CN105483586B - A kind of forging method of raising TC18 titanium alloy structure properties - Google Patents

A kind of forging method of raising TC18 titanium alloy structure properties Download PDF

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Publication number
CN105483586B
CN105483586B CN201510924727.3A CN201510924727A CN105483586B CN 105483586 B CN105483586 B CN 105483586B CN 201510924727 A CN201510924727 A CN 201510924727A CN 105483586 B CN105483586 B CN 105483586B
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China
Prior art keywords
forging
temperature
titanium alloy
blank
tissue
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CN201510924727.3A
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Chinese (zh)
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CN105483586A (en
Inventor
姚彦军
郝宏斌
薛强
李增乐
李明
何力
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陕西宏远航空锻造有限责任公司
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    • 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08Upsetting

Abstract

The present invention relates to a kind of forging method of raising TC18 titanium alloy structure properties, belong to material processing field.The microscopic structure of TC18 titanium alloys is influenced by temperature sensitivity, when two-phase section is forged, and microscopic structure is made up of primary alpha phase and β phase in version tissues, and with the rise of forging temperature, primary alpha phase content tails off, size increase, isometric degree increase.If the soaking time and deformation amount controlling is proper obtains uniform basket tissue during quasi- β forging more than transformation temperature, although the tissue temperature-room type plasticity is not so good as equiaxed structure, but its intensity is high, high-temperature behavior, fracture toughness and fatigue behaviour are better than equiaxed structure, if but when being incubated more than transformation temperature long Widmannstatten structure tissue of obtaining relative to equiaxed structure, room temperature and elevated temperature strength increase, stretching plastic reduction, room temperature impact reduction.The forging method of the present invention, is allowed to while high intensity, high-ductility and high-fracture toughness is obtained, improve the tissue reliability of TC18 titanium alloy members.

Description

A kind of forging method of raising TC18 titanium alloy structure properties

Technical field

The present invention relates to a kind of forging method of raising TC18 titanium alloy structure properties, the titanium alloy processed has high-strength The good basket shape tissue of degree, high tenacity, high-ductility and quenching degree, belongs to material processing field.

Background technology

TC18 is a kind of titanium alloy of high-alloying, and its nominal composition is Ti-5Al-5Mo-5V-1Fe, T beta transus temperatures area Between be 870 DEG C~880 DEG C.The alloy has the advantages that high intensity, high-ductility, quenching degree is good, solderability is good, thus widely should For the fuselage and the large-scale load-carrying construction part of undercarriage of aircraft, while the alloy can be also used at 350 DEG C~400 DEG C of manufacture The part of long-term work.TC18 is generally used in an annealed state, can also be used under as-quenched.The heating and change of forging The control of shape process is the difficult point of material production, has important influence to interior tissue and performance.Some data are discussed Influence of the conventional forging temperature to TC18 titanium alloys tissue and performance, but it is less to TC18 quasi- β forging researchs.

TC18 titanium alloys are when 3t flat-die hammers are produced, shadow of the forging and molding to alloy structure performance at a temperature of quasi- β forgings Result is rung to show:Microscopic structure is influenced by temperature sensitivity, and when two-phase section is forged, microscopic structure is by primary alpha phase and β phase in version Tissue composition, with the rise of forging temperature, primary alpha phase content tails off, size increase, isometric degree increase.More than transformation temperature If soaking time and deformation amount controlling is proper obtains uniform basket tissue during quasi- β forging, although the tissue temperature-room type plasticity is not Such as equiaxed structure, but its intensity is high, and high-temperature behavior, fracture toughness and fatigue behaviour are better than equiaxed structure, if but in transformation temperature The long Widmannstatten structure tissue that can obtain is relative to equiaxed structure, room temperature and elevated temperature strength increase, stretching plastic when being incubated above Reduction, room temperature impact reduction, therefore in DEFORMATION POINTS blank soaking time control it is most important.Forging is the inside group to forging Knit the critical process that there is material impact with performance.How to be accurately controlled in and forged under beta transus temperature and it is obtained expected group Knit be TC18 titanium alloy quasi-betas forging key issue.

The content of the invention

The technical problems to be solved by the invention are:A kind of forging method of raising TC18 titanium alloy structure properties is provided, It is allowed to while high intensity, high-ductility and high-fracture toughness is obtained, improve the tissue reliability of TC18 titanium alloy members.

