CN108165822A - A kind of preparation method of low-intensity, easily molded welded tube TA2 cold rolled titanium bands - Google Patents

A kind of preparation method of low-intensity, easily molded welded tube TA2 cold rolled titanium bands Download PDF

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Publication number
CN108165822A
CN108165822A CN201810138353.6A CN201810138353A CN108165822A CN 108165822 A CN108165822 A CN 108165822A CN 201810138353 A CN201810138353 A CN 201810138353A CN 108165822 A CN108165822 A CN 108165822A
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Prior art keywords
titanium
band
welded tube
cold
cold rolled
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CN108165822B (en
Inventor
李渤渤
陶会发
刘茵琪
王非
陈涛
朱丹阳
申瑞
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Luoyang Sunrui Titanium Precision Casting Co Ltd
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Luoyang Sunrui Titanium Precision Casting Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C14/00Alloys based on titanium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/02Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18High-melting or refractory metals or alloys based thereon
    • C22F1/183High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon

Abstract

A kind of low-intensity, the easily molded welded tube preparation method of TA2 cold rolled titanium bands, include the following steps:Welded tube TA2 cold rolled titaniums band finished product is obtained after raw material preparation, cold rolling, degreasing, continuous annealing, pickling, smooth, degreasing sampling.The present invention passes through [O]WhenIt characterizes raw material and strengthens impurity element whole content, and give optimum range, it is controlled in blending process, in combination with follow-up cold rolling, annealing and flattening process measure, realize that control welded tube is in 260 ~ 350MPa reduced levels with TA2 cold rolled titaniums band transverse yield strength, effectively reduce welded tube forming drag, and then reduce frictional force between titanium band and welded tube forming roller mould, and pass through and improve titanium belt surface hardness and roughness, titanium band is reduced with being molded the adhesiveness of roller mould, so as to greatly improve welded tube forming roll service life, and solve titanium welding pipe surface forming polishing scratch defect quality problems.

