Heat treatment process of rocker
A process, nitriding treatment technology, applied in the direction of metal material coating process, coating, solid diffusion coating, etc., can solve the problems of high brittleness and poor wear resistance of rocker arm, and achieve the effect of reducing requirements
Inactive Publication Date: 2011-03-30
徐鹤铭
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Problems solved by technology
After quenching, the brittleness of this part is extremely high, and fractures often occur here during use. For example, the carburized layer does not meet the requirements, and the wear resistance of the rocker arm is poor, resulting in early failure. Once the above defects appear, only the entire furnace is scrapped.
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[0019] In the present invention, after tempering the workpiece at a high temperature of 600°C, heat it for 30 minutes, put it in the sandblasting machine for 5-10 minutes, make the surface hardness of the workpiece HRC27±3, put it in the preheating furnace to preheat to 300±10°C after cleaning, and keep it warm 8 minutes, and then placed in a nitride salt bath at a temperature of 560±5°C for 120±10 minutes, so that the surface hardness of the workpiece is HV450-500, and the total nitride layer depth is 0.25-0.35, and it can be completed.
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Abstract
The invention discloses a heat treatment process of a rocker, belonging to the workpiece heat treatment processes for general machinery. The heat treatment process for the rocker workpiece can guarantee stable quality and prevent workpiece from brittle fracture, and has reduced requirement on carburization equipment and the product pass rate reaching 100%. The heat treatment process comprises the processes of impact molding, carburization, quenching, high-temperature tempering, preheating and malcomising for the rockers.
Description
technical field [0001] The invention belongs to a rocker arm heat treatment process for general machinery, in particular to a rocker arm heat treatment process for a general gasoline engine with a cylinder diameter within Φ100 mm. Background technique [0002] In view of the common problems in the current heat treatment process, the heat treatment of metal parts with complex shapes, many stress concentration points, and frequent use cannot meet the requirements of use, and problems such as deformation stress often occur. For example, the heat treatment process used by the rocker arm includes stamping the raw material of 08 steel plate, carburizing, quenching, low temperature tempering, and polishing. This heat treatment process has high technical requirements on the carburizing furnace, and it is necessary to use a controllable atmosphere heat treatment carburizing furnace or a carburizing furnace with a microcomputer to control the carbon potential in the furnace; Extremel...
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IPC IPC(8): C23F17/00C23C8/22C21D1/18C23C8/50
Inventor 徐鹤铭
Owner 徐鹤铭
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