A kind of technical scheme that the present invention takes, forging method of raising TC18 titanium alloy structure properties, this method includes Following steps:

(1) forging is changed under titanium alloy blank transformation temperature

It is T β-(45 DEG C~30 DEG C) to change forging temperature, and heating coefficient is 0.5~0.8min/mm, after insulation to setting time, The upsetting pull on flat-die hammer of coming out of the stove immediately changes forging, while temperature control, deflection is 20%~30%, makes blank close to compact dimensions, It is upset ratio 1 per work step upsetting pull deflection:(2~2.5), are pulled out than (1.5~2):1;

(2) defect detecting test of base in the middle of;

(3) quasi- β forging moldings in transformation temperature

Forging preheating temperature be T β-(45 DEG C~30 DEG C), heating coefficient be 0.5~0.8min/mm, forging temperature be T β+ (10 DEG C~15 DEG C), are incubated 20~30min, and forging deformation amount is 15%~20%, and forging time is less than 2min;When blank is shifted Between be less than or equal to 20 seconds;

(4) it is heat-treated

Blank is placed in 810~840 DEG C of holding furnace, heating coefficient is 1.5~2min/mm, cools to 750 with the furnace ~760 DEG C, heating coefficient is 1.5-2min/mm, air cooling of coming out of the stove, and is placed in 610~640 DEG C of holding furnace, and heating coefficient is 3min/mm, air cooling of coming out of the stove;

(5) 100% carry out low power inspection, flaw detection and sampling high power inspection and mechanical property inspection.

Further, change in forging step, under 3t flat-die hammers, weight is 20Kg~40Kg blank, point 2~4 fire are completed.

Further, in forging step, Control for Kiln Temperature uses thermocouple temperature measurement, carries out feedback control.

Further, in forging and forging step is changed, 200 DEG C~300 DEG C of preheating is carried out to frock and using instrument.

The beneficial effects of the invention are as follows:A kind of forging side of higher TC18 titanium alloys structure property can obtain by the present invention Method, is allowed to the expected requirement that reaches of intensity, plasticity and fracture toughness, improves the tissue reliability of TC18 titanium alloy members.

Embodiment

A kind of forging method of raising TC18 titanium alloy structure properties, carries out α to titanium alloy blank firstIt is isometricAlpha region changes Forging, quasi- β phases are then carried out to blank and forge (being the forging method more than a kind of transformation temperature heated), are finally carried out at quasi- β phases heat Reason, makes it preliminarily form a kind of tiny intensive basket texture, in last quasi- β phases heat treatment process, crystal grain after forging Grow up and limited by substantial amounts of dislocation in the basket texture and deformation process of crisscross intertexture, only the tiny sheet in β crystal grain αTurnCombination is mutually rearranged, forming core grows up to form new fine and closely woven texture under the driving of a large amount of dislocation energies, and grain boundaries are by tiny point Dissipate interrupted αTurnMutually formed, greatly improve the integrated performance index of TC18 titanium alloys.

Embodiment one

1.1 raw material

(1) raw material chemical composition is rechecked by standard GB/T4698, as a result to be qualified;

(2) raw material mechanical property is rechecked by standard YMS1507, as a result to be qualified, as shown in table 1;

(3) raw material macrostructure:Without clear brilliant, metallurgical imperfection, standard are had no:GB/T5168.

The raw material mechanical property of table 1

(4) raw material mirco structure:Organized for uniform isometric α, standard:GB/T5168;

(5) raw material are detected a flaw:By the flat-bottom holes of Φ 2.0, as a result qualified, standard:A levels in YMS1507;

(6) raw material KIC:Normal data:>=55, actual measurement:59.5~58.6, as a result qualified, standard:YMS1507.

1.2 forgings, heat treatment, machine add and checked

(1) because raw material microscopic structure is than more uniform, β -30 DEG C of bases of T 160 × 160 × 180 under transformation temperature, then use Quasi- β forgings, make its interior tissue be changed into required basket tissue;

(2) quasi- β forging temperatures are forged by (β -30 DEG C of T)+(+15 DEG C of T β), and work step is 160 × 160 × 180 forgings to 130 ± 3 × 190 ± 3 × 180 ± 3 (180 are former grain direction), 1 fire is completed;

(3) blank is placed by heat treatment in 830 DEG C of holding furnace, insulation 260mm, is cooled to 750 DEG C with the furnace, is incubated and is 260min, comes out of the stove and is air-cooled to normal temperature, reenters stove and is incubated 390mm in 620 DEG C of holding furnace, comes out of the stove and be air-cooled to normal temperature;

(4) detect a flaw, detected a flaw by the A levels forging 100% in YMS1508 standards after machine adds, conclusion is qualified;

(5) physics and chemistry presses 4GS-250-2011, and forging mechanical property is shown in Table 2, KIC and is shown in Table 3, hydrogen analysis in table 4, has no metallurgical Defect.

