CN105251804B - A kind of milling method of six square rod of TC6 titanium alloys - Google Patents

A kind of milling method of six square rod of TC6 titanium alloys Download PDF

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Publication number
CN105251804B
CN105251804B CN201510712435.3A CN201510712435A CN105251804B CN 105251804 B CN105251804 B CN 105251804B CN 201510712435 A CN201510712435 A CN 201510712435A CN 105251804 B CN105251804 B CN 105251804B
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pass
bar stock
rolled
rolling
milling
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CN105251804A (en
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杜小联
董卫选
和永岗
李军
白洁
张晓园
孙峰
雷锦文
何永胜
王永哲
赖运金
刘向宏
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Western Superconducting Technologies Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/045Manufacture of wire or bars with particular section or properties

Abstract

The invention discloses a kind of milling method of six square rod of TC6 titanium alloys, including:Choose the TC6 titanium alloy pole bar stocks that structure property meets requirements of the national standard;The rolling groove of bar stock is designed as flat-rolled pass, 120 ° of edging passes and finished product and rolls pass;Bar stock is passed sequentially through flat-rolled pass, 120 ° of edging passes and finished product to roll pass and rolled, obtains shaping bar stock;It will obtain shaping bar stock and carry out electrical contact stretcher leveling processing;Shaping bar stock after processing is placed on atmospheric furnace and carries out air annealing, is air-cooled to room temperature;Bar stock after processing is cut off and is surface-treated, wherein, six square rod of TC6 titanium alloys is finally made by the way of pickling after first sandblasting in surface treatment.The present invention can reduce the waste of raw material, and production efficiency is high, be adapted to large-scale production, and obtained six square rods of TC6 have the advantages that structural homogenity is good, stability is high, are applicable to the technical field with requirements at the higher level.

