Stirring of quenching oil:

Stirring of quenching oil:

　　Good agitation can prevent local oil temperature from being too high and make the oil temperature in each part of the tank more uniform.　　Agitating can increase the relative flow rate between the workpiece and the quenching oil of the quenching furnace, thereby increasing the cooling capacity of the oil.

　　 The setting of the stirring device and the mounting method of the workpieces, etc., should try to make the workpieces in different parts of the same batch of quenching obtain basically the same oil temperature. Part of the workpiece or the local relative flow rate of the workpiece is too high or too low, which will adversely affect the uniformity of quenching and cooling. Of course, compared with the water-based quenching medium, the degree of this effect is much smaller.

Regarding oil pollution and preventive measures:

The pollution sources of quenching oil include: external pollution, such as the oxide scale brought by the workpiece, the water leaked from the cooler, and other substances from the outside; self-pollution, which cannot be automatically discharged during use and remains in the oil Oxidation deterioration products; plus the remaining products after the reaction of foreign pollutants with quenching oil and its pollutants. The accumulation of internal and external pollutants will gradually change the color, transparency, viscosity, flash point, residual carbon and acid value of the oil. This change process is the deterioration process of the quenching oil. Among the effects of deterioration, the changes in the oil cooling characteristics and the deterioration of the brightness of the workpiece after quenching are largely related to the heat treatment effect of the workpiece. Changes in cooling characteristics often change the quenching hardness, quenching depth and deformation of the same workpiece.

Remove the heavy high-aluminum refractory bricks and angle steel from the original top of the all-fiber trolley furnace, and use the A3 steel plate with δ=5mm to make a "V"-shaped channel steel body welded to form an arc roof, and add six longitudinal reinforcement beams on the top (using L70mmL70mm7mm Angle steel), and the furnace panel, top plate, and the furnace body are spot welded and reinforced to increase the strength, and effectively prevent the top of the furnace lining from falling down after installation.

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