CN103522007B - Method for manufacturing TC25 titanium alloy ring piece - Google Patents

Method for manufacturing TC25 titanium alloy ring piece Download PDF

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Publication number
CN103522007B
CN103522007B CN201310444804.6A CN201310444804A CN103522007B CN 103522007 B CN103522007 B CN 103522007B CN 201310444804 A CN201310444804 A CN 201310444804A CN 103522007 B CN103522007 B CN 103522007B
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forging
temperature
titanium alloy
size
hole
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CN201310444804.6A
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Chinese (zh)
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CN103522007A (en
Inventor
宋捷
罗鸿飞
项春花
陆远贵
叶小军
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贵州航宇科技发展股份有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23POTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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

The invention discloses a method for manufacturing a TC25 titanium alloy ring piece. A TC25 titanium alloy pre-rolled compact is heated to the deformation temperature of 30-50 DEG C below a phase transformation point, upsetting is carried out to enable the TC25 titanium alloy pre-rolled compact to be deformed by 50%-60% to obtain a solid cylinder, punching is carried out on the solid cylinder to enable the size of the inner diameter of the hole of the solid cylinder to be 60%-70% of the size of the outer diameter of the hole of the solid cylinder, a hollow cylinder is obtained, then mandrel supporter hole broadening is carried out, the size of the inner diameter of the hole of the hollow cylinder is made to be 70%-75% of the size of the outer diameter of the hole, a final forging temperature>=850 DEG C, the hollow cylinder is melted down when the hollow cylinder is hot, and heat preservation time is halved as is calculated with an actual thickness of 6min/10mm. Final rolling is carried out, the size of the inner diameter of the hole of the hollow cylinder is made to be 85%-90% of the size of the outer diameter of the hole, and a final rolling temperature >=850 DEG C. At last, double annealing processing is carried out, and the TC25 titanium alloy ring piece is obtained. The reasonable deformation temperature is adopted, and forging is facilitated. Air cooling is adopted after the forging, cooling is accelerated, the cooling process of air cooling is adopted in the double annealing process, and the mechanical performance of a forge piece is greatly improved.

Description

A kind of tc25 titanium alloy ring manufacture method

Technical field

The present invention relates to a kind of tc25 titanium alloy ring manufacture method.

Background technology

Tc25 titanium alloy is a kind of alpha+beta two facies pattern thermal strength titanium alloy of high comprehensive performance, and nominal composition is ti-6.5al- 2zr-2sn-2mo-1w-0.2si, when being suitable for long at 500~550 DEG C work, can be processed into forging, forging part, bar and its The product of its form.Due to the room-temperature property of this material, elevated temperature strength, croop property, heat stability, fatigue behaviour and fracture Preferably, properties are excellent, are therefore mainly used in aero-engine for the coupling such as toughness.

Tc25 compares with other titanium alloys, and advantage is that work reaches 500 DEG C~550 DEG C using temperature, works below 500 DEG C Time reaches 6000h, and below 550 DEG C, the working time reaches 3000h, is also one of material of first-selection of electromotor.Just because of this The requirement to performance for this material forging is just much higher than other titanium alloy performance requirements on electromotor, particularly 500 DEG C high drawing property The requirement of standard can be extremely difficult to.

According to traditional production technology, tc25 forging adopts the Technology for Heating Processing of double annealing, and annealing adopts air cooling.But Often low according to conventionally produced its tensile strength of tc25 forging out, even if disclosure satisfy that domestic current specification will Ask, majority be also walk offline.

The method for rolling and shaping of the tc25 titanium alloy thin wall ring as described in Chinese patent zl201010582171.1, is first The servo-actuated die sleeve set of pre- for the titanium alloy being heated to deformation temperature strip plate and preheating is put into machine for rolling ring, servo-actuated die sleeve is enclosed in pre- In strip plate, by the home roll of machine for rolling ring, core roller, armful roller and upper and lower cone roller, moving model and pre- strip plate are positioned;Restart and roll Ring machine, by its core roller radially towards home roll direction make feed motion and together with home roll the roll-force with 200kn~4000kn exist The pre- strip plate of roll off under the support of servo-actuated die sleeve so as to the speed of 5mm/s~10mm/s radially broadening, wall thickness is gradually reduced, Its deflection is become thin-walled ring by roll off after reaching 25%~45%.The program disclose roll off during roll off dynamics, speed With the deflection of pre- strip plate, and the minimum wall thickness (MINI W.) design and calculation method of servo-actuated die sleeve, and for the temperature model in forging process Enclose, the type of cooling and Technology for Heating Processing not specified (NS).

