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Dry flattening method for pure titanium strip coils by aid of common cold rolling mill

A cold rolling mill, common technology, applied in the direction of metal rolling, metal rolling, manufacturing tools, etc., can solve the problem of large investment in equipment

Inactive Publication Date: 2012-05-02
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, the plate shape correction of pure titanium coils needs to be realized by a special tension leveler or tempering machine, and the equipment investment is relatively large. Therefore, it is necessary to study how to use ordinary cold rolling mills to achieve the leveling of pure titanium coils

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Send the annealed GR2 pure titanium strip coil with a specification of 1.22*1250*mm into the ordinary cold rolling mill, the rolling speed is 45m / min, and the uncoiling unit tension is 2.0 kg / mm 2 , winding unit tension 5.0 kg / mm 2 , under the condition that the rolling force is 320 tons, through the constant rolling force control mode, the flat roll is used for dry leveling. After leveling, the surface roughness of the coil is ≤2mm / m, and the surface roughness is 0.28~0.38um. The yield strength is 300-330 MPa, the tensile strength is 410-430 MPa, and the elongation after breaking is A 50 31-35%.

Embodiment 2

[0013] The GR2 pure titanium coil with a specification of 1.02*1250mm after complete recrystallization annealing treatment is sent to an ordinary cold rolling mill. The rolling speed is 35m / min, the uncoiling unit tension is 2.5 kg / mm2, and the winding unit tension is 6.0 kg / mm2. mm2, under the condition of rolling force of 240 tons, through constant rolling force control mode, flat rolls are used for dry leveling. um, the yield strength is 300-330 MPa, the tensile strength is 415-435 MPa, and the elongation after fracture is A 50 32-35%.

Embodiment 3

[0015] The TA1 pure titanium coil with a specification of 0.6*1250mm after complete recrystallization annealing is sent to the ordinary cold rolling mill, the rolling speed is 25m / min, and the uncoiling unit tension is 3.0 kg / mm 2 , winding unit tension 7.0kg / mm 2 , under the condition that the rolling force is 110 tons, through the constant rolling force control mode, the crown roll with a crown of 0.01mm is used for dry skinning. The roughness is 0.15-0.25um, the yield strength is 220-245MPa, the tensile strength is 305-325MPa, and the elongation after fracture is A 20 65-72%.

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Abstract

The invention discloses a dry flattening method for pure titanium strip coils by the aid of a common cold rolling mill. A pure titanium strip coil is fed into the common cold rolling mill after annealing treatment, and under conditions of the rolling speed of 15m / min to 50m / min, unit uncoiling tension of 1kg / mm2 to 10kg / mm2, unit rolling tension of 1.5kg / mm2 to 15kg / mm2 and rolling force of 100 tons to 400 tons, a working roll on the common cold rolling mill directly realizes dry flattening of the pure titanium strip coil in a constant rolling force control mode. By the dry flattening method, influence of stress is eliminated after the cold-annealed pure titanium strip coil is flattened by the common cold rolling mill in a dry manner, a board is flattened, unevenness of the board of the pure titanium strip coil after being flattened in the dry manner is smaller than or equal to 3mm / m, and relevant Chinese and American standard requirements and customer service requirements on various mechanical property indexes and surface quality can be met.

Description

technical field [0001] The invention relates to a material processing technology, in particular to a method for dry-leveling a pure titanium coil by using an ordinary cold rolling mill. Background technique [0002] Cold-rolled pure titanium coils have the characteristics of low elastic modulus, high yield strength ratio, large deformation rebound, and high deformation strengthening rate. Obtain good plate shape quality, mechanical properties and surface quality (from the patent, publication number CN 101486051A). However, at present, the shape correction of pure titanium coils needs to be realized by a special tension leveler or tempering machine, and the equipment investment is relatively large. Therefore, it is necessary to study how to use ordinary cold rolling mills to achieve the leveling of pure titanium coils. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for dry-leveling pure titanium coils b...

Claims

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Application Information

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IPC IPC(8): B21B15/00B21D1/02
Inventor 顾新盛包淑娟刘茵琪王非石洪轻王卫超
Owner LUOYANG SUNRUI TI PRECISION CASTING
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