Ion nitriding tool for marine crankshaft

Abstract

The invention discloses an ion nitriding tool for a marine crankshaft and relates to the field of metal heat treatment. The ion nitriding tool comprises a nitriding rack arranged in a furnace chamber formed by buckling a furnace casing and a furnace bottom supporting disk, wherein the nitriding rack comprises a cathode hanging plate and a cathode pillar; the cathode hanging plate is arranged at the top end of the cathode pillar; the bottom end of the cathode pillar is fixed on the cathode plate; the cathode plate is fixed on a the furnace bottom supporting disk through insulated supporting disk struts; a crankshaft hanging hole of which an inner ring, a middle ring and an outer ring are annularly and uniformly arranged is formed on the cathode hanging plate; the distance between the inner ring and the middle ring of the crankshaft hanging hole is greater than that between the middle ring and the outer ring of the crankshaft hanging hole. According to the ion nitriding tool disclosed by the invention, the problem that all mechanical properties of the crankshaft, such as hardness, wear resistance, fatigue resistance and corrosion resistance after the crankshaft is nitrided cannot reach the requirement of nitriding due to the non-uniformity of nitriding temperature in the nitriding process of the crankshaft is solved.

Description

technical field [0001] The invention relates to a metal heat treatment equipment, in particular to a special equipment for heat treatment used for normalizing marine nodular cast iron crankshaft castings. Background technique [0002] With the rapid development of automobiles, construction machinery, agricultural machinery and shipbuilding industries, the annual demand for engines in my country has reached more than 60 million units, ranking first in the world. As the core component of the engine, the crankshaft plays an important role in the process of energy conversion and power output. plays a key role. In terms of marine use, the crankshaft is directly connected to the propeller shaft by the diesel engine to transmit propulsion. After the crankshaft is nitrided, its hardness, wear resistance, fatigue resistance, corrosion resistance and other properties can be greatly improved, so it is one of the important links in the heat treatment of the crankshaft. Ion nitriding, a...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides an ion nitriding tool for a marine crankshaft, which can solve the problem of hardness and wear resistance of the crankshaft after nitriding due to uneven nitriding temperature during the nitriding process. , anti-fatigue, anti-corrosion and other mechanical properties can not meet the nitriding requirements

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