Ways to avoid quenching cracks

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Ways to avoid quenching cracks

Source: China Bearing Network Time: 2013-04-05
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Once quenching cracks occur; in most cases, the formation of parts will be abolished; because of the avoidance of quenching cracks have an important meaning. Avoid quenching cracks can be grabbed from the following aspects.
1. The correct depiction of the product should be based on the working conditions of the product (the type of force and the size of the big dew 鹊 鹊 叩 芪У 芪У 龋 龋 龋 龋 龋 龋 龋 慵 慵 慵 慵 慵 慵 慵 慵 慵 慵 慵 慵 慵 慵 慵 慵 慵Shepherd 缓 淼 淼 淼 淼 淼 淼 岢鋈 岢鋈 岢鋈 岢鋈 岢鋈 岢鋈 岢鋈 岢鋈 岢鋈 砸 砸 砸 砸 砸 砸 砸 砸
2. Reasonable arrangement of process lines When the data, layout and skill conditions of the parts are determined; the process personnel should carry out process analysis; determine the reasonable process lines. Properly arrange the orientations of the preparation heat treatment, ice face processing and thermal processing. This is a useful way to improve product quality, improve efficiency, and avoid the tendency of heat treatment to crack.
3, properly determine the heating parameters in the heat treatment production; improper heating is the main factor leading to quenching cracking. Therefore; heating parameters such as heating medium, heating rate, heating temperature and holding time; should be correctly selected and depicted.
4. Selecting a reasonable quenching method depends on the layout and characteristics of the parts and skill requirements; the correct and reasonable selection of quenching methods such as the layout and the nature of the workers can greatly reduce or eliminate the quenching.
5. Selection of quenching medium The selection of quenching medium should be summarized into the following elements:
Part characteristics: the chemical composition of the steel (phase change characteristics); the cross-sectional dimension of the workpiece; several shapes; the appearance roughness and appearance; the placement and density of the parts during quenching.
Quenching method: including quenching bath, mixing speed, flow direction, concentration of solution.
6. Other methods to avoid quenching cracks Temporarily temper after quenching; partial dressing of thin-walled parts with disordered shapes can also be used to avoid cracks.
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