Quantitative lubrication method for magnesium alloy sheet rolling process
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A rolling process, magnesium alloy technology, applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of affecting biting, cracks on the plate surface, affecting normal rolling, etc., and achieve the effect of reducing burning loss
Inactive Publication Date: 2015-10-28
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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[0011] During the rolling of magnesium alloy plates, lubrication can prevent sticking and reduce friction, improve surface quality, and at the same time cause cooling and cooling. If the lubricant is not applied properly, it will not only affect the bite, but also cause cracks on the plate surface due to the rapid temperature drop. Affect normal rolling
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Embodiment 1
[0095] It is known that the size of the AZ31 magnesium alloy rough-rolled slab is 2000×600×10(㎜), the rolling temperature is 400°C, the reduction specification is 10-8.0-7.8-6.63-6.0, the rolling mill speed Vr=1.0m / s, the plate The entrance speed is approximately calculated by Vo=Vr / λ, and the selection and calculation of other parameters refer to the aforementioned method; the temperature of the roll during rolling is 200-250°C. Lubricating oil with No. 10 engine oil plus additives, specific gravity 0.9g / ㎝ 3 , the coefficient n is selected as 1, and the calculation results of quantitative fuel supply are shown in Table 1.
[0096] Quantitative supply regulation of lubricating oil for magnesium alloy rough rolling Table 1
[0097]
[0098] Among them, R 12 Refers to R 1 = R 2 = R 12 , calculated by taking the roughness of the roll.
[0099] (Note: Since full oil lubrication will cause combustion at high temperature, emulsion lubrication can be used above 450°C.)
Embodiment 2
[0101] It is known that the size of the AZ31 magnesium alloy finish rolling slab is 3000×600×6.0, the rolling temperature is 350°C, the maximum pass processing rate does not exceed 10%, the reduction specification is 6.0-5.4-4.9-4.5-4.2-4.0, the roll speed Vr=1.0m / s, the plate entrance velocity is approximately calculated by Vo=Vr / λ, and the selection and calculation of other parameters refer to the above method; the temperature of the roll during rolling is 200-250°C. Lubricant with No. 10 engine oil plus additives, specific gravity 0.9g / ㎝ 3 , the coefficient n is selected as 1, and the calculation results of quantitative fuel supply are shown in Table 2.
[0102] Quantitative supply regulations for magnesium alloy medium rolling lubricating oil Table 2
[0103]
[0104]
[0105] Among them, R 12 Refers to R 1 = R 2 = R 12 , calculated by taking the roughness of the roll.
[0106] (Note: Since full oil lubrication will cause combustion at high temperature, emulsio...
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Abstract
The invention discloses a quantized lubricating method in the rolling process of magnesium alloy sheet materials. According to the features of the magnesium alloy materials, rolling process systems and equipment conditions, the amount of lubricants required for meeting interface lubricating is determined; furthermore, according to sheet material area, rolling speed, and interface temperature, the burning loss amount of the lubricants is determined, and the lubricants are sprayed onto a roll surface in a quantized mode for overall consideration; besides, lubricant particles should be attached to the position, within 45-degree included angle range between the central horizontal plane of a roller on the inlet side, of the roll surface; in order to improve biting-in and reduce burning loss, a timely and segmented oil supply method is adopted, namely, oil is supplied after the head portions of the sheet materials are bit in, and oil supplying is stopped when the tail portions of the sheet materials enter roll bites. Lubricating is carried out according to the quantized lubricating method for rolling the magnesium alloy sheet materials, through macroscopic observation, the roll surface and a sheet surface are light and smooth after being rolled, the adhesion phenomenon of the roll surface does not happen, and therefore the requirement for lubricating is satisfied; through measurement, the sheet surface is close to the roll surface in roughness after being rolled with the lubricants applied, and the roughness of the sheet surface is reduced.
Description
【Technical field】 [0001] The invention belongs to the technical field of metallurgy and material processing engineering, and in particular relates to a method for lubricating contact surfaces in the rolling process of magnesium and magnesium alloy plates. 【Background technique】 [0002] Rolling is one of the main methods of metal plastic processing, and the plate provided to the market by the rolling method is also the main product in the field of metal material processing. As a light metal structural material, magnesium alloy has attracted more and more attention at home and abroad in recent years. Due to its own characteristic requirements, it is usually hot-rolled or warm-rolled between 225°C and 500°C, and hot-rolled with other metal materials. As always, lubrication is required between the roll and sheet contact interface. Its purpose is mainly to: reduce the friction coefficient of the contact interface between the roller and the plate, reduce energy consumption and t...
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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/00B21B27/10
Inventor 刘长瑞朱晓雅杜忠泽王快社王庆娟刘立李奕霏
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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