Description

A kind of preparation method of low-intensity, easily molded welded tube TA2 cold rolled titanium bands
Technical field
The present invention relates to a kind of titanium processing technology, more particularly, to a kind of low-intensity, easily molded welded tube TA2 cold rolled titaniums The preparation method of band.
Background technology
Titanium has many advantages, such as that specific strength is high, corrosion-resistant.Compared with seamless pure titanium tube, it is thin that welded tube can produce 0.3 ~ 1.0mm Wall tube material, production efficiency and lumber recovery are high, at low cost, and production length is unrestricted, can mass steady production, and heat exchange efficiency Height saves the investment of equipment titanium, extensive in the civilian sector application such as electric power, sea water desalination, chemical industry.TA2 cold rolled titanium bands are to use TA2 slabs are prepared after the processing of the processes such as hot rolled, cold rolling, annealing, finishing, and usually institute is according to GB/T using TA2 slabs 3620.1《The titanium or titanium alloy trade mark and chemical composition》Elemental range carries out dispensing and prepared by melting, that is, strengthens impurity element weight Percentage control range is Fe≤0.30%, C≤0.08%, N≤0.03%, O≤0.25%, and as impurity content improves, Cold rolled titanium band strength improves, the TA2 cold rolled titaniums band transverse yield strength ranging from 260 ~ 450MPa being typically prepared.
TA2 welded tubes be using TA2 cold rolled titanium bands, by multigroup molding roller mould, gradually weld after transverse cold bending deformation and Into.But since titanium band resilience is big, molding drag is big, especially when titanium band transverse yield strength is in 350 ~ 450MPa higher range values When, molding is particularly difficult, and frictional force is big between titanium band and molding roller mould, and pure titanium adhesiveness is strong, often will appear surface polishing scratch Defect causes surface of welded pipe quality bad or even scraps, larger molding drag, frictional force and titanium band adherency mold so that molding Service life is relatively low after each reconditioning of roller mould, and frequent roll change is needed to repair roller, and leads to the reduction of welded tube producing line speed of production, Welded Pipe Quality and production efficiency produce bigger effect, and become titanium welding pipe manufacturing enterprise and face main bottleneck, need to be improved.
104032247 B of patent CN disclose a kind of production method of condenser welded tube precision cold-rolled titanium band, comprising adopting With Cold-rolled Pure titanium coiled material, rolled through semi-finished product, cleaning by degreasing, vacuum annealing process and even up aligning and etc. and be made, obtain Surface roughness is 0.15 ~ 0.30 μm of cold rolled titanium band;102310314 B of patent CN disclose a kind of titanium or titanium alloy band volume and add Work method, including using step as " raw material-heating-rolling-annealing-Shot Blasting-reconditioning-pickling-cold rolling-degreasing-vacuum is moved back Fire-straightening or smooth-trimming-product " method prepares cold rolling titanium strip coil.Above-mentioned two patents are although provide TA2 cold rolled titanium bands It prepares basic technology, but there are still titanium band transverse yield strength is high, surface roughness is small, the big problem of welded tube forming drag, causes The titanium welding pipe surface of production is also easy to produce polishing scratch defect, and forming roller die life is short, and welded pipe product line speed of production is low, because It is undesirable that this is used to prepare TA2 welded pipe industryizatioies batch production using effect.
Invention content
The purpose of the present invention is to solve because titanium band transverse yield strength is high, surface roughness is small, welded tube forming drag Greatly, the titanium welding pipe surface of production is caused to be also easy to produce polishing scratch defect, and forming roller die life is short, welded pipe product line production speed The problem of low is spent, a kind of low-intensity, the preparation method of easily molded welded tube TA2 cold rolled titanium bands are provided, by blank impurity member Cellulose content is controlled, and titanium band preparation process is optimized, and realizes titanium band low yield strength, high surface hardness and coarse Degree control effectively reduces titanium band welded tube forming drag, substantially extends welded tube forming roll die life, solve titanium weldering Pipe surface is molded polishing scratch defect quality problems, and improves welded tube producing line speed of production.Using patented method of the present invention, can obtain The TA2 cold rolled titanium bands of welded tube forming are particularly suitable for, titanium welding pipe is produced using it, have the advantages that production efficiency is high, presentation quality is good.
The deficiency of the present invention to solve above-mentioned technical problem, used technical solution are:
A kind of low-intensity, the easily molded welded tube preparation method of TA2 cold rolled titanium bands, include the following steps:
Step 1: raw material prepare:Take major ingredient titanium sponge and dispensing titanium dioxide and be pressed into electrode, define dispensing Fe, C, N, O impurity contents mass percent is respectively [Fe] %, [C] %, [N] %, [O] %, is defined [O]WhenFor characterizing dispensing impurity Element whole content, then dispensing impurity element components meet the following conditions:
