CN105251804A - Rolling method for TC6 titanium alloy hexagonal rod - Google Patents
Rolling method for TC6 titanium alloy hexagonal rod Download PDFInfo
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- CN105251804A CN105251804A CN201510712435.3A CN201510712435A CN105251804A CN 105251804 A CN105251804 A CN 105251804A CN 201510712435 A CN201510712435 A CN 201510712435A CN 105251804 A CN105251804 A CN 105251804A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture 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
- B21C37/045—Manufacture of wire or bars with particular section or properties
Abstract
The invention discloses a rolling method for a TC6 titanium alloy hexagonal rod. The rolling method comprises the steps that a TC6 titanium alloy round rod blank with the structure performance meeting the national standard requirement is selected; rolling hole types of the rod blank are designed to be a flat rolling hole type, a 120-degree vertical rolling hole type and a finished product rolling hole type; the rod blank is rolled through the flat rolling hole type, the 120-degree vertical rolling hole type and the finished product rolling hole type in sequence, and a formed rod blank is obtained; electric contact tension straightening treatment is carried out on the obtained formed rod blank; the treated formed rod blank is placed in an atmosphere furnace for atmosphere annealing treatment, and air cooling is carried out to room temperature; and head cutting and surface treatment are carried out on the treated rod blank, the manner of carrying out sand blasting and acid pickling in sequence is adopted in surface treatment, and finally the TC6 titanium alloy hexagonal rod is manufactured. Waste of raw materials can be reduced, production efficiency is high, the rolling method is suitable for large-scale production, and the manufactured TC6 hexagonal rod has the beneficial effects of being good in structure evenness and high in stability, and can be applied to the technical field with higher requirements.
Description
Technical field
The invention belongs to technical field of nonferrous metal processing, be specifically related to a kind of milling method of TC6 titanium alloy six square rod.
Background technology
TC6 titanium alloy is martensite type alpha+beta two-phase thermal strength titanium alloy, it is current most widely used Ti ~ Al ~ Mo ~ Cr ~ Fe ~ Si series titanium alloy, its nominal composition is Ti ~ 6Al ~ 1.5Mo ~ 2.5Cr ~ 0.5Fe ~ 0.3Si, can long-term work at 400 ~ 450 DEG C, be mainly used in blade of aviation engine, tumbler and securing member.This alloy not only has good hot-working character, and has comparatively ideal comprehensive mechanical property, therefore each airplane design and the demand of main engine plants to TC6 material day by day increase.The traditional handicraft of TC6 six square rod adopts bar to form through turnning and milling explained hereafter, there is the shortcomings such as waste of raw materials is large, production efficiency low, obtained TC6 six square rod poor stability, be not suitable for producing in enormous quantities due to turnning and milling technique.
Summary of the invention
The object of this invention is to provide a kind of milling method of TC6 titanium alloy six square rod, solve the problem of large, the obtained TC6 six square rod poor stability of waste of raw materials that existing TC6 six square rod production technology exists.
The technical solution adopted in the present invention is: a kind of milling method of TC6 titanium alloy six square rod, specifically comprises the following steps:
Step 1, choose rolling rod base:
Choose the TC6 titanium alloy pole rod base that structure property meets standard GB/T/T2965 requirement, excellent base surface roughness is not more than 3.2 μm;
Step 2, design rolling groove:
The rolling groove of TC6 titanium alloy pole rod base is designed to flat-rolled pass, 120 ° of edging passes and finished product and rolls pass;
Step 3, TC6 titanium alloy pole rod base the flat-rolled pass, 120 ° of edging passes and the finished product that are designed by step 2 are successively rolled pass be rolled, obtain moulding stick base;
Step 4, step 3 is obtained moulding stick base carry out electrical contact stretcher leveling process;
Step 5, step 4 is processed after moulding stick base be placed on atmospheric furnace and carry out air annealing in process, Air flow is to room temperature;
Step 6, step 5 is processed after excellent base carry out crop and surface treatment, wherein, surface treatment adopts the mode of pickling after first sandblasting, final obtained TC6 titanium alloy six square rod.
Feature of the present invention is also,
Rolling groove design in step 2 also comprises edging pass design.
Also comprise edging pass rolling in step 3, edging pass rolling is between flat-rolled groove rolling and 120 ° of edging pass rollings.
