Agency of Industrial Science and Technology

Ministry of International Trade & Industry

Nisshin Flour Milling Co., Ltd.

Other

Aisin Seiki Kabushiki Kaisha

National Industrial Research Institute of Nagoya

Agency of Industrial Science and Technology Ministry of International

Reed Co., Ltd

Shoichi Kume

Haruo Yoshida

Kazutaka Suzuki

Yoshinori Nishida

Michihide Machida

Yukiyoshi Yamada

Satoshi Akiyama

Yoshiaki Hamada

Yasuhiro Enya

Eisuke Kuroda

Tadashi Fuyuki

Akinari Ishikawa

Yoshio Tasaki

Takashi Sakurai

Shiro Ikuta

Masamitu Ishikawa

Tsunemichi Imai

Kenichi Kimura

Haruo Yoshido

Yukio Sumita

Tadakatsu Nabeya

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

A process for producing a ceramic-base sinter, comprising sintering coated ceramic particles wherein the particles are prepared for sintering by the steps of: dispersing a powder of ceramic core particles in a gaseous atmosphere to form a mixture of a gas and particles in a powder of highly dispersed core particles; charging a precursor for the coat forming substance that has been formed via the vapor phase and/or a precursor for the coat forming substance in a vapor-phase state and the mixture of the gas and the powder of highly dispersed core particles that have a predetermined dispersity according to the average diameter of the core particles in a coating start region of a coating space; coating the surfaces of the core particles with the coat forming substance by allowing the precursor to contact and/or impinge against the core particles; shaping and sintering the thus coated ceramic core particles or a mixture containing them under appropriate sintering conditions. The ceramic-base sinter of high performance thus produced is uniform, dense, and sintered firmly to provide a fine and highly controlled microstructure.

Coated ceramic particles, a ceramic-base sinter and a process for

A process for producing a metal-base sinter, comprising sintering coated metal particles wherein the particles are prepared for sintering by the steps of: dispersing a powder of metal core particles in a gaseous atmosphere to form a mixture of a gas and particles in a powder of highly dispersed core particles; charging a precursor for the coat forming substance that has been formed via the vapor phase and/or a precursor for the coat forming substance in a vapor-phase state and the mixture of the gas and the powder of highly dispersed core particles that have a predetermined dispersity according to the average diameter of the core particles in a coating start region of a coating space; coating the surfaces of the core particles with the coat forming substance by allowing the precursor to contact and/or impinge against the core particles; shaping and sintering the thus coated metal core particles or a mixture containing them under appropriate sintering conditions. The metal-base sinter of high performance thus produced is uniform, dense, and sintered firmly to provide a fine and highly controlled microstructure.

Coated metal particles, a metal-base sinter and a process for producing

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 powder of diamond or high-pressure phase boron nitride core particles charged into a coating space as it is dispersed, and a precursor of a coat forming substance allowed to contact and/or impinge against the particles in the powder of core particles so that their surfaces are covered with the coat forming substance, thereby preparing coated diamond or high-pressure phase boron nitride particles which are subsequently sintered. The thusly produced diamond of high-pressure phase boron nitride sinter is composed of coated core particles of high performance that are superhard, uniform, dense and sintered firmly, and which have a controlled microstructure.

Diamond sinter, high-pressure phase boron nitride sinter, and processes

A cubic boron nitride-containing high-density inorganic composite is prepared by mixing cubic boron nitride with a powdered inorganic compound capable of forming a rigid sintered article having a density of at least 85% and a Vickers hardness of at least 800, which does not promote the conversion of cubic boron nitride into graphite-type phase boron nitride (hBN). The powder mixture is compressed into a mold, and fired at low pressure of between 1,000-2,000 MPa, at a temperature of not more than 1,500.degree. C., under which conditions the cubic boron nitride does not convert to hBN, but is sufficiently metastable to permit the formation of the high-density inorganic composite.

Method for production of cubic boron nitride-containing high-density

A cubic boron nitride-containing high-density inorganic composite sintered article is produced by a method which essentially consists of preparing a mixture of a cubic boron nitride powder with an inorganic compound powder capable of forming a high-rigidity sintered article under the conditions permitting the cubic boron nitride to remain in a substantially metastable, though not thermodynamically stable, state, a mixture of an inorganic compound-coated cubic boron nitride powder with an inorganic compound powder, or an inorganic compound-coated cubic boron nitride powder, and sintering the mixture of the cubic boron nitride powder with an inorganic compound powder, the mixture of the inorganic compound-coated cubic boron nitride powder with an inorganic compound powder or an inorganic compound-coated cubic boron nitrides powder, under the conditions of not more than 2,000 MPa of pressure and not more than 1,500.degree. C. of temperature for permitting the cubic boron nitride to remain in a substantially metastable, though not thermodynamically stable, state for a period incapable of causing conversion of the cBN into a graphite-type phase.

Method of production of cubic boron nitride-containing high-density

A sintered article of diamond is obtained by coating the surface of diamond particles with 30 to 0.1% by volume, based on the total volume of the diamond particles and aids, of at least one member selected from the group consisting of the transition metals of Groups 4a, 5a, and 6a in the Periodic Table of Elements and boron and silicon, and sintering the coated diamond particles under conditions of high pressure and high temperature, which sintered article consists of 70 to 99.8% by volume of diamond and 30 to 0.2% by volume of the carbide of the coating substance. A method for the production of the sintered article of diamond is also disclosed.

Sintered article of diamond and method for production thereof

An adhesive bandage used personally to cover a minor injury on a human body, especially on a finger or a toe thereof, comprises a bandage proper having an adhesive inside, a pad fixed to a substantially central portion of the inside of the bandage proper, and a protective paper having opposed end portions removably attached to the inside of the bandage proper. The protective paper has a central, greater part folded flatwise. The central greater part of the protective paper can be unfolded and has a sufficient length to provide, together with the bandage proper, an ample space through which a finger or a toe with a minor injury to be covered can be inserted, when the central greater part is unfolded. Another adhesive bandage for personal use comprises a bandage proper having an adhesive side, a pad fixed to a substantially central portion of the adhesive side of the bandage proper for directly covering a minor injury, a loop means having opposed end portions removably attached to opposed end portions of the adhesive side of the bandage proper, and a protective paper having a substantially central, greater part removably attached to the adhesive side of the bandage proper. The loop means has a sufficient length to form, together with the bandage proper, a loop which defines an expandable space through which fingers can be inserted.

Growing community of inventors

Tsushima, Japan

Shoichi Kume