8results about How to "Chipping resistance" patented technology

The present invention provides a surface-coated cutting tool comprising a coating film on a base, while the coating film comprises a hard layer constituted of a compound selected from a nitride, a carbonitride, an oxynitride and a carboxynitride of at least one primary element selected from a group consisting of the metals belonging to the groups 4a, 5a and 6a of the periodic table as well as B, Al and Si, and the hard layer satisfies the following: (a) (hmax−hf) / hmax is at least 0.2 and not more than 0.7, assuming that hmax represents the maximum indentation depth and hf represents the indentation depth (dent depth) after unloading in a hardness test according to nanoindentation, (b) the thickness of the hard layer is at least 0.5 μm and not more than 15 μm, and (c) the hardness according to nanoindentation is at least 20 GPa and not more than 80 GPa.

The present invention provides a surface-coated cutting tool comprising a coating film on a base, while the coating film comprises a hard layer constituted of a compound selected from a nitride, a carbonitride, an oxynitride and a carboxynitride of at least one primary element selected from a group consisting of the metals belonging to the groups 4a, 5a and 6a of the periodic table as well as B, Al and Si, and the hard layer satisfies the following: (a) (hmax−hf) / hmax is at least 0.2 and not more than 0.7, assuming that hmax represents the maximum indentation depth and hf represents the indentation depth (dent depth) after unloading in a hardness test according to nanoindentation, (b) the thickness of the hard layer is at least 0.5 μm and not more than 15 μm, and (c) the hardness according to nanoindentation is at least 20 GPa and not more than 80 GPa.

The present invention provides an improved 2 wet coating system. The present invention relates to a process for forming a multi layered coated film comprising the steps of: forming an uncured electrodeposition coated film on an electrically conductive substrate, applying an intermediate coating on the electrodeposition coated film, and then simultaneously heating and curing the uncured electrodeposition coated film and an uncured intermediate coated film, forming an uncured base coated film on the intermediate coated film, applying a clear top coating on the base coated film, and then simultaneously heating and curing the uncured base coated film and an uncured clear coated film; wherein the electrodeposition coating forms a self-stratifying coated film, and a dynamic glass transition temperature of a resin layer (alpha) in direct contact with the electrically conductive substrate and that of a resin layer (beta) in direct contact with the intermediate coated film are controlled.

There is provided a tool for friction stir welding having excellent wear resistance and chipping resistance. The tool for friction stir welding according to the present invention includes a base material, the base material includes a first hard phase, a second hard phase and a binder phase, the first hard phase is formed by WC particles, the second hard phase is formed by a compound of one or more metals selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W and one or more elements selected from the group consisting of nitrogen, carbon, boron, and oxygen, or a solid solution of the compound (except for WC), the binder phase is formed by an iron group metal, and the second hard phase is higher than or identical to the first hard phase in terms of volume ratio.

There is provided a tool for friction stir welding having excellent wear resistance and chipping resistance. The tool for friction stir welding according to the present invention is a tool for friction stir welding used in friction stir welding processing, wherein the tool for friction stir welding includes a base material, the base material includes a first hard phase and a binder phase, and has a thermal conductivity of 45 W / m·K or less, the first hard phase is formed by WC particles, and the binder phase is formed by an iron group metal and is included in the base material at a volume ratio of 8% by volume or more and 28% by volume or less.

There is provided a tool for friction stir welding having excellent wear resistance and chipping resistance. The tool for friction stir welding according to the present invention is a tool for friction stir welding used in friction stir welding processing, wherein the tool for friction stir welding includes a base material, the base material includes a first hard phase and a binder phase, and has a thermal conductivity of 45 W / m·K or less, the first hard phase is formed by WC particles, and the binder phase is formed by an iron group metal and is included in the base material at a volume ratio of 8% by volume or more and 28% by volume or less.

To provide a method of forming a multi-layer paint film with which, even when applying three paint layers and baking the paint layer only once, it is possible to achieve a paint film appearance the same as that with the conventional baking twice method. [Means of Resolution] A method of forming a multi-layer paint film in which an aqueous first base-paint is painted on a base material on which an electro-deposition paint has been coated and a first base-paint layer is formed, an aqueous second base-paint is painted on said first base-paint layer as a wet-on-wet system and a second base-paint layer is formed and, moreover, a clear-paint is painted on the second base-paint layer as a wet-on-wet system and a clear-paint layer is formed and then the three paint layers are all baked at the same time which is characterized in that the aqueous first base-paint includes as essential components hydroxyl group containing non-ionic resin where ethylene oxide units and / or propylene oxide units are included in an amount of from 4 to 15 mass % in the resin and of which the resin acid value is less than 15 mgKOH / g and the hydroxyl group value is from 10 to 100 mgKOH / g, and crosslinking agent.