14 results about "Case hardening" patented technology

This invention discloses a hardening device and method for rolling bearing steel balls, relating to the field of surface hardening treatment technology. The hardening device includes a bath, an elastic base disposed below the bath, a working medium and steel balls inside the bath, the working medium comprising alloy element powder, abrasive powder, and a conductive solution, a pulsed plasma gun positioned above the bath, the outlet end of the pulsed plasma gun inserted into the bath with its axis intersecting the vertical axis of the bath at an acute angle, and an electromagnet for attracting steel balls mounted on the surface of the bath. A matching hardening method is also provided. The technical solution of this invention forms a high-hardness alloy layer on the surface of the steel ball, improving the hardening quality of the steel ball surface and enabling the steel ball to meet the performance requirements for use under high load and corrosive environments.

This invention discloses a surface hardening method for universal joints in screw drills and related universal joints. The method includes: performing heat treatment and finishing on a rough-machined universal joint blank to obtain the universal joint body; after preheating the universal joint body, spot welding a tungsten-cobalt alloy block wrapped with nickel-based brazing filler metal to the wear-resistant contact surface at one end of the universal joint body; spraying nickel-tungsten carbide powder and nickel-coated boron carbide composite powder onto the wear-resistant contact surface to form a hardened layer on the wear-resistant contact surface; after cooling, grinding the sprayed surface to the design dimensions; inspecting the porosity of the ground sprayed surface, filling the porosity with nickel-tungsten carbide powder and nickel-coated boron carbide composite powder, heating and melting to seal the porosity; and after cooling, precision grinding the universal joint to the design dimensions. This invention greatly improves the wear resistance and impact fracture resistance of the universal joint, enabling it to be used in conjunction with other screw drill components resistant to 350℃ high temperatures to form screw drills resistant to 350℃ high temperatures.

The application discloses a preparation method of a ball pin and the ball pin and belongs to the technical field of vehicles. After a ball head to be processed is obtained, surface hardening treatment is performed on the ball head, so that a surface hardening layer is formed on the surface of the ball head. The hardness of the surface hardening layer is greater than the hardness of the inside of the ball head and greater than the hardness of a rod body. The surface hardening layer covers the ball head. After the ball head is installed in a ball seat, the surface hardening layer isolates the ball head from the ball seat, and the surface hardening layer is in contact with the inner wall of the ball seat. During rotation of the ball head in the ball seat relative to the ball seat, the surface hardening layer and the inner wall of the ball seat are in mutual friction. The hardness of the surface hardening layer is relatively large, so that the wear resistance of the surface hardening layer is relatively good, and the surface hardening layer is not easily damaged, so that rotation of the ball head in the ball seat relative to the ball seat is more smooth. The ball head and the rod body are separately manufactured, so that the surface hardening treatment process of the ball head does not affect the rod body, the strength of the rod body is not reduced, and the rod body is not easily broken.

The utility model discloses a high chromium steel ball surface hardening treatment device relates to high chromium steel ball surface processing relevant field, for solving the problem of the steel pipe rotation along the steel pipe when the heating of prior art, and the stable movement position of rotating axle, and the uneven heating of the front and rear end point and the middle of the outer surface, lead to the problem of the inconsistent hardness of steel ball surface. A plurality of induction quenching units are arranged on the upper end of the supporting bottom plate from front to back, the induction quenching unit includes eddy current heating cylinder and cooling quenching cylinder, the upper end of the eddy current heating cylinder is fixed with the ball inlet pipe on the side away from the cooling quenching cylinder, the inside of the eddy current heating cylinder forms the feed zone along the lower end of the ball inlet pipe, the other side of the inside of the eddy current heating cylinder forms the heating zone, the inside of the cooling quenching cylinder forms the cooling zone, the heating zone and the cooling zone are fixed with the spiral piece together, and the spiral piece spirally downward along the inclined direction of the eddy current heating cylinder and the cooling quenching cylinder.

The utility model discloses a spray forming steel surface hardening post -treatment device, it includes work table, clamping assembly and cleaning component, the top fixed connection of work table has the guide, the output fixed connection of electric telescopic handle has clamping block, the cleaning component includes rotary disc, sliding support frame and motor, the sliding support frame slides on the guide, the inner wall fixed connection of rotary disc has damping rod, one side fixed connection of damping rod has brush, through above -mentioned structure, through the clamping assembly steady fixation work piece of four corners distribution, the compound motion of rotary disc rotation and sliding support frame horizontal movement in combination cleaning component, drive its inside circumference uniform distribution, have the brush close work piece surface of elasticity, and ensure brush rotation axis and work piece center axis alignment, have promoted the evenness and adaptability of cleaning action to work piece surface, effectively avoided the cleaning dead angle or uneven force.