Description

A kind of milling method of six square rod of TC6 titanium alloys
Technical field
The invention belongs to technical field of nonferrous metal processing, and in particular to a kind of milling method of six square rod of TC6 titanium alloys.
Background technology
TC6 titanium alloys are martensite type alpha+beta two-phase thermal strength titanium alloys, are current most widely used Ti~Al~Mo~Cr ~Fe~Si series titanium alloys, its nominal composition are Ti~6Al~1.5Mo~2.5Cr~0.5Fe~0.3Si, can be 400~450 Long-term work at DEG C, is mainly used for blade of aviation engine, rotating member and fastener.The alloy not only has good hot-working Performance, and there is comparatively ideal comprehensive mechanical property, thus each airplane design and main engine plants to the demands of TC6 materials increasingly Increase.The traditional handicraft of six square rods of TC6 is formed using bar through turnning and milling technique productions, and due to turnning and milling technique, there are waste of raw materials Greatly, the shortcomings of production efficiency is low, obtained six square rod stability of TC6 is poor, is not suitable for producing in enormous quantities.
The content of the invention
The object of the present invention is to provide a kind of milling method of six square rod of TC6 titanium alloys, solves existing six square rods of TC6 life The problem of waste of raw materials existing for production. art is big, obtained six square rod stability of TC6 is poor.
The technical solution adopted in the present invention is:A kind of milling method of six square rod of TC6 titanium alloys, specifically includes following step Suddenly:
Step 1, choose rolling bar stock:
Choose the TC6 titanium alloy pole bar stocks that structure property meets standard GB/T/T2965 requirements, bar stock rough surface Degree is not more than 3.2 μm;
Step 2, design rolling groove:
The rolling groove of TC6 titanium alloy pole bar stocks is designed as flat-rolled pass, 120 ° of edging passes and finished product and rolls pass;
Step 3, TC6 titanium alloy pole bar stocks are passed sequentially through flat-rolled pass, 120 ° of edging passes that step 2 designs and into Product roll pass and are rolled, and obtain shaping bar stock;
Step 4, by step 3 obtain shaping bar stock carry out electrical contact stretcher leveling processing;
Step 5, step 4 is handled after shaping bar stock be placed on atmospheric furnace carry out air annealing, air cooling to room Temperature;
Step 6, step 5 is handled after bar stock cut off and be surface-treated, wherein, after surface treatment is using first sandblasting The mode of pickling, is finally made six square rod of TC6 titanium alloys.
The features of the present invention also resides in,
Rolling groove design in step 2 further includes edging pass design.
Edging pass rolling is further included in step 3, edging pass rolling is located at flat-rolled groove rolling and 120 ° of edging passes Between rolling.
The specific implementation method of edging pass rolling process is:Bar stock is rolled by edging pass, roll mill is adopted With two roller reversible milling trains, pass deformation is 15%~30%, 800~950 DEG C of rolling temperature.
The specific implementation step of step 3 is:
Step 3.1, by TC6 titanium alloy poles bar stock using electric contact type heating devices heat to 800~950 DEG C, then Rolled by flat-rolled pass, roll mill uses two roller reversible milling trains, and pass deformation is 15%~30%;
Step 3.2, rolled the bar stock that step 3.1 obtains by 120 ° of edging passes, and roll mill can using two rollers Inverse formula milling train, pass deformation are 15%~30%, 800~950 DEG C of rolling temperature;
Step 3.3, the bar stock for obtaining step 3.2 first carry out pickling processes, and acid cleaning process need to be stirred continuously, pickling time For 1~2h;The bar stock after pickling is rolled pass by finished product again to be rolled, roll mill is rolled using four-high reversing mill, Pass deformation is 10%~15%, and rolling temperature is not less than 680 DEG C.
In step 4, straightening temperature is 800~950 DEG C, and aligning electric current is 1000~3000A, hydraulic pressure is 5~ 40MPa, aligning length are 1.5~4.0m.
In step 5, heat treatment temperature is 800~850 DEG C, heat treatment time is 1~2h.
In step 6, pickle is the mixture of hydrofluoric acid, nitric acid and water, and the percent by volume of hydrofluoric acid, nitric acid and water is 1:3:7。
A kind of beneficial effect of the milling method of six square rod of TC6 titanium alloys of the present invention is led to using forging preparation process, complete The traditional turnning and milling technique of six square rod of TC6 titanium alloys is changed entirely, so as to greatly reduce the usage amount of raw material, reduces raw material Waste;By the rolling of a variety of rolling grooves, blank can be made to obtain finished product by the technological process less than conventional method, so that Production efficiency is improved, is adapted to large-scale production;Also, there is structural homogenity by six square rods of TC6 made from present invention process Well, the advantages of stability is high, is applicable to the technical field with requirements at the higher level.
Brief description of the drawings
Fig. 1 is a kind of hole type design figure of the milling method of six square rod of TC6 titanium alloys of the present invention, wherein, Fig. 1 (a) is flat Pass is rolled, Fig. 1 (b) is edging pass, and Fig. 1 (c) is 120 ° of edging passes, and Fig. 1 (d) is last groove;
