Water removal agent and application of water removal agent in new method for removing water by quenching oil
A technology of quenching oil and water agent, which is applied in the direction of quenching agent, heat treatment equipment, manufacturing tools, etc., to achieve the effects of effective removal, control of processing costs, and prevention of idle equipment
Active Publication Date: 2014-01-22
NANJING KERUN LUBRICANTS
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[0009] Purpose of the present invention: to solve the problem of one-time quenching oil with a water content of 0.1% to 1% to achieve the accuracy of quenching oil dehydration (≤0.03%)
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[0019] 1. Quenching oil cooling process and cooling curve
[0020] When the workpiece is quenched and cooled in quenching oil, there are three stages: steam film stage, boiling stage and convection stage. The cooling curve of typical quenching oil is as follows figure 1 As shown, there are generally three requirements for the cooling characteristics of quenching oil during heat treatment:
[0021] (1) The quenching oil vapor film stage should be short, that is, the characteristic temperature (TA) should be high: it is beneficial to obtain high and uniform surface hardness of the quenched parts, and it is also beneficial to control the quenching deformation caused by uneven cooling of high-temperature quenching;
[0022] (2) The maximum cooling rate (Vmax) should be sufficient: for different working conditions, the maximum cooling rate is required to be fast (quick quenching oil) or moderate (isothermal graded quenching oil) to meet the requirements of the depth of hardened la...
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The invention provides a water removal agent and an application of the water removal agent in a new method for removing water by quenching oil. The water removal agent comprises polyoxyethylene polyoxypropylene phosphate ester, a calcium alkylbenzene sulfonate clearing agent, a polymethacrylate pour point depressant and paraffin-based base oil; the water removal agent is added in quenching oil with exceeding water content, and heating and circular stirring are performed, so that the water removal agent and the quenching oil are sufficiently and uniformly mixed; a heating device and a circular stirring device are closed, the quenching oil is subjected to still standing; and finally, an oil-submerged pump is used for pumping oil from the surface of the quenching oil, oil at the upper part and oil in the middle are quenching oil products with qualified water content, and an oil product at the lowest part is the water removal agent and water absorbed by the water removal agent, and is scrapped. According to the water removal agent and the application of the water removal agent in the new method for removing water by quenching oil, the problem about water removal accuracy by adopting quenching oil with 0.1%-1% of water content is solved once, so that the treatment efficiency can be greatly improved; and further, a heat-treatment manufacturer is not required to purchase extra machinery equipment, so that the treatment cost is conveniently controlled, and simultaneously, waste caused by idle equipment after one-time treatment is prevented.
Description
technical field [0001] The field of heat treatment quenching oil belongs to the field of heat treatment of metal materials. Background technique [0002] The quenching oil used in heat treatment is particularly sensitive to moisture, and its content should be strictly controlled, and the relevant standards are also clearly stipulated. For example, the industry standard "JB / T6955-2008 Technical Requirements for Quenching Media Commonly Used in Heat Treatment" stipulates that the moisture content of the quenching oil when it leaves the factory is ≤0.03% . Quenching oil with excessive water content should not be used any longer, otherwise quality accidents and potential safety hazards will easily occur: parts are prone to surface soft spots, quenching cracks, and out-of-tolerance deformation, and the production site is prone to large flames and soot, and even the possibility of fire. [0003] In the actual production process of heat treatment, due to various failures, water is...
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Inventor 聂晓霖王涛
Owner NANJING KERUN LUBRICANTS