[O]When=[O] %+0.5* [Fe] %+0.7* [C] %+2.5* [N] %=0.10 ~ 0.20%,
Then by the electrode suppressed is smelting successively, forging, hot rolling, cold rolling, annealing operation, acquisition thickness is 0.6 ~ 2.5mm Annealed state TA2 cold rolled titaniums band blank;
Step 2, cold rolling:The titanium band blank being prepared in step 1 is taken, TA2 titaniums band blank is carried out using cold mill complex cold It rolls, control cold rolling reduction is 40 ~ 80%, and TA2 titaniums band blank is cold-rolled to 0.3 ~ 1.0mm, obtains semi-finished product titanium band, spare;
Step 3, degreasing:The semi-finished product titanium band in step 2 is taken to carry out continuous wash and drying to it using degreasing unit, is prepared Surface is obtained without greasy dirt, drying, clean cold rolling titanium strip coil, it is spare;
Step 4, continuous annealing:Flat place is carried out out to the cold rolled titanium band volume in step 3 using the continuous annealing line of argon gas protection Reason, it is split it is flat treated that cold rolled titanium band volume carries out line annealing, titanium band can be carried out by the way of continuous annealing Kaiping processing is changed in traditional titanium volume bell-type annealing and is directly heated and cold to whole in order to realizing the direct laser heating of individual layer But the problem of efficiency is low, 600 ~ 750 degrees Celsius of annealing temperature, 1 ~ 5min of annealing soaking time;
Step 5, pickling:Using mix acid liquor to titanium band carries out pickling, and dries after continuous annealing treatment in step 4;
Step 6, it is smooth:Skin pass rolling carries out step 5 treated titanium band using planisher, control temper mill roller is advance Laser roughening processing is carried out, roughness is 0.5 ~ 4 μm after roller texturing, and skin pass rolling drafts is 0.5 ~ 2%, temper mill roller After frosting treatment, smooth processing is carried out to titanium band, transfers to form frosted face to improve roughness in titanium belt surface, general titanium is with table Surface roughness is the 20 ~ 50% of texturing roller roughness.Smooth processing is also used for improving titanium strip coil case hardness;
Step 7, degreasing sampling:It takes step 6 treated the degreasing method that titanium band is repeated in step 3 to carry out ungrease treatment, obtain Obtain welded tube TA2 cold rolled titaniums band finished product.
The mix acid liquor is hydrofluoric acid, the mixture of nitric acid, water, and wherein hydrofluoric acid mass concentration is 1.5 ~ 3%, nitre Sour mass concentration is 12 ~ 20%, remaining as water.
The step three semi-finished product titanium band degreasing speed is 5 ~ 10m/ minutes, 40 ~ 65 degrees Celsius of degreaser temperature, drying 40 ~ 60 degrees Celsius of box temperature degree.
The beneficial effects of the invention are as follows:
1st, this patent passes through [O]WhenIt characterizes raw material and strengthens impurity element whole content, and give optimum range, in dispensing mistake It is controlled in journey, in combination with follow-up cold rolling, annealing and flattening process measure, realizes control welded tube TA2 cold rolled titaniums band horizontal stroke Be in 260 ~ 350MPa reduced levels to yield strength, effectively reduce welded tube forming drag, so reduce titanium band and welded tube into Frictional force between type roller mould, so as to greatly improve welded tube forming roll service life.
2nd, by using laser roughening roller light reduction skin pass rolling, case hardness and roughness are promoted simultaneously, table Surface hardness reaches more than 160HV0.5, and roughness reaches 0.3 ~ 1.0 μm, significantly reduces titanium band and molding roller mould adhesiveness, Efficiently solve titanium welding pipe surface forming polishing scratch defect quality problems.
3rd, welded tube is produced using TA2 cold rolled titaniums band prepared by the art of this patent, it is more easily molded, it is less prone to surface polishing scratch and lacks It falls into, the main behaviour's debugging technical ability of butt welding pipeline and mould design and manufacture Capability Requirement reduce, and have good production adaptability, reduce Welded tube production difficulty, stay in grade are reliable.
4th, welded tube is produced using welded tube titanium band prepared by the art of this patent, producing line speed of production is high, forming roller die life Long, stay in grade, rejection rate is low, therefore has the advantages that presentation quality is good, production efficiency is high, production cost is low.
Specific embodiment
Specific embodiment is as follows:
Embodiment 1:Use titanium sponge and TiO2Dispensing is carried out, O, Fe, C, N impurity content mass percent are distinguished after dispensing It is 0.125%, 0.018%, 0.017%, 0.01%, [O]When=[O]%+0.5*[Fe]%+ 0.7*[C]%+2.5*[N]%=0.125%+ 0.5*0.018%+0.7* 0.017%+2.5*0.01%=0.1709%, and by works such as melting, forging, hot rolling, cold rolling, annealing Sequence obtains thickness as the pure titanium cold rolled titanium band blanks of 1.0mm annealed states TA2;Cold rolling is carried out to titanium band blank using cold mill complex, it is cold It is rolled to 0.404mm target thicknesses, cold rolling reduction 59.6%;Cold rolled titanium band is cleaned using degreasing unit, is dried;Using Argon gas protection continuous annealing line carries out out cold rolled titanium band flat annealing, 720 degrees Celsius of annealing temperature, soaking time 4min;Using " hydrofluoric acid+nitric acid+water " mix acid liquor carries out pickling to cold rolled titanium band after continuous annealing, and dries;Then use roughness for 2.0 μm of laser roughening rollers carry out titanium band skin pass rolling, smooth drafts 0.8%, smooth rear degreasing sampling, the TA2 cold rollings of acquisition Titanium strip coil performance and surface roughness are shown in Table 1.