Fig. 2 is the hole type design figure of the embodiment of the present invention 1, wherein, Fig. 2 (a) is flat-rolled pass, and Fig. 2 (b) is edging pass for rolling Type, Fig. 2 (c) are 120 ° of edging passes, and Fig. 2 (d) is last groove;
Fig. 3 is through six square rod S14 micro-organization charts of TC6 titanium alloys made from the embodiment of the present invention 1;
Fig. 4 is the hole type design figure of the embodiment of the present invention 2, wherein, Fig. 4 (a) is flat-rolled pass, and Fig. 4 (b) is 120 ° of rollings on edge Pass, Fig. 4 (c) are last groove;
Fig. 5 is through six square rod S22 micro-organization charts of TC6 titanium alloys made from the embodiment of the present invention 2.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of milling method of six square rod of TC6 titanium alloys of the present invention, specifically includes following steps:
Step 1, choose rolling bar stock:
Choose the TC6 titanium alloy pole bar stocks that structure property meets standard GB/T/T2965 requirements, bar stock rough surface Degree is not more than 3.2 μm, and bar stock specification size is determined according to finished product and deflection 30%~50%, its chemical composition is shown in Table 1;
1 TC6 titanium alloy pole bar stock component lists of table
Step 2, design rolling groove:
By the rolling groove of TC6 titanium alloy pole bar stocks be designed as flat-rolled pass, edging pass, 120 ° of edging passes and into Product roll pass;
It is flat-rolled pass as shown in Fig. 1 (a), wherein R1 is 10~60mm, and R2 is 20~80mm, h=1/2 (S ± 1) mm (note:S is six square rod specification sizes), b=S+ (3~7) mm, r=2~5mm;
It is edging pass as shown in Fig. 1 (b), wherein R is 10~80mm, h=S+ (0.5~3.0) mm, b=S+ (3~6) Mm, r1 and r2 are 1~4mm, α=60~90 °;
It is 120 ° of edging passes as shown in Fig. 1 (c), wherein α=(120 ± 2) °, r=2~4mm, b=S+ (3~+∝);
It is last groove as shown in Fig. 1 (d), wherein h=1/2 (S+ (0~0.5)), α=120~(0~2) °, r=1~ 3mm。
Step 3, that TC6 titanium alloy pole bar stocks are passed sequentially through to flat-rolled pass, edging pass, 120 ° that step 2 designs is vertical Roll pass and finished product rolls pass and rolled, obtain shaping bar stock;
Step 3.1, by TC6 titanium alloy poles bar stock using electric contact type heating devices heat to 800~950 DEG C, then Rolled by flat-rolled pass, roll mill uses two roller reversible milling trains, and pass deformation is 15%~30%;
Step 3.2, the bar stock for obtaining step 3.1 are rolled by edging pass, and roll mill uses two roller reversibles Milling train, pass deformation are 15%~30%, 800~950 DEG C of rolling temperature;
Step 3.3, the bar stock for obtaining step 3.2 are rolled by edging pass, and roll mill uses two roller reversibles Milling train, pass deformation are 15%~30%, 800~950 DEG C of rolling temperature;
Step 3.4, the bar stock for obtaining step 3.3 first carry out pickling processes, and acid cleaning process need to be stirred continuously, pickling time For 1~2h;The bar stock after pickling is rolled pass by finished product again to be rolled, roll mill is rolled using four-high reversing mill, Pass deformation is 10%~15%, and rolling temperature is not less than 680 DEG C;
Step 4, by step 3 obtain shaping bar stock carry out electrical contact stretcher leveling processing, straightening temperature be 800~950 DEG C, Aligning electric current is 1000~3000A, and hydraulic pressure is 5~40MPa, and aligning length is 1.5~4.0m;
Step 5, step 4 is handled after shaping bar stock be placed on atmospheric furnace and carry out air annealing, heat treatment temperature is 800~850 DEG C, heat treatment time be 1~2h, air cooling to room temperature;
Step 6, step 5 is handled after bar stock cut off and be surface-treated, wherein, surface treatment is using first sandblasting The mode of pickling afterwards;Pickle is the mixture of hydrofluoric acid, nitric acid and water, and the percent by volume of hydrofluoric acid, nitric acid and water is 1: 3:7, six square rod of TC6 titanium alloys is finally made.
Embodiment 1
Prepare six square rod S14 of TC6 titanium alloys:
Choose the TC6 titanium alloy pole bar stocks that structure property meets standard GB/T/T2965 requirements, Φ 19.6mm, bar stock 3.2 μm of surface roughness;The rolling groove of TC6 titanium alloy pole bar stocks is designed as flat-rolled pass, edging pass, 120 ° of rollings on edge Pass and finished product roll pass, its hole type design as shown in Fig. 2,
Fig. 2 (a) is flat-rolled pass:Wherein R1 is 15mm, R2 20, h=6.7mm, b=18mm, r=3mm;
Fig. 2 (b) is edging pass, and wherein R is that 20mm, h=10.8mm, b=21mm, r1 and r2 are 2mm, α=80 °;
Fig. 2 (c) is 120 ° of edging passes, wherein α=120 °, r=2mm, b=18.6mm;
Fig. 2 (d) rolls pass, wherein h=7mm, α=120 °, r=1mm for finished product.