The specific implementation method of edging pass rolling process is: be rolled by edging pass by excellent base, and roll mill adopts two roller reversible milling trains, and pass deformation is 15% ~ 30%, rolling temperature 800 ~ 950 DEG C.
The concrete implementation step of step 3 is:
Step 3.1, by TC6 titanium alloy pole rod base adopt electric contact type heating devices heat to 800 ~ 950 DEG C, be then rolled by flat-rolled pass, roll mill adopts two roller reversible milling trains, and pass deformation is 15% ~ 30%;
Step 3.2, excellent base step 3.1 obtained are rolled by 120 ° of edging passes, and roll mill adopts two roller reversible milling trains, and pass deformation is 15% ~ 30%, rolling temperature 800 ~ 950 DEG C;
Step 3.3, excellent base step 3.2 obtained first carry out pickling processes, and acid cleaning process needs constantly to stir, and pickling time is 1 ~ 2h; Again the excellent base after pickling is rolled pass by finished product to be rolled, roll mill adopts four-high reversing mill rolling, and 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, and hydraulic pressure is 5 ~ 40MPa, and aligning length is 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.
The beneficial effect of the milling method of a kind of TC6 titanium alloy six of the present invention square rod is, logical employing forges preparation technology, changes the turnning and milling technique that TC6 titanium alloy six square rod is traditional completely, thus greatly reduces raw-material use amount, reduce raw-material waste; By the rolling of multiple rolling groove, blank can be made to obtain finished product through the technological process more less than conventional method, thus enhance productivity, be applicable to large-scale production; Further, TC6 six square rod obtained by present invention process has the advantage that structural homogenity is good, stability is high, can be applied to the technical field with requirements at the higher level.
Accompanying drawing explanation
Fig. 1 is the hole type design figure of the milling method of a kind of TC6 titanium alloy six of the present invention square rod, wherein, Fig. 1 (a) is flat-rolled pass, and Fig. 1 (b) is edging pass, 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, and wherein, Fig. 2 (a) is flat-rolled pass, and Fig. 2 (b) is edging pass, and Fig. 2 (c) is 120 ° of edging passes, and Fig. 2 (d) is last groove;
Fig. 3 is through the obtained TC6 titanium alloy six square rod S14 micro-organization chart of the embodiment of the present invention 1;
Fig. 4 is the hole type design figure of the embodiment of the present invention 2, and wherein, Fig. 4 (a) is flat-rolled pass, and Fig. 4 (b) is 120 ° of edging passes, and Fig. 4 (c) is last groove;
Fig. 5 is through the obtained TC6 titanium alloy six square rod S22 micro-organization chart of the embodiment of the present invention 2.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The milling method of a kind of TC6 titanium alloy six of the present invention square rod, specifically comprises the following steps:
Step 1, choose rolling rod base:
Choose the TC6 titanium alloy pole rod base that structure property meets standard GB/T/T2965 requirement, excellent base surface roughness is not more than 3.2 μm, and excellent base specification size determines according to finished product and deflection 30% ~ 50%, and its chemical composition is in table 1;
Table 1TC6 titanium alloy pole rod base component list
Step 2, design rolling groove:
The rolling groove of TC6 titanium alloy pole rod base is designed to flat-rolled pass, edging pass, 120 ° of edging passes and finished product and rolls pass;
As shown in Fig. 1 (a), be flat-rolled pass, wherein R1 is 10 ~ 60mm, 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;
As shown in Fig. 1 (b), be edging pass, wherein R is 10 ~ 80mm, h=S+ (0.5 ~ 3.0) mm, b=S+ (3 ~ 6) mm, r1 and r2 is 1 ~ 4mm, α=60 ~ 90 °;
As shown in Fig. 1 (c), be 120 ° of edging passes, wherein α=(120 ± 2) °, r=2 ~ 4mm, b=S+ (3 ~+∝);
As shown in Fig. 1 (d), be last groove, wherein h=1/2 (S+ (0 ~ 0.5)), α=120 ~ (0 ~ 2) °, r=1 ~ 3mm.
