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Preparation method for aluminium alloy pin shaft component

A technology of aluminum alloy and pin shaft, applied in the direction of metal material coating process, etc., can solve the problems affecting the surface hardness and wear resistance of the workpiece, the carbon content of the surface layer is reduced, and the process flow is complicated, and achieves good fatigue performance and oxidation resistance. The effect of good performance and simple preparation method

Inactive Publication Date: 2018-03-09
徐州市华圆机械厂
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Problems solved by technology

However, the process of surface quenching and surface carburizing is complex, costly, and polluting
Moreover, the existing heat treatment process of aluminum alloy pin shaft parts often causes the surface of the brake round pin workpiece to be oxidized during the heat treatment process, which reduces the carbon content of the surface layer and forms a decarburized layer on the surface, which in turn affects the surface hardness and hardness of the workpiece. wear resistance

Method used

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Embodiment Construction

[0015] The present invention is further described below.

[0016] A method for preparing an aluminum alloy pin shaft member, comprising the steps of:

[0017] 1) Adding 0.01% to 0.02% of Nb and 0.08 to 0.12% of B to the aluminum alloy blank;

[0018] 2) The casting process is used for pouring and molding, and the temperature difference between the pouring temperature of the molten aluminum and the metal mold is kept at 660-700°C during the pouring process;

[0019] 3) At a temperature of 380-420°C, place the aluminum alloy pin shaft in a 50-55% by mass sodium nitrite solution until the surface is black gray or completely black, and then remove the aluminum alloy pin shaft from the nitrous acid out of the sodium solution;

[0020] 4) Perform aging treatment on the aluminum alloy pin shaft parts, the aging temperature is 100°C-180°C, and the aging time is 20 hours-35 hours.

[0021] Preferably, the aging temperature is 120°C to 140°C.

[0022] Preferably, the temperature dif...

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Abstract

The invention discloses a method for preparing an aluminum alloy pin shaft part, which comprises the steps of adding new elements, casting, blackening treatment and aging treatment. The aluminum alloy pin shaft part obtained by the invention has good wear resistance, high hardness, good fatigue performance, long fatigue life, good oxidation resistance, simple preparation method, low cost and environmental protection.

Description

technical field [0001] The invention relates to a preparation method, in particular to a preparation method of an aluminum alloy pin shaft part, and belongs to the technical field of metal processing. Background technique [0002] Pin shaft parts are necessary parts of construction machinery, which are subjected to shear and bending loads during work, and often fail in the form of wear and fatigue. At present, in the field of construction machinery, alloy steel materials such as 40Cr, 42CrMo, and 35CMo are used as raw materials, and pin shafts are prepared by quenching and tempering→turning→grinding→surface plating. Among them, the quenching and tempering method has long production cycle, high energy consumption, high cost and serious environmental pollution. In addition, in order to further improve the wear resistance and strength of the pin shaft, on the basis of quenched and tempered steel, the existing technology also uses processes such as surface quenching and surface...

Claims

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Application Information

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IPC IPC(8): C23C22/68C23C22/82C22F1/04C22C1/02B22D27/04
CPCC23C22/68B22D27/04C22C1/026C22F1/04C23C22/82
Inventor 王兵
Owner 徐州市华圆机械厂
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