Process for processing titanium-coated screw tap

Abstract

The invention discloses a process for processing a titanium-coated screw tap. The process comprises the following steps of: performing refined pretreatment such as sandblasting, cleaning and the like on a cutter; degreasing, dedusting and decontaminating the cutter, and performing moderate cutting edge passivation and the like on the cutter to obtain a clean neutral metal surface; clamping and feeding into a furnace cavity; performing argon ion bombardment under a high vacuum state to obtain an active metal surface; and depositing a coating layer with required performance and thickness on the metal surface. The process is characterized in that: the coating layer with the required performance and the thickness of between 1 and 5um is deposited on the metal surface at the temperature of between 250 and 500 DEG C for 6 to 10 hours; a current inlet wire for a coating furnace has the voltage of 380V and the load current of between 100 and 300A; and a coating comprises the following component elements in percentage by weight: 5.2 to 6.2 percent of titanium (Ti), 5.5 to 5.0 percent of aluminum (Al), 48.3 to 50.3 percent of nitrogen (N) and 41 to 38.5 percent of chromium (Cr).

Description

technical field [0001] The invention relates to a processing technology of a titanium-coated tap, specifically a tool and a cutting tool used on a mechanical finishing machine tool, that is, a tap. A new process is adopted to coat the surface of the tap with a metal film layer containing titanium. The service life of the tap can be greatly extended, and the processing performance is greatly enhanced. Background technique [0002] Ordinary machine taps have long been made of general-purpose high-speed steel, and can only be used to process ordinary steel workpieces at conventional cutting speeds and efficiencies. They are suitable for processing high-strength alloy steels in the automotive industry, especially stainless steel, and aviation and aerospace industries. The titanium alloys, heat-resistant alloys and other workpieces used are not only inefficient, but even unprocessable. For this reason, in response to this situation in China, efforts have been made to develop hig...

AI Technical Summary

Problems solved by technology

[0003] The present invention overcomes the disadvantages and defects of the prior art, such as monotonous product structure, single style, dull, few functions, not strong, inconvenient to use; materials and design are not particular.