Content of the invention

It is an object of the invention to provide a kind of tc25 titanium alloy ring manufacture method, solve tc25 titanium alloy forging and resist Tensile strength is low, the 500 DEG C high problems drawing the difficult alignment request up to standard of performance.

A kind of tc25 titanium alloy ring manufacture method, mainly comprises the steps that

(1) blanking of pre- strip plate, heating, jumping-up, punching:

The heating pre- strip plate of tc25 titanium alloy 30~50 DEG C of deformation temperature under transformation temperature, 6min/10mm, make it through jumping-up Deformation 50%~60% obtains solid cylinder, obtains after solid cylinder punching being made the 60%~70% of its in the hole footpath a size of outside dimension To hollow cylinder, jumping-up and punching complete for a fire, forge temperature >=850 DEG C eventually;

(2) saddle support reaming:

Hollow cylinder described in step (1) is made the 70%~75% of its in the hole footpath a size of outside dimension through saddle support reaming, Final forging temperature >=850 DEG C, melt down while hot, and the time is pressed actual (real) thickness and calculated with 6min/10mm, and temperature retention time halves;

(3) finish to gauge:

Step (2) gained forging is made the 85%~90% of its in the hole footpath a size of outside dimension through finish to gauge, final forging temperature >= 850℃;

(4) double annealing, air-cooled:

Gained forging in step (3) is carried out double annealing process after finish to gauge, annealing is at 955~965 DEG C for the first time Lower insulation 110~130min, air-cooled, second annealing is insulation 5.5~6.5h, air cooling at 545~555 DEG C, obtains tc25 Titanium alloy ring.

Immediately forging is placed on the enterprising sector-style of autocratic equipment cold after the completion of finish to gauge in described step (3).

Described wall thickness in≤30mm about forging, deformation temperature is 30~50 DEG C under transformation temperature;Wall thickness is in 30~51mm Forging, deformation temperature is 30~40 DEG C under transformation temperature.

Beneficial effects of the present invention: using rational deformation temperature, be conducive to forging;Using air-cooled after forging, accelerate cold But, adopt air-cooled cooling treatment technique in double annealing, substantially increase the mechanical performance of forging.Wall thickness is on≤30mm a left side Right forging, within the scope of 30~50 DEG C under transformation temperature of deformation temperature, air-cooled just can meet requirement;Wall thickness is 30~51mm's Forging, within the scope of 30~40 DEG C under transformation temperature of deformation temperature;The double annealing of heat treatment is rationally effective, ties after testing Fruit display property indices all meet the requirements.It is that a point high and low temperature heats twice that double annealing is processed, and all takes after heating twice The heat treatment of air cooling;Heating makes alloy recrystallize for 30~60 DEG C below point transition point for the first time, and metastable phase is completely molten Solution;Second heating makes metastable phase decompose.

Brief description

Fig. 1 is the flow chart of the present invention.

Specific embodiment

The method for rolling and shaping implementing tc25 titanium alloy ring of the present invention needs forge furnace, forcing press, rolls ring The equipment such as machine, mechanical hand.

The chemical composition of tc25 titanium alloy is: al=6.2%~7.2%, mo=1.5%~2.5%, zr=0.8%~2.5%, sn= 0.8%~2.5%, w=0.5%~1.5%, si=0.1~0.25, fe≤0.15%, c≤0.1%, o≤0.15%, n≤0.04, h≤ 0.012%, cu≤0.1%, cr≤0.1%, remaining is ti.

As shown in figure 1, flow process of the present invention includes pre- for tc25 titanium alloy strip plate blanking, heating, jumping-up, punching, saddle support expands Hole, finish to gauge, double annealing, air-cooled.Below so that specification is for the tc25 titanium alloy blank of ф 220 × 250 as a example, describe this in detail Bright specific embodiment.

(1) blanking of pre- strip plate, heating, jumping-up, punching:

The pre- strip plate of tc25 titanium alloy that specification is ф 220 × 250 is taken to be heated in forge furnace 40 DEG C under transformation temperature Deformation temperature, 6min/10mm, rounding r20, on forging press, jumping-up makes it deform 54% to obtain solid cylinder, jumping-up to h= 135mm, drift a size of ф 150, obtain open circles after solid cylinder punching is made its in the hole footpath a size of outside dimension 68% Post, jumping-up and punching complete for a fire, final forging temperature >=850 DEG C.