This invention discloses a universal joint and its surface hardening process, belonging to the technical field of oil and gas exploration, development, and drilling equipment. The surface hardening process of the universal joint of this invention includes the following steps: toughening and tempering treatment of the universal joint substrate; and ion nitriding and catalytic permeation treatment of the universal joint after the tempering treatment. The universal joint prepared by this invention effectively solves the surface hardening defects of screw drill bits currently on the market, greatly improving the stable service life of screw drill bit universal joints, meeting the usage requirements of high-corrosion, high-temperature, high-pressure, and complex well conditions in deep and ultra-deep oil and gas drilling, significantly improving the overall service life of screw drill bits, increasing drilling efficiency, and enhancing drilling production safety.

This invention discloses a hardened slip component and its preparation method. Specifically, it discloses a method for surface hardening of slip components used in downhole tools. The slip component may have a bearing surface and be constructed of a metallic matrix material. The method may include the following steps: positioning at least the bearing surface of the slip component in direct contact with a boron source; bonding an outer layer to at least the bearing surface by boronizing the matrix material to form a metallurgical bond between boron from the boron source and the matrix material; and maintaining the overall temperature of the slip component below the melting point of the matrix material.

Surface preparation for sliding surfaces can enhance wear performance for surgical instruments such as surgical staplers which include reusable mechanisms that are used multiple times with single use reload cartridges. To reduce the potential for galling wear in a metal-to-metal sliding engagement, a combination of surface hardening, surface finish, and surface coatings can be applied to metallic components of a surgical instrument. Surface hardening techniques can allow further manufacturing operations such as welding without compromising the strength of the underlying metal substrate. With stainless steel metal substrates, as surface or case hardening techniques can reduce corrosion resistance, a surface coating can be applied to inhibit surface oxidation as well as provide a barrier to metal-to-metal contact. A further lubricious coating layer such as a bone wax coating layer can enhance galling resistance.

Inductor (1) for surface hardening of a surface area of ​​a metallic workpiece comprising a conductor loop (2) made of an electrically conductive material (3) which defines an induction surface (4) of the inductor (1) adapted to the surface area to be hardened, and at least one spacer element (5) which projects from the inductor (1) beyond the induction surface (4), characterized in that a recess (6) is provided in the material (3) of the conductor loop (2) in the area of ​​the induction surface (4), into which the spacer element (5) is inserted and the recess (6) is a threaded bore (7) into which the spacer element (5) is screwed, wherein the at least one spacer element (5) has a rotatably mounted rolling element (9, 10) at its projecting end.

A method of treating a mining blade, wherein the mining blade is subjected to a surface hardening and toughening process; wherein the surface hardening and toughening process is a shaking process within a closed vessel; characterized in that the shaking process is performed with a peak-to-peak displacement of > 20 mm, and wherein the maximum shaking frequency during the shaking process is between 5 - 30 Hz.

This process reliably improves the wear resistance, seizure resistance, fatigue strength, and heat check resistance of the workpiece W without requiring prolonged gas nitriding, blasting, or pickling. [Solution] The present invention is a surface hardening treatment method for a workpiece W made of alloy tool steel or high-speed tool steel. In the surface hardening treatment method of the present invention, the workpiece W is subjected to a preliminary treatment in which it is heated and held in an atmosphere of heat treatment gas, and then the workpiece W is subjected to a gas nitriding treatment.

The utility model relates to die technical field, and disclose front crossbeam front wall board department component side cut punch die, including upper die holder and lower die holder, still include: side cut block and punch female die, the side cut block is fixed and installed through bolt the bottom of upper die holder, punch female die is fixedly connected through bolt the top of lower die holder, the utility model discloses that the upper die is composed of upper die holder and side cut block, and is assembled fastening through high -precision hexagon socket head cap screw, ensures the side cut accuracy, lower die is equipped with lower die holder and punch female die, also adopt hexagon socket head cap screw connection, guarantee punch stability. The die middle is equipped with guide assembly, and cooperates lathe movable mechanism, realizes accurate side cut and punch synchronous operation, and the die main part selects high hardness alloy steel material, and the wear resistance is promoted three times after surface hardening treatment, can guarantee the size consistency when automobile component continuous production, significantly improves production efficiency and product quality.

A method of treating a cemented carbide insert for rock drilling and mineral cutting comprising a core of cemented carbide and a surface zone of cemented carbide wherein the core further contains eta-phase and the surface zone is free of eta-phase, and wherein the mining insert is subjected to a surface hardening process wherein the surface hardening process is executed at an elevated temperature of or above 50° C.