By TC6 titanium alloy poles bar stock using electric contact type heating devices heat to 800 DEG C, then by flat-rolled pass into Row rolling, roll mill use two roller reversible milling trains, pass deformation 15%;Obtained bar stock is carried out by edging pass Rolling, roll mill use two roller reversible milling trains, pass deformation 15%, 800 DEG C of rolling temperature;Obtained bar stock is passed through Edging pass is rolled, and roll mill uses two roller reversible milling trains, pass deformation 15%, 800 DEG C of rolling temperature;Will To bar stock first carry out pickling processes, acid cleaning process need to be stirred continuously, pickling time 1h;The bar stock after pickling is passed through into again Product roll pass and are rolled, and roll mill is rolled using four-high reversing mill, pass deformation 10%, 680 DEG C of rolling temperature; It will obtain shaping bar stock and carry out electrical contact stretcher leveling processing, straightening temperature is 800 DEG C, and aligning electric current is 1000A, hydraulic pressure For 5MPa, aligning length is 1.5m;Shaping bar stock after processing is placed on atmospheric furnace and carries out air annealing, heat treatment temperature For 800 DEG C, heat treatment time 1h, air cooling to room temperature;Bar stock after processing is cut off and is surface-treated, wherein, By the way of surface treatment is using pickling after first sandblasting, pickle for hydrofluoric acid, nitric acid and water mixture, hydrofluoric acid, nitric acid and The percent by volume of water is 1:3:7;Finally obtained six square rod of TC6 titanium alloys.Detected using properties of product made from the present embodiment 2 are shown in Table, microscopic structure metallograph is shown in Fig. 3, obtained six square rod uniform texture of TC6 titanium alloys.
2 TC6 of table, six square rod S14 results of property
Embodiment 2
Prepare six square rod S22 of TC6 titanium alloys:
Choose the TC6 titanium alloy pole bar stocks that structure property meets standard GB/T/T2965 requirements, Φ 28mm, bar stock table 3 μm of surface roughness;The rolling groove of TC6 titanium alloy pole bar stocks is designed as flat-rolled pass, 120 ° of edging passes and finished product to roll Pass, its hole type design as shown in figure 4,
Fig. 4 (a) is flat-rolled pass:Wherein R1 is 45mm, R2 50, h=12.4mm, b=21mm, r=4mm;
Fig. 4 (b) is 120 ° of edging passes, wherein α=120 °, r=2mm, b=45.6mm;
Fig. 4 (c) rolls pass, wherein h=11mm, α=120 °, r=1.5mm for finished product.
By TC6 titanium alloy poles bar stock using electric contact type heating devices heat to 900 DEG C, then by flat-rolled pass into Row rolling, roll mill use two roller reversible milling trains, pass deformation 25%;Obtained bar stock is passed through into 120 ° of edging passes Rolled, roll mill uses two roller reversible milling trains, pass deformation 25%, 900 DEG C of rolling temperature;The bar stock that will be obtained Pickling processes are first carried out, acid cleaning process need to be stirred continuously, pickling time 1.5h;The bar stock after pickling is rolled into hole by finished product again Type is rolled, and roll mill is rolled using four-high reversing mill, pass deformation 12%, 700 DEG C of rolling temperature;It will obtain Shaping bar stock carries out electrical contact stretcher leveling processing, and straightening temperature is 900 DEG C, and aligning electric current is 2000A, and hydraulic pressure is 25MPa, aligning length are 3m;Shaping bar stock after processing is placed on atmospheric furnace and carries out air annealing, heat treatment temperature is 830 DEG C, heat treatment time 1.5h, air cooling to room temperature;Bar stock after processing is cut off and is surface-treated, wherein, By the way of surface treatment is using pickling after first sandblasting, pickle for hydrofluoric acid, nitric acid and water mixture, hydrofluoric acid, nitric acid and The percent by volume of water is 1:3:7, six square rod of TC6 titanium alloys is finally made.Detected using properties of product made from the present embodiment 3 are shown in Table, microscopic structure metallograph is shown in Fig. 5, obtained six square rod uniform texture of TC6 titanium alloys.
3 TC6 titanium alloys of table, six square rod S22 results of property
Embodiment 3
Prepare six square rod S14 of TC6 titanium alloys:
Choose the TC6 titanium alloy pole bar stocks that structure property meets standard GB/T/T2965 requirements, Φ 19.6mm, bar stock 2.2 μm of surface roughness;The rolling groove of TC6 titanium alloy pole bar stocks is designed as flat-rolled pass, edging pass, 120 ° of rollings on edge Pass and finished product roll pass, and TC6 titanium alloy poles bar stock is used electric contact type heating unit by its hole type design with embodiment 1 950 DEG C are heated to, is then rolled by flat-rolled pass, roll mill uses two roller reversible milling trains, and pass deformation is 30%;Obtained bar stock is rolled by edging pass, roll mill uses two roller reversible milling trains, and pass deformation is 30%, 950 DEG C of rolling temperature;Obtained bar stock is rolled by edging pass, roll mill uses two roller reversible milling trains, Pass deformation is 30%, 950 DEG C of rolling temperature;Obtained bar stock is first subjected to pickling processes, acid cleaning process need to be stirred continuously, Pickling time is 2h;The bar stock after pickling is rolled pass by finished product again to be rolled, roll mill uses four-high reversing mill Rolling, pass deformation 15%, 720 DEG C of rolling temperature;It will obtain shaping bar stock and carry out electrical contact stretcher leveling processing, aligning Temperature is 950 DEG C, and aligning electric current is 3000A, and hydraulic pressure 40MPa, aligning length is 4m;Shaping bar stock after processing is put Air annealing is carried out in atmospheric furnace, heat treatment temperature is 850 DEG C, heat treatment time 2h, air cooling to room temperature;Will place Bar stock after reason is cut off and is surface-treated, wherein, by the way of pickling after first sandblasting, pickle is hydrogen fluorine for surface treatment The mixture of acid, nitric acid and water, the percent by volume of hydrofluoric acid, nitric acid and water is 1:3:7;Finally obtained six side of TC6 titanium alloys Rod.