Comparative example 1:Be respectively 0.13% using O, Fe, C, N impurity content mass percent, 0.08%, 0.017%, 0.015%, [O]When=0.2194% dispensing raw material carry out 0.4mm cold rolled titaniums band and prepare, and laser roughening is not carried out after finished products Roller skin pass rolling, the titanium strip coil performance and surface roughness of acquisition are shown in Table 1.
By table 1 as it can be seen that embodiment 1 obtains the 0.4mm thickness specifications TA2 suitable for welded tube forming using the art of this patent Cold rolled titanium band, the control of titanium band strength, hereinafter, simultaneously by laser roughening roller skin pass rolling, significantly improve titanium band table in 350MPa Surface hardness and roughness.Comparative example 1 prepares titanium band, and do not carry out hair using ingredient beyond this patent composition range titanium band blank Change rolls out whole rolling process, and obtained titanium band transverse yield strength is high, case hardness is low, surface roughness is small.With 1 phase of comparative example Than, laterally surrender is low, case hardness is high, roughness is big for the titanium band that embodiment 1 obtains, and effectively reduces welded tube forming drag, and Improve surface abrasion resistance, do not occur be molded polishing scratch defect, and after each reconditioning of welded tube forming roller mould service life by 350,000 Meter Ti Gao is to 80 myriametres, while welded tube is more easily molded, and producing line production efficiency improves more than 20%, and advantage is notable.
1 embodiment 1 of table and 1 cold rolled titanium of comparative example band welded tube produce and use Contrast on effect table
Embodiment 2:Use titanium sponge and TiO2Dispensing is carried out, O, Fe, C, N impurity content mass percent are distinguished after dispensing It is 0.085%, 0.031%, 0.012%, 0.006%, [O]When=[O]%+0.5*[Fe]% +0.7*[C]%+2.5*[N]%=0.085%+ 0.5*0.031%+0.7*0.012%+2.5*0.006%=0.1239%, and by works such as melting, forging, hot rolling, cold rolling, annealing Sequence obtains thickness as the pure titanium cold rolled titanium band blanks of 2.0mm annealed states TA2;Cold rolling is carried out to titanium band blank using cold mill complex, it is cold It is rolled to 0.709 mm target thicknesses, cold rolling reduction 64.6%;Cold rolled titanium band is cleaned using degreasing unit, is dried;Using Argon gas protection continuous annealing line carries out out cold rolled titanium band flat annealing, 680 degrees Celsius of annealing temperature, soaking time 3min;Using " hydrofluoric acid+nitric acid+water " mix acid liquor carries out pickling to cold rolled titanium band after continuous annealing, and dries;Then use roughness for 2.5 μm of laser roughening rollers carry out titanium band skin pass rolling, smooth drafts 1.2%, smooth rear degreasing sampling, the TA2 cold rollings of acquisition Titanium strip coil performance and surface roughness are shown in Table 2.
Comparative example 2:Welded tube TA2 cold rolled titaniums are prepared using ingredient composition raw material same as Example 2 and processing technology Band, but finished product does not carry out laser roughening roller skin pass rolling, and the titanium band performance and surface roughness of acquisition are shown in Table 2.
By table 2 as it can be seen that embodiment 2 obtains the 0.7mm thickness specifications TA2 suitable for welded tube forming using the art of this patent Cold rolled titanium band, the control of titanium band strength, hereinafter, simultaneously by laser roughening roller skin pass rolling, it is hard to significantly improve surface in 350MPa Degree and roughness.Same size cold rolled titanium band prepared by comparative example 2, does not carry out finished product texturing roller skin pass rolling, although laterally bending It is relatively low taking intensity, but case hardness is low, roughness is small, surface abrasion resistance is poor, during welded tube is produced, titanium band and forming roller Mold adhesiveness is strong, surface of welded pipe molding polishing scratch defect easily occurs, and cause to need frequently to repair roller in production process, welded tube forming roll Die life is low.Compared with comparative example 2, embodiment 2 solves the above problem, the TA2 cold rolled titaniums prepared using embodiment 2 Band production welded tube, surface reduce titanium band with being molded the adhesiveness of roller mould, extend welded tube forming roll without molding polishing scratch defect Die life, service life is improved by 40 myriametres to 75 myriametres, and production process after each reconditioning of welded tube forming roller mould Middle abnormal quality is small, production efficiency is high, and advantage is notable.
2 embodiment 2 of table and 2 cold rolled titanium of comparative example band welded tube produce and use Contrast on effect table
Technical solution and embodiment and non-limiting cited by the present invention, with the technical solution cited by the present invention and implementation Mode is equivalent or effect same approach is all in the range of the present invention protects.