(2) saddle support reaming:

Hollow cylinder described in step (1) is carried out saddle support reaming makes the 71.8% of its in the hole footpath a size of outside dimension, hole Footpath be ф 280mm, external diameter be ф 390mm, h=130mm, final forging temperature >=850 DEG C, melt down while hot, the time press actual (real) thickness with 6min/10mm calculates, and temperature retention time halves;

The computational methods of described deflection are: deflection=[(pre- 10 ° of longitudinal section area-thin-walled rings along centrage of strip plate 10 ° of longitudinal section areas along centrage of part)/pre- 10 ° of longitudinal section areas along centrage of strip plate] × 100%.

(3) finish to gauge:

Step (2) gained forging is made the 88% of its in the hole footpath a size of outside dimension through finish to gauge, aperture is ф 520mm, outward Footpath is ф 590mm, h=130mm, final forging temperature >=850 DEG C, air-cooled process immediately after the completion of rolling;

(4) double annealing, air-cooled:

Step (3) gained forging is carried out double annealing process after finish to gauge, annealing for the first time is insulation at 960 DEG C 120min, air-cooled, second annealing is insulation 6h, air cooling at 550 DEG C, obtains tc25 titanium alloy ring.

According to gb/t228 " metal material tensile testing at ambient temperature ", gb/t229 " metal Charpy notch impact test side Method ", gb6395 " metallic high temperature stretch duration running method " detection, the properties of the present invention made tc25 titanium alloy ring are such as Under:

(1) room is drawn

Performance is drawn in table 1 Room

(2) 500 DEG C high are drawn

2 500 DEG C of table is high to draw performance

(3) 550 DEG C high are drawn

3 550 DEG C of table is high to draw performance

(4) thermally-stabilised

Table 4 thermal stability

(5) low power: 3~7 grades of standard.

(6) high power: 2~9 grades of standard.

By the tc25 titanium alloy ring tool that be can be seen that with the result of upper table 1~table 4 using the inventive method roll off molding There are excellent interior tissue and performance, fully met the use requirement of tc25 alloy forged piece.

Tc25 titanium alloy ring is manufactured using the method that the present invention provides and is not limited to above-mentioned embodiment, for different walls Thick pre- strip plate, its deformation temperature is different;Wall thickness in≤30mm about forging, deformation temperature 30~50 DEG C of models under transformation temperature Within enclosing, air-cooled just can meet requirement;Wall thickness in the forging of 30~51mm, deformation temperature under transformation temperature 30~40 DEG C of scopes it Interior.

Embodiment 1

(1) blanking of pre- strip plate, heating, jumping-up, punching:

The heating pre- strip plate of tc25 titanium alloy, to the deformation temperature of lower 30 DEG C of transformation temperature, 6min/10mm, makes it deform through jumping-up 50% obtains solid cylinder, obtains hollow cylinder, upsetting after solid cylinder punching is made its in the hole footpath a size of outside dimension 60% Thick and punching completes for a fire, forges temperature >=850 DEG C eventually;

(2) saddle support reaming:

Hollow cylinder described in step (1) is made the 70% of its in the hole footpath a size of outside dimension through saddle support reaming, finish-forging temperature >=850 DEG C of degree, melts down while hot, and the time is pressed actual (real) thickness and calculated with 6min/10mm, and temperature retention time halves;

(3) finish to gauge:

Step (2) gained forging is made the 85% of its in the hole footpath a size of outside dimension through finish to gauge, final forging temperature >=850 DEG C;

(4) double annealing, air-cooled:

Gained forging in step (3) is carried out double annealing process after finish to gauge, annealing for the first time is to be incubated at 955 times 110, air-cooled, second annealing is in 545 times insulations 5.5, air cooling, obtains tc25 titanium alloy ring.