Claims (5)

1. a kind of milling method of six square rod of TC6 titanium alloys, it is characterised in that specifically include following steps:
Step 1, choose rolling bar stock:
The TC6 titanium alloy pole bar stocks that structure property meets standard GB/T/T2965 requirements are chosen, bar stock surface roughness is not More than 3.2 μm;
Step 2, design rolling groove:
The rolling groove of TC6 titanium alloy pole bar stocks is designed as flat-rolled pass, 120 ° of edging passes and finished product and rolls pass;
Step 3, pass sequentially through flat-rolled pass, 120 ° of edging passes and finished product that step 2 designs by TC6 titanium alloy pole bar stocks and roll Pass is rolled, and obtains shaping bar stock;Specific implementation step is:
Step 3.1, by TC6 titanium alloy poles bar stock using electric contact type heating devices heat to 800~950 DEG C, then pass through Flat-rolled pass is rolled, and roll mill uses two roller reversible milling trains, and pass deformation is 15%~30%;
Step 3.2, rolled the bar stock that step 3.1 obtains by 120 ° of edging passes, and roll mill uses two roller reversibles Milling train, pass deformation are 15%~30%, 800~950 DEG C of rolling temperature;
Step 3.3, the bar stock for obtaining step 3.2 first carry out pickling processes, and acid cleaning process need to be stirred continuously, pickling time 1 ~2h;The bar stock after pickling is rolled pass by finished product again to be rolled, roll mill is rolled using four-high reversing mill, passage Deflection is 10%~15%, and rolling temperature is not less than 680 DEG C;
Step 4, by step 3 obtain shaping bar stock carry out electrical contact stretcher leveling processing, straightening temperature be 800~950 DEG C, aligning Electric current is 1000~3000A, and hydraulic pressure is 5~40MPa, and aligning length is 1.5~4.0m;
Step 5, step 4 is handled after shaping bar stock be placed on atmospheric furnace and carry out air annealing, treatment temperature for 800~ 850 DEG C, heat treatment time is 1~2h, air cooling to room temperature;
Step 6, step 5 is handled after bar stock cut off and be surface-treated, wherein, surface treatment is using pickling after first sandblasting Mode, final obtained six square rod of TC6 titanium alloys.
2. the milling method of a kind of six square rod of TC6 titanium alloys according to claim 1, it is characterised in that in the step 2 Rolling groove design further include the design of 60~90 ° of edging passes.
3. the milling method of a kind of six square rod of TC6 titanium alloys according to claim 2, it is characterised in that in the step 3 60~90 ° of edging pass rolling process are further included, 60~90 ° of edging passes rolling is vertical positioned at flat-rolled groove rolling and 120 ° Roll between groove rolling.
4. the milling method of a kind of six square rod of TC6 titanium alloys according to claim 3, it is characterised in that described 60~90 ° The specific implementation method of edging pass rolling process is:Bar stock is rolled by 60~90 ° of edging passes, roll mill uses Two roller reversible milling trains, pass deformation are 15%~30%, 800~950 DEG C of rolling temperature.
A kind of 5. milling method of six square rod of TC6 titanium alloys according to claim 1, it is characterised in that the step 6 In, the washing lotion of pickling is the mixture of hydrofluoric acid, nitric acid and water, and the percent by volume of hydrofluoric acid, nitric acid and water is 1:3:7.
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CN106363021B (en) * 2016-08-30 2018-08-10 西部超导材料科技股份有限公司 A kind of milling method of 1500MPa grades of titanium alloy rod bar
CN109092916A (en) * 2018-08-14 2018-12-28 重庆高科异型材制造有限公司 Hardly possible deformation high alloy high-precision section material production technology and special-shaped microfilament production line

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