Step 3, TC6 titanium alloy pole rod base the flat-rolled pass, edging pass, 120 ° of edging passes and the finished product that are designed by step 2 are successively rolled pass be rolled, obtain moulding stick base;
Step 3.1, by TC6 titanium alloy pole rod base adopt electric contact type heating devices heat to 800 ~ 950 DEG C, be then rolled by flat-rolled pass, roll mill adopts two roller reversible milling trains, and pass deformation is 15% ~ 30%;
Step 3.2, excellent base step 3.1 obtained are rolled by edging pass, and roll mill adopts two roller reversible milling trains, and pass deformation is 15% ~ 30%, rolling temperature 800 ~ 950 DEG C;
Step 3.3, excellent base step 3.2 obtained are rolled by edging pass, and roll mill adopts two roller reversible milling trains, and pass deformation is 15% ~ 30%, rolling temperature 800 ~ 950 DEG C;
Step 3.4, excellent base step 3.3 obtained first carry out pickling processes, and acid cleaning process needs constantly to stir, and pickling time is 1 ~ 2h; Again the excellent base after pickling is rolled pass by finished product to be rolled, roll mill adopts four-high reversing mill rolling, and pass deformation is 10% ~ 15%, and rolling temperature is not less than 680 DEG C;
Step 4, step 3 is obtained moulding stick base carry out electrical contact stretcher leveling process, straightening temperature is 800 ~ 950 DEG C, and 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 processed after moulding stick base be placed on atmospheric furnace and carry out air annealing in process, heat treatment temperature is 800 ~ 850 DEG C, heat treatment time is 1 ~ 2h, and Air flow is to room temperature;
Step 6, step 5 is processed after excellent base carry out crop and surface treatment, wherein, surface treatment adopts the mode of pickling after first sandblasting; 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, final obtained TC6 titanium alloy six square rod.
Embodiment 1
Preparation TC6 titanium alloy six square rod S14:
Choose the TC6 titanium alloy pole rod base that structure property meets standard GB/T/T2965 requirement, Φ 19.6mm, excellent base surface roughness 3.2 μm; The rolling groove of TC6 titanium alloy pole rod base is designed to flat-rolled pass, edging pass, 120 ° of edging passes and finished product and rolls pass, its hole type design as shown in Figure 2,
Fig. 2 (a) is flat-rolled pass: wherein R1 is 15mm, R2 is 20, h=6.7mm, b=18mm, r=3mm;
Fig. 2 (b) is edging pass, and wherein R is 20mm, h=10.8mm, b=21mm, r1 and r2 is 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.
TC6 titanium alloy pole rod base is adopted electric contact type heating devices heat to 800 DEG C, and be then rolled by flat-rolled pass, roll mill adopts two roller reversible milling trains, and pass deformation is 15%; Be rolled by edging pass by the excellent base obtained, roll mill adopts two roller reversible milling trains, and pass deformation is 15%, rolling temperature 800 DEG C; Be rolled by edging pass by the excellent base obtained, roll mill adopts two roller reversible milling trains, and pass deformation is 15%, rolling temperature 800 DEG C; The excellent base obtained first is carried out pickling processes, and acid cleaning process needs constantly to stir, and pickling time is 1h; Again the excellent base after pickling is rolled pass by finished product to be rolled, roll mill adopts four-high reversing mill rolling, and pass deformation is 10%, rolling temperature 680 DEG C; To obtain moulding stick base and carry out electrical contact stretcher leveling process, straightening temperature is 800 DEG C, and aligning electric current is 1000A, and hydraulic pressure is 5MPa, and aligning length is 1.5m; Moulding stick base after process is placed on atmospheric furnace and carries out air annealing in process, heat treatment temperature is 800 DEG C, heat treatment time is 1h, and Air flow is to room temperature; Excellent base after process is carried out crop and surface treatment, and wherein, surface treatment adopts the mode of pickling after first sandblasting, and 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; Final obtained TC6 titanium alloy six square rod.The properties of product adopting the present embodiment obtained detect in table 2, and microscopic structure metallograph is shown in Fig. 3, obtained TC6 titanium alloy six square rod uniform texture.
Table 2,TC6 six square rod S14 results of property
Embodiment 2
Preparation TC6 titanium alloy six square rod S22:
Choose the TC6 titanium alloy pole rod base that structure property meets standard GB/T/T2965 requirement, Φ 28mm, excellent base surface roughness 3 μm; The rolling groove of TC6 titanium alloy pole rod base is designed to flat-rolled pass, 120 ° of edging passes and finished product and rolls pass, its hole type design as shown in Figure 4,
Fig. 4 (a) is flat-rolled pass: wherein R1 is 45mm, R2 is 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.
