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Aqueous solution lubricant for aluminum cold rolling

A technology of lubricants and solutions, used in lubricating compositions, workpiece lubricating devices, additives, etc.

Inactive Publication Date: 2013-07-03
QUAKER CHEM CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure oil products provide good board surface quality, but also have serious drawbacks: 1) flammability; and 2) higher consumption rates
Potential disadvantages of emulsions include: 1) limited strip cleanliness after annealing due to too high evaporation temperature; and 2) dirty oils are easily emulsified, which reduces rolling performance
However, according to the patent, these water-based products need to reach a temperature of 360°C before they evaporate

Method used

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  • Aqueous solution lubricant for aluminum cold rolling
  • Aqueous solution lubricant for aluminum cold rolling
  • Aqueous solution lubricant for aluminum cold rolling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: Boundary lubrication

[0050] Intrinsic lubricity of the lubricant package was evaluated in a boundary testing machine. The prescribed test procedure commonly used to evaluate the lubricating properties of lubricants used in aluminum cold rolling was used.

[0051]

[0052] The reference (commonly used in industrial rolling mills) has a coefficient of friction of about 0.08-0.13 in different types of aluminum strip. As shown in the table above, Formulation 1 demonstrated a CoF successfully within this standard range, while Formulation 2 had a lower CoF.

Embodiment 2

[0053] Embodiment 2: antifouling performance

[0054] Stain resistance is a key parameter for strip cleanliness after rolling and annealing. The anti-fouling properties of lubricant fluids are evaluated by the stack stain test. This is a key parameter which evaluates the strip cleanliness after rolling and annealing. To test the lubricant fluid, the fluid was applied between the surfaces of two aluminum panels and wrapped tightly with tape. The wound sheet was then placed in an oven at approximately 90°C while being pressurized with a load of approximately 4.5 kg. After 24 hours, the wrapped panels were removed and the surface was observed. Energy dispersive spectroscopy (EDS) was used to measure the amount of different elements on the stained surface. Oxygen is used as the subject matter for evaluating the degree of water pollution.

[0055]

[0056] O content% Al content% reference 14.30 85.70 Recipe 1 10.05 89.95 Recipe 2 16.52...

Embodiment 3

[0058] Example 3: TGA

[0059] For rolling mills without cleaning lines, the evaporation properties of aqueous lubricants are important. To be able to roll all aluminum alloys, all material on the aluminum surface must be removed below 240°C. Therefore, according to the TGA curve, the product should evaporate before reaching this temperature. The thermal stability and evaporation performance of the aqueous lubricant packages were evaluated by thermogravimetric analysis ("TGA") to show the cleanliness of the tape surface after annealing.

[0060] The above test results were obtained in air conditions. Such tests can also be performed in an oxygen environment.

[0061] From the results shown in Figure 1 it can be seen that the single-phase water-based lubricant fluids of Formulations 1-2 evaporate at a higher temperature than the reference. However, they evaporate completely below 240°C. Based on this property, a clean plate surface is also expected to be obtained aft...

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Abstract

Compositions related to a water-based lubricant fluid for aluminum cold rolling which is free from measurable particles or oil droplets which can be applied in field production. A single-phase lubricant fluid may include water-soluble polymers, lubricating additives, anti-rust additives, anti-oxidant additives, pH-adjust additives, or combinations thereof.

Description

Background of the invention [0001] Aluminum cold rolling is one of the most important processes for aluminum applications. Lubricants are critical for continuous production and good quality. Traditionally, there are mainly two types of lubrication methods used in the cold rolling process: 1) lubrication with pure oil, and 2) lubrication with oil-in-water emulsion. The first generation lubricants were pure oils. Pure oil products provide good board surface quality, but also have serious drawbacks: 1) flammability; and 2) higher consumption rates. The second generation products are oil-in-water emulsion products. Compared to pure oils, lotions avoid the problems that come with using pure oil products. Potential disadvantages of emulsions include: 1) limited strip cleanliness after annealing due to too high evaporation temperature; and 2) dirty oils are easily emulsified, which reduces rolling performance. [0002] The aqueous lubricants for aluminum cold rolling of some emb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M173/02C10M169/04B21B45/02C10N40/24
CPCB21B2003/001C10M145/26C10M173/02C10M2209/104C10M2209/105C10M2215/04C10M2215/223C10M2223/04B21B45/0242C10N2030/12C10N2040/243C10N2040/245C10M129/18
Inventor Y.张Y.沈金伟佳X.王
Owner QUAKER CHEM CHINA