A heat treatment process for automobile main shaft
A spindle and automobile technology, applied in heat treatment furnaces, heat treatment equipment, metal material coating processes, etc., can solve the problems of shortening the service life of the spindle, coarse structure, and more Paralympic, to increase the service life, reduce brittleness, avoid The effect of decarbonization
Active Publication Date: 2020-07-28
温岭市大山热处理厂(普通合伙)
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Problems solved by technology
After the above heat treatment, the structure of the spindle after carburizing and quenching is relatively coarse, and there are many parasites, so the service life of the spindle is greatly reduced, and it needs to be improved.
Method used
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Experimental program
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Effect test
Embodiment Construction
[0038] A heat treatment process for an automobile main shaft, characterized in that it comprises the following steps:
[0039] S1: Heating, after heating the heating furnace continuously to 900-930°C, place the spindle in the heating furnace for 0.5-1h;
[0040] S2: Carburizing, including the following steps:
[0041] S21: Strong infiltration, keep the temperature constant, continue to feed methanol and propane into the heating furnace, and keep warm for 2.5-3.5h;
[0042] S22: Diffusion, keep the temperature constant, continue to feed methanol and propane into the heating furnace, and keep warm for 1-2h;
[0043] S23: carbon fixation, continue to pass sodium sorbate solution into the heating furnace, keep warm for 0.1-0.2h;
[0044] S3: Quenching, after reducing the temperature in the heating furnace to 840-860°C, put the spindle into the heating furnace and keep it warm for 0.4-0.6h;
[0045] When the main shaft is carburized, the sodium sorbate solution is continuously f...
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Abstract
The invention discloses a heat treatment technology for an automobile main shaft and relates to the field of heat treatment. The technology sequentially includes heating, carburization, quenching, cooling cleaning, tempering, quenching, cooling cleaning and two times of continuous tempering, wherein carburization includes 2.5 h to 3.5 h of strong seepage and 1 h to 2 h of diffusion, and cooling cleaning is fast oil cooling. The heat treatment technology has the following beneficial effects that heat treatment is conducted on the main shaft through two times of the quenching process and multiple times of the tempering process, quenching and tempering treatment is conducted on the main shaft equivalently, brittleness of the main shaft is reduced, internal stress of the main shaft is eliminated or reduced, toughness of the main shaft is improved, and the service life of the main shaft obtained after heat treatment is prolonged; and meanwhile, fast oil cooling is used for replacing traditional classified slow oil cooling, the hardening capacity of the main shaft is improved, in addition, the layer depth of the main shaft is more uniform, and the service life of the main shaft obtainedafter heat treatment is further prolonged.
Description
technical field [0001] The invention relates to the field of heat treatment technology, in particular to a heat treatment technology for an automobile main shaft. Background technique [0002] In the field of material processing and equipment processing, heat treatment is a common process for strengthening the surface of materials and equipment to make them have various good characteristics. Wear resistance, fatigue strength and toughness, etc., so as to meet the different requirements of various mechanical parts and tools. [0003] During the heat treatment of the traditional spindle, the spindle is often carburized through a heating furnace at 920°C, then quenched at 840°C, and tempered at 180°C after cleaning. The structure of the above-mentioned heat-treated spindle after carburizing and quenching is relatively coarse, and it has a lot of residues, so the service life of the spindle is greatly reduced, which needs to be improved. Contents of the invention [0004] Th...
Claims
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IPC IPC(8): C23F17/00C23C8/22C21D9/28C21D1/18
CPCC21D1/18C21D9/28C23C8/22C23F17/00
Inventor 叶振羽
Owner 温岭市大山热处理厂(普通合伙)