The forging room-temperature mechanical property of table 2

The forging KIC of table 3

Standard Actual measurement 1 Actual measurement 2 Conclusion ≥60 77.1 72.7 It is qualified

The forging hydrogen of table 4 is analyzed

Standard Actual measurement Conclusion ≤0.015 0.0015 It is qualified

Claims (4)

1. a kind of forging method of raising TC18 titanium alloy structure properties, it is characterised in that this method comprises the following steps:
(1) forging is changed under titanium alloy blank transformation temperature
It is T β-(45 DEG C~30 DEG C) to change forging temperature, and heating coefficient is 0.5~0.8min/mm, after insulation to setting time, immediately The upsetting pull on flat-die hammer of coming out of the stove changes forging, while temperature control, deflection is 20%~30%, makes blank close to compact dimensions, per work It is upset ratio 1 to walk upsetting pull deflection:(2~2.5), are pulled out than (1.5~2):1;
(2) defect detecting test of base in the middle of;
(3) quasi- β forging moldings in transformation temperature
Forging preheating temperature is T β-(45 DEG C~30 DEG C), and heating coefficient is 0.5~0.8min/mm, and forging temperature is T β+(10 DEG C ~15 DEG C), 20~30min is incubated, forging deformation amount is 15%~20%, and forging time is less than 2min;Blank transfer time is small In equal to 20 seconds;
(4) it is heat-treated
Blank is placed in 810~840 DEG C of holding furnace, heating coefficient is 1.5~2min/mm, cool to 750 with the furnace~ 760 DEG C, heating coefficient is 1.5-2min/mm, air cooling of coming out of the stove, and is placed in 610~640 DEG C of holding furnace, and heating coefficient is 3min/mm, air cooling of coming out of the stove;
(5) 100% carry out low power inspection, flaw detection and sampling high power inspection and mechanical property inspection.
2. forging method according to claim 1, it is characterised in that:Change in forging step, under 3t flat-die hammers, weight is 20Kg~40Kg blank, point 2~4 fire are completed.
3. forging method according to claim 1, it is characterised in that:Forge in step, Control for Kiln Temperature is surveyed using thermocouple Temperature, carries out feedback control.
4. forging method according to claim 1, it is characterised in that:In forging and forging step is changed, to frock and use Instrument carries out 200 DEG C~300 DEG C of preheating.
CN201510924727.3A 2015-12-11 2015-12-11 A kind of forging method of raising TC18 titanium alloy structure properties CN105483586B (en)

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CN106591754A (en) * 2016-12-12 2017-04-26 陕西宏远航空锻造有限责任公司 Forging method using flat-die hammer to improve structure property of TC21 titanium alloy
CN106694770A (en) * 2016-12-15 2017-05-24 陕西宏远航空锻造有限责任公司 Forging method of TC21 titanium alloy
CN106694772B (en) * 2016-12-15 2019-05-21 陕西宏远航空锻造有限责任公司 A kind of aero-engine forges the forging method of axle journal forging with TC17 alloy β
CN109261865A (en) * 2018-09-29 2019-01-25 西安飞机工业(集团)有限责任公司 A kind of quasi- β forging deformation control method of TC18 titanium alloy die forging part
CN109865787B (en) * 2019-02-15 2020-09-29 湖南金天钛业科技有限公司 Forging method for obtaining uniform basket structure TC18 forge piece
CN110814250A (en) * 2019-11-13 2020-02-21 中国航发动力股份有限公司 Forming method of disc-shaped forging
CN111118424A (en) * 2020-02-27 2020-05-08 无锡派克新材料科技股份有限公司 Titanium alloy shaping method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101838785A (en) * 2010-06-01 2010-09-22 中国航空工业集团公司北京航空材料研究院 Post weld vacuum heat treatment process of TC18 titanium alloy welding component
CN102517530A (en) * 2011-12-16 2012-06-27 陕西宏远航空锻造有限责任公司 Hot working method for improving structure property of Ti5553 titanium alloy
CN102641978A (en) * 2012-05-17 2012-08-22 湖南金天钛业科技有限公司 Method for processing TC18 titanium alloy large-sized section bar

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012174501A1 (en) * 2011-06-17 2012-12-20 Titanium Metals Corporation Method for the manufacture of alpha-beta ti-al-v-mo-fe alloy sheets

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101838785A (en) * 2010-06-01 2010-09-22 中国航空工业集团公司北京航空材料研究院 Post weld vacuum heat treatment process of TC18 titanium alloy welding component
CN102517530A (en) * 2011-12-16 2012-06-27 陕西宏远航空锻造有限责任公司 Hot working method for improving structure property of Ti5553 titanium alloy
CN102641978A (en) * 2012-05-17 2012-08-22 湖南金天钛业科技有限公司 Method for processing TC18 titanium alloy large-sized section bar

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