the bending strength thereof is specified to>=50kg/cm , the density to >=90% of the theoretical density and the thermal impact resistance T of an underwater throwing method to >=300 deg.C in order to improve the resistance to wear and corrosion. The resistance to wear, corrosion and seizure and heat insulating characteristic of the inside peripheral face of the cylinder are improved by the above-mentioned method. The durability of the cylinder 1 and the yield of the product are, therefore, improved.

47. 发明专利

JPS6250066A MOLD FOR BUILDING UP BY CONTINUOUS TINKERING 失效
公开(公告)号：JPS6250066A
公开(公告)日：1987-03-04
申请号：JP18916185
申请日：1985-08-28
申请人： HITACHI METALS LTD
发明人： OKITSU TOSHIO , OSHIMA MASAHIKO
IPC分类号： B22D11/00 , B22D11/04 , B22D11/059 , B22D19/08
摘要： PURPOSE:To prevent the transverse crack of a build-up layer by the construction consisting in extending upward the top end face of a graphite sleeve from the top surface of a water cooling type jacket to project the jacket and imposing a refractory flask onto the projecting graphite sleeve. CONSTITUTION:The mold for building up is constituted by extending and projecting the top end face of the sleeve 2 consisting of a graphite material to the position upper than the top surface of the water cooling type jacket 3 and imposing the refractory flask 1 on the sleeve 2. A base metal 5 is positioned into the mold space and a molten metal 6 is poured therein. The material 5 is gradually lowered while the molten metal 6 is stirred by an induction heating coil 4, then the solidification of the molten metal 6 is always started in the region of the graphite sleeve 2 and thinkering progresses. The transverse crack of the build-up layer is thereby prevented.

48. 发明专利

JPS61195772A METHOD FOR EXECUTING CONTINUOUSLY PADDING TO PERIPHERY OF BASE MATERIAL 失效
公开(公告)号：JPS61195772A
公开(公告)日：1986-08-30
申请号：JP3609285
申请日：1985-02-25
申请人： HITACHI METALS LTD
发明人： SANO GIICHI , OKITSU TOSHIO
IPC分类号： B22D19/08 , B22D11/00 , B22D19/10 , B22D19/16
摘要： PURPOSE:To execute continuously a sound padding at a low cost by immersing partially an induction heating coil in a molten metal between a flask and a base material, and welding the base material and the molten metal by heating, when forming a padding layer in the periphery of the base material by a tinkering padding method. CONSTITUTION:A padding base material 2 is inserted with a gap into a flask 1 which serves as a forced cooling die lined with graphite 11. A ring-shaped induction heating coil 3 is attached to the periphery of the base material 2, and a molten metal 7 is charged so as to be immersed into a part of the coil 3. The molten metal 7 is quenched and coagulated by the flask 1, but the vicinity of the coil 3 holds a molten state. On the other hand, with regard to the surface of the base material 2, too, a part which is not immersed in the molten metal 7 is heated by the coil 3, and the surface of the base material 2 is heated in the vicinity of a meniscus part 5 of the base material 2 and the molten metal 7, therefore, the base material 2 and the molten metal 7 are welded completely. In this state, a descent of the base material 2 and charging of the molten metal are executed successively, and a padding layer 6 is formed on the surface of the base material 2.

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