TC6 titanium alloy pole rod base is adopted electric contact type heating devices heat to 900 DEG C, and be then rolled by flat-rolled pass, roll mill adopts two roller reversible milling trains, and pass deformation is 25%; Be rolled by 120 ° of edging passes by the excellent base obtained, roll mill adopts two roller reversible milling trains, and pass deformation is 25%, rolling temperature 900 DEG C; The excellent base obtained first is carried out pickling processes, and acid cleaning process needs constantly to stir, and pickling time is 1.5h; Again the excellent base after pickling is rolled pass by finished product to be rolled, roll mill adopts four-high reversing mill rolling, and pass deformation is 12%, rolling temperature 700 DEG C; To obtain moulding stick base and carry out electrical contact stretcher leveling process, straightening temperature is 900 DEG C, and aligning electric current is 2000A, and hydraulic pressure is 25MPa, and aligning length is 3m; Moulding stick base after process is placed on atmospheric furnace and carries out air annealing in process, heat treatment temperature is 830 DEG C, heat treatment time is 1.5h, and Air flow is to room temperature; Excellent base after process is carried out crop and surface treatment, wherein, surface treatment adopts the mode of pickling after first sandblasting, and pickle is the mixture of hydrofluoric acid, nitric acid and water, the percent by volume of hydrofluoric acid, nitric acid and water is 1:3:7, final obtained TC6 titanium alloy six square rod.The properties of product adopting the present embodiment obtained detect in table 3, and microscopic structure metallograph is shown in Fig. 5, obtained TC6 titanium alloy six square rod uniform texture.
Table 3TC6 titanium alloy six square rod S22 results of property
Embodiment 3
Preparation TC6 titanium alloy six square rod S14:
Choose the TC6 titanium alloy pole rod base that structure property meets standard GB/T/T2965 requirement, Φ 19.6mm, excellent base surface roughness 2.2 μm; The rolling groove of TC6 titanium alloy pole rod base is designed to flat-rolled pass, edging pass, 120 ° of edging passes and finished product and rolls pass, its hole type design is with embodiment 1, TC6 titanium alloy pole rod base is adopted electric contact type heating devices heat to 950 DEG C, then be rolled by flat-rolled pass, roll mill adopts two roller reversible milling trains, and pass deformation is 30%; Be rolled by edging pass by the excellent base obtained, roll mill adopts two roller reversible milling trains, and pass deformation is 30%, rolling temperature 950 DEG C; Be rolled by edging pass by the excellent base obtained, roll mill adopts two roller reversible milling trains, and pass deformation is 30%, rolling temperature 950 DEG C; The excellent base obtained first is carried out pickling processes, and acid cleaning process needs constantly to stir, and pickling time is 2h; Again the excellent base after pickling is rolled pass by finished product to be rolled, roll mill adopts four-high reversing mill rolling, and pass deformation is 15%, rolling temperature 720 DEG C; To obtain moulding stick base and carry out electrical contact stretcher leveling process, straightening temperature is 950 DEG C, and aligning electric current is 3000A, and hydraulic pressure is 40MPa, and aligning length is 4m; Moulding stick base after process is placed on atmospheric furnace and carries out air annealing in process, heat treatment temperature is 850 DEG C, heat treatment time is 2h, and Air flow is to room temperature; Excellent base after process is carried out crop and surface treatment, and wherein, surface treatment adopts the mode of pickling after first sandblasting, and 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; Final obtained TC6 titanium alloy six square rod.
Claims (8)
1. a milling method for TC6 titanium alloy six square rod, is characterized in that, specifically comprise the following steps:
Step 1, choose rolling rod base:
Choose the TC6 titanium alloy pole rod base that structure property meets standard GB/T/T2965 requirement, excellent base surface roughness is not more than 3.2 μm;
Step 2, design rolling groove:
The rolling groove of TC6 titanium alloy pole rod base is designed to flat-rolled pass, 120 ° of edging passes and finished product and rolls pass;
Step 3, TC6 titanium alloy pole rod base the flat-rolled pass, 120 ° of edging passes and the finished product that are designed by step 2 are successively rolled pass be rolled, obtain moulding stick base;
Step 4, step 3 is obtained moulding stick base carry out electrical contact stretcher leveling process;
Step 5, step 4 is processed after moulding stick base be placed on atmospheric furnace and carry out air annealing in process, Air flow is to room temperature;
Step 6, step 5 is processed after excellent base carry out crop and surface treatment, wherein, surface treatment adopts the mode of pickling after first sandblasting, final obtained TC6 titanium alloy six square rod.
