6 results about "Cemented carbide" patented technology

The invention relates to a titanium-carbide-based steel-bonded cemented carbide material which is characterized in that titanium carbide (TiC) is adopted as a hard base of the material, and alloy tool steel is adopted as a binding phase. The volume percentage of the titanium carbide is 35-45%, and the mass percentage of the alloy tool steel is 55-65%. A total mass of the titanium carbide and the alloy tool steel is 100%. The alloy tool steel is composed of chromium, molybdenum, aluminum, nickel, titanium, and iron. According to the invention, the alloy material is prepared with an advanced low-pressure hot-isostatic-pressing sintering technology. The production process is simplified, production efficiency is improved, and energy consumption is greatly saved.

The invention provides a double-sided bonding method applicable to hard alloy bars in the hard alloy hard-surface machining process and an application thereof. According to the method, a locating groove plate for bonding is scientifically designed; the hard alloy bars are arranged on the locating groove plate and bonded through perforated double-sided tape; the hard alloy bars or blocks are fixed through spot welding; the tape is placed on the steel surface of a component to be machined, and the steel surface is subjected to spray welding, surfacing and grinding and machined into the hard surface. The method is simple and easy to realize, the hard alloy bars are bonded at a time, the bonding efficiency is greatly improved, and the defects that bonding angles are different and bonding intervals are uneven due to manual operation are overcome, the bonding accuracy is improved, and high-efficiency combination of the bonding plate to which the hard alloy bars adhere and the surface to be machined is effectively achieved through the double-sided tape, and operation is simplified. Through the method, the abrasion resistance of the hard surface of the product is effectively guaranteed and improved; the method can be well applied to hard surface machining of centering devices or TC bearings for mining drilling tools and screw drilling tools.

The invention discloses a preparation method for tungsten-nickel alloy with an abrasion-resistant and corrosion-resistant coating. According to the tungsten-nickel alloy prepared through the method, the problem of 'nickel pools' and holes frequently occurring in a traditional preparation process of fine-grain cemented carbide is solved, and the comprehensive performance of the alloy is improved. A multi-gradient coating structure is adopted, the components of the coating transit from Cr and CrN to CrAlSiN gradually, the coating grain size and residual stress in crystal lattices are reduced, the deposition thickness of a film is improved, and therefore the bearing capacity and abrasion resistance of the coating are greatly improved.

The invention discloses a diamond composite sheet and a preparation method thereof. The method comprises the following steps: plating a layer of metal cobalt on the surface of diamond micro-powder inadvance to obtain the diamond micro-powder with the metal cobalt plated on the surface; filling a metal cup or a carbon mould with the diamond micro-powder with the metal cobalt plated on the surfaceand a hard alloy substrate, and performing vacuum treatment on an assembled component; and filling a sintering mould with the component which is subjected to the vacuum treatment, and sintering to thediamond composite sheet. According to the diamond composite sheet and the preparation method thereof, the problems that the strength, the impact resistance, the toughness and the wear resistance of the diamond composite sheet of the diamond composite sheet are not high because the metal cobalt is distributed unevenly in the existing diamond composite sheet are solved.

Disclosed is a diamond composite tooth, which comprises a cemented carbide body (1) and a diamond composite layer (2), wherein the diamond composite layer (2) is sintered so as to attach to an upper side face (11) and top face (12) of the cemented carbide body (1); the thickness of the diamond composite layer (2) at the top face (12) of the cemented carbide body (1) is more than the thickness of the diamond composite layer (2) at the upper side face (11). The present invention has the advantages of a simple and compact structure, low cost, and the ability to solve the problem of regions where stress is concentrated, thus effectively extending the service life thereof.

The invention adopts (TaC + NbC) combined trace elements to improve the red hardness of a product, so a cutter has the advantages of high red hardness, good wear resistance, and no point folding or tipping of a cutter point under a high temperature cutting condition. The matching of a WC material belongs to a thick-thin-matched mixed crystal structure, so the high lightness and the high hardness are realized, and a problem that the high strength and the high hardness of cemented carbide cannot coexist is solved.