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Lubricant used for swing and rolling forming and use method thereof

A technology of oscillating rolling and lubricants, which is applied in the direction of lubricating compositions, petroleum industry, base materials, etc., can solve the problems of poor adhesion of phosphate conversion film, inability to effectively reduce friction, low thickness and compactness, etc., to avoid Wrinkled workpiece, excellent lubricating effect, good thermal stability

Active Publication Date: 2010-06-23
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor phosphating treatment effect of tantalum and tantalum alloys, the phosphate conversion film formed on the surface of the blank has poor adhesion, low thickness and low compactness, resulting in poor adhesion, low thickness and low compactness of the saponified film formed by the reaction. , thereby significantly reducing the lubricating effect
For tantalum and tantalum alloys, this treatment method has a good lubricating effect when the deformation is small and the deformation temperature is lower than 200°C. However, for the swing rolling forming with large deformation and deformation temperature above 300°C The lubricating effect is poor, and the friction cannot be effectively reduced, resulting in the deterioration of the surface quality of the product, serious wear and tear of the rotary rolling die, and greatly shortened life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A TaW2.5 alloy bar with a diameter of 60mm is selected, and it is intended to be processed into a part with an average thickness of 5mm through one cold swing rolling, and the average deformation is more than 85%. The specific lubrication treatment of the billet is as follows:

[0028] 1. Billet pretreatment: After the TaW2.5 alloy billet is recrystallized and annealed, the billet is cut into a billet of φ60mm×35mm by wire cutting, and then the scaling and oil stain on the billet surface are removed by degreasing, cleaning and drying, and the billet is ready for use .

[0029] 2. Lubrication treatment: Preheat the lubricant with a ratio (weight percentage) of 65% molybdenum disulfide, 10% graphite, 5% paraffin, and 20% water to 70°C for heat preservation, and simultaneously heat the pretreated TaW2.5 alloy Heat the billet in a heating furnace to 200°C for 20 minutes, then quickly spray the preheated lubricant evenly on the surface of the billet, then continue drying th...

Embodiment 2

[0032] A pure tantalum (purity greater than 99.95%) rod with a diameter of 35mm is selected, and it is intended to be processed into a part with an average thickness of 3mm and an average deformation of 88% through one cold swing rolling. The specific lubrication treatment of the billet is as follows:

[0033] 1. Billet pretreatment: After the pure tantalum billet is recrystallized and annealed, the billet is cut into a billet of φ35mm×25mm by wire cutting, and then the scale and oil stain on the billet surface are removed through degreasing, degreasing, cleaning and drying. use.

[0034] 2. Lubrication treatment: Preheat the lubricant with a ratio (weight percentage) of 70% graphite, 5% boron nitride, 5% paraffin, 2.5% sodium sulfate, and 17.5% water to 80°C and keep it warm. The pure tantalum billet is heated in a heating furnace to 250°C for 10 minutes, and then the preheated lubricant is quickly sprayed evenly on the surface of the billet, and then the billet is continued...

Embodiment 3

[0037] A TaW7.5 alloy rod with a diameter of 65mm is selected, and it is intended to be processed into parts with an average thickness of 5mm and an average deformation of 80% through one cold swing rolling. The specific lubrication treatment of the billet is as follows:

[0038] 1. Billet pretreatment: After the TaW7.5 alloy billet is recrystallized and annealed, the billet is cut into a billet of φ65mm×25mm by wire cutting, and then the scaling and oil stain on the billet surface are removed by degreasing, cleaning and drying, and the billet is ready for use .

[0039] 2. Lubrication treatment: Preheat the lubricant with a ratio (weight percentage) of 80% molybdenum disulfide, 5% boron nitride, 2% borax, 3% silicon dioxide, and 10% water to 90°C and keep it warm. The pretreated TaW7.5 alloy billet was heated in a heating furnace to 300°C for 30 minutes, and then the preheated lubricant was quickly and evenly coated on the billet surface, and then the billet was continued to...

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PUM

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Abstract

The invention relates to a lubricant used for swing and rolling forming of tantalum and tantalum alloy parts and a use method thereof. The lubricant contains the components: (1) any two of molybdenum disulfide, graphite and boron nitride, (2) any one or two of borax, ceresin wax, silica and sodium sulfate and (3) water. The lubricating treatment process comprises the following steps of surface cleaning, preheating, spraying and drying. The lubricant and the use method thereof can meet the demand of carrying out severe deformation swing and rolling forming on tantalum and tantalum alloy blanks, thereby effectively reducing the friction between blanks and moulds; products have high surface quality, and the service lives of the moulds are long.

Description

technical field [0001] The invention relates to a lubricant for oscillating rolling forming of metal parts and its application method, in particular to a lubricant for oscillating rolling forming of tantalum and tantalum alloy parts and its application method. Specifically, the present invention relates to a lubricant that forms a lubricating film on the surface of tantalum and tantalum alloy blanks, and the lubricating film is suitable for large-deformation oscillating rolling forming of tantalum and tantalum alloys. Background technique [0002] Tantalum and tantalum alloys have the advantages of high density, high temperature resistance, high strength, good processing performance, fracture toughness, and corrosion resistance. They are indispensable and important materials in the fields of aviation, aerospace, chemical industry, nuclear industry, and high-temperature technology. However, due to the strong adhesion and high friction coefficient of tantalum and tantalum allo...

Claims

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Application Information

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IPC IPC(8): C10M103/00C10N40/20
Inventor 闫晓东彭海健李德富
Owner GRIMAT ENG INST CO LTD
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