2. the milling method of a kind of TC6 titanium alloy six square rod according to claim 1, is characterized in that, the rolling groove design in described step 2 also comprises edging pass design.
3. the milling method of a kind of TC6 titanium alloy six square rod according to claim 2, it is characterized in that, also comprise edging pass rolling process in described step 3, described edging pass rolling is between flat-rolled groove rolling and 120 ° of edging pass rollings.
4. the milling method of a kind of TC6 titanium alloy six square rod according to claim 3, it is characterized in that, the specific implementation method of described edging pass rolling process is: be rolled by edging pass by excellent base, roll mill adopts two roller reversible milling trains, pass deformation is 15% ~ 30%, rolling temperature 800 ~ 950 DEG C.
5. the milling method of a kind of TC6 titanium alloy six square rod according to any one of claim 1-4, it is characterized in that, the concrete implementation step of described step 3 is:
Step 3.1, by TC6 titanium alloy pole rod base adopt electric contact type heating devices heat to 800 ~ 950 DEG C, be then rolled by flat-rolled pass, roll mill adopts two roller reversible milling trains, and pass deformation is 15% ~ 30%;
Step 3.2, excellent base step 3.1 obtained are rolled by 120 ° of edging passes, and roll mill adopts two roller reversible milling trains, and pass deformation is 15% ~ 30%, rolling temperature 800 ~ 950 DEG C;
Step 3.3, excellent base step 3.2 obtained first carry out pickling processes, and acid cleaning process needs constantly to stir, and pickling time is 1 ~ 2h; Again the excellent base after pickling is rolled pass by finished product to be rolled, roll mill adopts four-high reversing mill rolling, and pass deformation is 10% ~ 15%, and rolling temperature is not less than 680 DEG C.
6. the milling method of a kind of TC6 titanium alloy six square rod according to claim 1, is characterized in that, in described step 4, straightening temperature is 800 ~ 950 DEG C, and aligning electric current is 1000 ~ 3000A, and hydraulic pressure is 5 ~ 40MPa, and aligning length is 1.5 ~ 4.0m.
7. the milling method of a kind of TC6 titanium alloy six square rod according to claim 1, is characterized in that, in described step 5, heat treatment temperature is 800 ~ 850 DEG C, heat treatment time is 1 ~ 2h.
8. the milling method of a kind of TC6 titanium alloy six square rod according to claim 1, is characterized in that, in described 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.
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| CN106363021A (en) * | 2016-08-30 | 2017-02-01 | 西部超导材料科技股份有限公司 | Rolling method for 1500MPa-grade titanium alloy bars |
| CN108817085A (en) * | 2018-06-14 | 2018-11-16 | 宝鸡市天罡钛业有限责任公司 | A kind of pass schedule and milling method rolling rectangular section titanium or titanium alloy profile |
| 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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| CN108817085A (en) * | 2018-06-14 | 2018-11-16 | 宝鸡市天罡钛业有限责任公司 | A kind of pass schedule and milling method rolling rectangular section titanium or titanium alloy profile |
| CN108817085B (en) * | 2018-06-14 | 2023-09-08 | 宝鸡市天罡钛业有限责任公司 | Pass system for rolling rectangular-section titanium and titanium alloy section and rolling method |
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| CN105251804B (en) | 2018-05-08 |
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Inventor after: Du Xiaolian Inventor after: Wang Yongzhe Inventor after: Dong Weixuan Inventor after: He Yonggang Inventor after: Li Jun Inventor after: Bai Jie Inventor after: Zhang Xiaoyuan Inventor after: Sun Feng Inventor after: Lei Jinwen Inventor after: He Yongsheng Inventor before: Du Xiaolian Inventor before: Wang Yongzhe Inventor before: Lai Yunjin Inventor before: Liu Xianghong Inventor before: Dong Weixuan Inventor before: He Yonggang Inventor before: Li Jun Inventor before: Bai Jie Inventor before: Zhang Xiaoyuan Inventor before: Sun Feng Inventor before: Lei Jinwen Inventor before: He Yongsheng |
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