Claims (3)

1. a kind of preparation method of low-intensity, easily molded welded tube TA2 cold rolled titanium bands, it is characterised in that:Include the following steps:
Step 1: raw material prepare:Take major ingredient titanium sponge and dispensing titanium dioxide and be pressed into electrode, define dispensing Fe, C, N, O impurity contents mass percent is respectively [Fe] %, [C] %, [N] %, [O] %, is defined [O]WhenFor characterizing dispensing impurity Element whole content, then dispensing impurity element components meet the following conditions:
[O]When=[O] %+0.5* [Fe] %+0.7* [C] %+2.5* [N] %=0.10 ~ 0.20%,
Then by the electrode suppressed is smelting successively, forging, hot rolling, cold rolling, annealing operation, acquisition thickness is 0.6 ~ 2.5mm Annealed state TA2 cold rolled titaniums band blank;
Step 2, cold rolling:The titanium band blank being prepared in step 1 is taken, TA2 titaniums band blank is carried out using cold mill complex cold It rolls, control cold rolling reduction is 40 ~ 80%, and TA2 titaniums band blank is cold-rolled to 0.3 ~ 1.0mm, obtains semi-finished product titanium band, spare;
Step 3, degreasing:The semi-finished product titanium band in step 2 is taken to carry out continuous wash and drying to it using degreasing unit, is prepared Surface is obtained without greasy dirt, drying, clean cold rolling titanium strip coil, it is spare;
Step 4, continuous annealing:Flat place is carried out out to the cold rolled titanium band volume in step 3 using the continuous annealing line of argon gas protection Reason, split flat treated cold rolled titanium band volume carries out line annealing, 600 ~ 750 degrees Celsius of annealing temperature, during annealing heat preservation Between 1 ~ 5min;
Step 5, pickling:Using mix acid liquor to titanium band carries out pickling, and dries after continuous annealing treatment in step 4;
Step 6, it is smooth:Skin pass rolling is carried out to step 5 treated titanium band using planisher, first temper mill roller is carried out Laser roughening is handled, and roughness is 0.5 ~ 4 μm after roller texturing, then carries out skin pass rolling, and control skin pass rolling drafts is 0.5~2%;
Step 7, degreasing sampling:It takes step 6 treated the degreasing method that titanium band is repeated in step 3 to carry out ungrease treatment, obtain Obtain welded tube TA2 cold rolled titaniums band finished product.
2. a kind of low-intensity according to claim 1, the easily molded welded tube preparation method of TA2 cold rolled titanium bands, feature It is:The mix acid liquor is hydrofluoric acid, the mixture of nitric acid, water, and wherein hydrofluoric acid mass concentration is 1.5 ~ 3%, nitric acid matter A concentration of 12 ~ 20% are measured, remaining as water.
3. a kind of low-intensity according to claim 1, the preparation method of easily molded welded tube TA2 cold rolled titanium bands, It is characterized in that:The step three semi-finished product titanium band degreasing speed is 5 ~ 10m/ minutes, 40 ~ 65 degrees Celsius of degreaser temperature, 40 ~ 60 degrees Celsius of drying box temperature.
CN201810138353.6A 2018-02-10 2018-02-10 Preparation method of TA2 cold-rolled titanium strip for low-strength and easy-to-form welded pipe Active CN108165822B (en)

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Cited By (4)

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CN109127781A (en) * 2018-06-28 2019-01-04 洛阳双瑞精铸钛业有限公司 A kind of smooth template technique for cold rolled titanium roll
CN109797313A (en) * 2018-12-19 2019-05-24 洛阳双瑞精铸钛业有限公司 A kind of cookware punching press titanium volume and preparation method thereof
CN111872115A (en) * 2020-06-19 2020-11-03 洛阳双瑞精铸钛业有限公司 Process method for improving surface roughness of cold-rolled titanium strip coil
CN112620346A (en) * 2020-11-13 2021-04-09 江苏甬金金属科技有限公司 Production method of wide-width precise cold-rolled titanium material

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Publication number Priority date Publication date Assignee Title
CN109127781A (en) * 2018-06-28 2019-01-04 洛阳双瑞精铸钛业有限公司 A kind of smooth template technique for cold rolled titanium roll
CN109797313A (en) * 2018-12-19 2019-05-24 洛阳双瑞精铸钛业有限公司 A kind of cookware punching press titanium volume and preparation method thereof
CN111872115A (en) * 2020-06-19 2020-11-03 洛阳双瑞精铸钛业有限公司 Process method for improving surface roughness of cold-rolled titanium strip coil
CN112620346A (en) * 2020-11-13 2021-04-09 江苏甬金金属科技有限公司 Production method of wide-width precise cold-rolled titanium material

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