Aisin Seiki Kabushiki Kaisha

Agency of Industrial Science and Technology

National Industrial Research Institute of Nagoya

Other

Ministry of International Trade & Industry

Agency of Industrial Science and Technology Ministry of International

Yoshinori Nishida

Shoichi Kume

Yasuhiro Enya

Tsunemichi Imai

Haruo Yoshida

Kazutaka Suzuki

Akinari Ishikawa

Takashi Sakurai

Takao Choh

Suk-Won Lim

Hiromi Matsubara

Tatsuya Hara

The present invention provides a cubic boron nitride-based sintered material excellent in durability and usable for a cutting tool material capable of carrying out high speed cutting of at least a high grade cast iron represented with a Ni-Resist cast iron and an austempered cast iron and having a long life. The present invention further provides a method for manufacturing the cubic boron nitride-based sintered material. The method for the production of a cubic boron nitride-based sintered material includes preparing a starting mixture by mixing particles of cubic boron nitride with a binding powders based on the system of TiCN, Si N , Al O , and Cr N, wherein x varyies from 1 to 2.7; and subjecting the starting mixture to a sintering process under pressure and at the same time at a high temperature; and recovering a sintered product.

Cubic boron nitride-based sintered material and manufacture thereof

The present invention relates to a large deformation apparatus for metal-based materials that comprises a mold (A), a support mechanism (B) for supporting the mold (A), and a rotary mechanism (C) for rotating the mold (A), wherein the mold (A) comprises a mold body (,), four holes (,) that pass through the mold body (,) and intersect in its interior, and engagement means (3,) for engaging the rotary mechanism (C), each hole (,) being provided with a punch (,) that can slide or otherwise move with friction in relation to the hole (,) and that extends from the end face of the mold body (,) to the intersection of the holes (,); the support mechanism (B) comprises restraint plates (6,), (6,), and (6,) for restraining the external end faces of the mold body (,) having holes (,), and holding plates (7,) and (7,) for holding the mold body (,); and the rotary mechanism (C) comprises engagement means (3,) for engaging the engagement means (3,), rotary means (,), connection means (,) for connecting the engagement means (3,) and the rotary means (,), and to a method for applying large deformation to a metal-based material with the aid of the apparatus, and further to a metal-based material subjected to large deformation by the method.

Large deformation apparatus, the deformation method and the deformed metallic materials

The purpose of the present invention is to provide a titanium nitride aluminum based sintered material having excellent durability and able to be cheaply produced and cut spheroidal graphite cast iron at high speed and be used as a cutting tool material having a long life, and a method of production the same. The present invention resides in a production method of a titanium nitride aluminum based sintered material characterized in that powder of Ti.sub.(1-x) Al.sub.x N (x=0.05.about.0.70) is sintered. Said x is preferably set to a range from 0.05 to 0.15 or from 0.50 to 0.70. 0.2 to 11.1% of an additive by volume constructed by TiO.sub.y (y=1.about.2) and/or Al.sub.2 O.sub.3 is preferably externally added to the above titanium nitride aluminum based sintered material.

Titanium nitride aluminum based sintered material and its production

The purpose of the present invention is to provide a cubic boron nitride based sintered material having excellent durability and capable of cutting at least spheroidal graphite cast iron at high speed and usable in a cutting tool having a long life, and a production method of this cubic boron nitride based sintered material. The present invention resides in a production method of a cubic boron nitride based sintered material characterized in that a mixing raw material is produced by mixing powder of Ti.sub.(1-x) Al.sub.x N(x=0.05.about.0.70) and the powder of a cubic boron nitride, and is next sintered. A compounding ratio of the above mixing raw material is preferably set such that this mixing raw material includes 10 to 90% of the above Ti.sub.(1-x) Al.sub.x N(x=0.05.about.0.70) by volume and 10 to 90% of the above cubic boron nitride by volume.

Cubic boron nitride based sintered material and its producing method

A method for the production of a superplastic Mg-based composite material comprises preparing a composite material consisting of ceramic particles formed of at least one compound selected from among TiC, AlN, Si.sub.3 N.sub.4, and TiB.sub.2 and a matrix formed of a magnesium alloy, dispersing the ceramic particles in the matrix, hot extruding the composite material, and then hot rolling the resultant extrudate; and a superplastic Mg-based composite material produced by the method.

Superplastic Mg-based composite material and method for production

A composite material containing dispersed particles is manufactured by disposing within a mold a porous shaped article of ceramic particles, then pouring a molten metal into the mold, compressing the contents of the mold, subsequently allowing the molten metal to solidify, and subjecting the resultant solidified composite to a plasticizing treatment.

Method for manufacture of composite material containing dispersed

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Kasugai, Japan

Yoshinori Nishida