Embodiment 2

(1) blanking of pre- strip plate, heating, jumping-up, punching:

The heating pre- strip plate of tc25 titanium alloy, to the deformation temperature of lower 50 DEG C of transformation temperature, 6min/10mm, makes it deform through jumping-up 60% obtains solid cylinder, obtains hollow cylinder, upsetting after solid cylinder punching is made its in the hole footpath a size of outside dimension 70% Thick and punching completes for a fire, forges temperature >=850 DEG C eventually;

(2) saddle support reaming:

Hollow cylinder described in step (1) is made the 75% of its in the hole footpath a size of outside dimension through saddle support reaming, finish-forging temperature >=850 DEG C of degree, melts down while hot, and the time is pressed actual (real) thickness and calculated with 6min/10mm, and temperature retention time halves;

(3) finish to gauge:

Step (2) gained forging is made the 90% of its in the hole footpath a size of outside dimension through finish to gauge, final forging temperature >=850 DEG C;

(4) double annealing, air-cooled:

Gained forging in step (3) is carried out double annealing process after finish to gauge, annealing for the first time is insulation at 965 DEG C 130min, air-cooled, second annealing is insulation 6.5h, air cooling at 555 DEG C, obtains tc25 titanium alloy ring.

Embodiment 3

(1) blanking of pre- strip plate, heating, jumping-up, punching:

The heating pre- strip plate of tc25 titanium alloy, to the deformation temperature of lower 50 DEG C of transformation temperature, 6min/10mm, makes it deform through jumping-up 60% obtains solid cylinder, obtains hollow cylinder, upsetting after solid cylinder punching is made its in the hole footpath a size of outside dimension 70% Thick and punching completes for a fire, forges temperature >=850 DEG C eventually;

(2) saddle support reaming:

Hollow cylinder described in step (1) is made the 72.5% of its in the hole footpath a size of outside dimension through saddle support reaming, finish-forging Temperature >=850 DEG C, melt down while hot, and the time is pressed actual (real) thickness and calculated with 6min/10mm, and temperature retention time halves;

(3) finish to gauge:

Step (2) gained forging is made the 87.5% of its in the hole footpath a size of outside dimension through finish to gauge, final forging temperature >=850 ℃;

(4) double annealing, air-cooled:

Gained forging in step (3) is carried out double annealing process after finish to gauge, annealing for the first time is insulation at 960 DEG C 120min, air-cooled, second annealing is insulation 6h, air cooling at 550 DEG C, obtains tc25 titanium alloy ring.

Claims (1)

1. a kind of tc25 titanium alloy ring manufacture method it is characterised in that: using rational deformation temperature, be conducive to forge;Adopt With air-cooled after forging, accelerate cooling, adopt air-cooled cooling treatment technique in double annealing;Double annealing process point is high and low Temperature heats twice, and heating for the first time makes alloy recrystallize for 30~60 DEG C below point transition point, and metastable phase melts completely; Second heating makes metastable phase decompose;
Mainly comprise the steps that
(1) blanking of pre- strip plate, heating, jumping-up, punching:
The heating pre- strip plate of tc25 titanium alloy 30~50 DEG C of deformation temperature under transformation temperature, 6min/10mm, so that it is deformed through jumping-up 50%~60% obtains solid cylinder, obtains after solid cylinder punching being made the 60%~70% of its in the hole footpath a size of outside dimension To hollow cylinder, jumping-up and punching complete for a fire, forge temperature eventually and are 850 DEG C;
(2) saddle support reaming:
Hollow cylinder described in step (1) is made the 70%~75% of its in the hole footpath a size of outside dimension through saddle support reaming, eventually Forging temperature is 850 DEG C, melts down while hot, and the time is pressed actual (real) thickness and calculated with 6min/10mm, and temperature retention time halves;
(3) finish to gauge:
Step (2) gained forging is made the 85%~90% of its in the hole footpath a size of outside dimension through finish to gauge, final forging temperature is 850 ℃;
(4) double annealing:
Gained forging in step (3) is carried out double annealing process after finish to gauge, annealing for the first time is to protect at 955~965 DEG C Warm 110~130min, air-cooled, second annealing is insulation 5.5~6.5h, air cooling at 545~555 DEG C, obtains tc25 titanium and closes Golden ring;
Immediately forging is placed on the enterprising sector-style of autocratic equipment cold after the completion of finish to gauge in described step (3);
< forging of 30mm, deformation temperature is 30~50 DEG C under transformation temperature for wall thickness;Wall thickness is in the forging of 30~51mm, deformation temperature 30~40 DEG C under transformation temperature.
CN201310444804.6A 2013-09-26 2013-09-26 Method for manufacturing TC25 titanium alloy ring piece CN103522007B (en)

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Denomination of invention: A kind of TC25 titanium alloy ring manufacture method

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