CN103526144B - TC17 titanium alloy large size bar free forging method - Google Patents

TC17 titanium alloy large size bar free forging method Download PDF

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Publication number
CN103526144B
CN103526144B CN201310540276.4A CN201310540276A CN103526144B CN 103526144 B CN103526144 B CN 103526144B CN 201310540276 A CN201310540276 A CN 201310540276A CN 103526144 B CN103526144 B CN 103526144B
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forging
transformation temperature
time
fire
forge
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CN201310540276.4A
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CN103526144A (en
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朱雪峰
杨胜
王博
余日成
黄艳华
陈艳
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湖南金天钛业科技有限公司
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Abstract

TC17 titanium alloy large size bar free forging method, concrete steps comprise cogging forging, first time transformation temperature below forging, first time transformation temperature more than forging, second time transformation temperature below forging, second time transformation temperature more than forging, third time transformation temperature below forge; The present invention adopts " high-low-high-low-Gao-low " open die forging technique, by realizing the operational path of below more than transformation temperature and transformation temperature three circulation, after time open die forging of many fire and forging, water-cooled and air cooling is reasonably combined, produce the TC17 alloy large scale rod bar of performance and highly organized Φ 450 ~ Φ 550mm specification, change domestic current production and be difficult to reach the production status that excellent structure and properties requires TC17 alloy large scale rod bar.Adopting the mode of diagonal lines pulling, is to make bar at the distortion uniformity more of all directions and core and edge.

Description

TC17 titanium alloy large size bar free forging method

Technical field

The present invention relates to titanium and its alloy work field, particularly relate to a kind of TC17 titanium alloy large size bar free forging method.

Background technology

TC17 alloy nominal composition is Ti-5Al-2Sn-2Zr-4Cr-4Mo, is the nearly β type diphasic titanium alloy of a kind of high-strength, high-ductility and high-hardenability, is mainly used in the parts such as the engine blower of aircraft engine, pneumatic plant diskware and heavy in section forging.

Along with the develop rapidly of China's Aviation Industry, TC17 titanium alloy consumption sharply increases, and also significantly improves the requirement of quality product, and particularly the standard-required of dual-use aircraft engine to titanium alloy component is more and more higher.This technology, for the application demand of aircraft industry to TC17 titanium alloy large size bar, is carried out the research of Φ 450 ~ Φ 550mm bar open die forging processing technology, is realized the large-scale production of TC17 titanium alloy large size bar, meet the needs of Aviation Industry.

Summary of the invention

For the deficiency of above-mentioned technology, the object of this invention is to provide a kind of TC17 titanium alloy large size bar free forging method, produce the large scale rod bar that diameter is Φ 450 ~ Φ 550mm, for alpha+beta two-phase structure, and homogeneity of structure is good, mechanical property is higher and highly stable, is applicable to suitability for industrialized production.

Technical scheme of the present invention is: TC17 titanium alloy large size bar free forging method, and its concrete steps are as follows:

(1), cogging forging: TC17 ingot formation Heating temperature is divided into front two fire time Heating temperatures more than transformation temperature 150 DEG C ~ 300 DEG C, rear a few fire time Heating temperature more than transformation temperature 50 DEG C ~ 100 DEG C; Carry out the secondary upsetting pull forging of 3 ~ 6 fire to TC17 titan alloy casting ingot, blank, every fire time forging ratio controls between 3.5 ~ 7.4, adopts air cooling, all adopt water-cooled after time forging of its ember after the first two fiery forging;

(2), forge below first time transformation temperature: Heating temperature below transformation temperature 20 DEG C ~ 80 DEG C, the secondary upsetting pull forging of 1 ~ 3 fire is carried out to blank, adopt the mode of diagonal lines pulling during pulling, every fire time forging ratio controls, between 2.8 ~ 7.2, all to take water-cooled after forging;

(3), more than first time transformation temperature forge: Heating temperature more than transformation temperature 20 DEG C ~ 80 DEG C, blank is carried out to the upsetting pull forging of 1 ~ 2 fire time, every fire time forging ratio controls, between 2.8 ~ 7.2, all to take air cooling after forging;

(4), forge below second time transformation temperature: Heating temperature below transformation temperature 20 DEG C ~ 80 DEG C, the secondary upsetting pull forging of 1 ~ 3 fire is carried out to blank, adopt the mode of diagonal lines pulling during pulling, every fire time forging ratio controls, between 2.8 ~ 7.2, all to take air cooling after forging;

(5), more than second time transformation temperature forge: Heating temperature more than transformation temperature 20 DEG C ~ 80 DEG C, blank is carried out to the upsetting pull forging of 1 ~ 2 fire time, every fire time forging ratio controls, between 2.8 ~ 7.2, all to take air cooling after forging;

(6), forge below third time transformation temperature: Heating temperature below transformation temperature 20 DEG C ~ 80 DEG C, blank is carried out to the forgings of 4 ~ 12 fire time, during upsetting pull forging, every fire time forging ratio controls between 2.0 ~ 7.0; During pulling forging, every fire time forging ratio controls, between 1.2 ~ 3.0, all to take air cooling after forging, finally forms finished product.

Compared with prior art, the present invention has following beneficial effect:

The present invention adopts " high-low-high-low-Gao-low " open die forging technique, by realizing the operational path of below more than transformation temperature and transformation temperature three circulation, after time open die forging of many fire and forging, water-cooled and air cooling is reasonably combined, produce the TC17 alloy large scale rod bar of performance and highly organized Φ 450 ~ Φ 550mm specification, change domestic current production and be difficult to reach the production status that excellent structure and properties requires TC17 alloy large scale rod bar.The large scale rod bar macrostructure adopting " high-low-high-low-Gao-low " open die forging technique to make is fuzzy crystalline substance, and microstructure is evenly tiny, and α organizes abundant isometry and is evenly distributed.Adopting the mode of diagonal lines pulling, is to make bar at the distortion uniformity more of all directions and core and edge.The meaning of this manufacture method be at present domestic in the urgent need to a kind of large gauge, titanium alloy forging that homogeneity of structure is good, and the alloy bar material that the inventive method is produced can meet above requirement.

Embodiment

The following examples can illustrate in greater detail the present invention, but do not limit the present invention in any form.

Embodiment 1:

(1), cogging forging: choose Φ 650 ingot casting, transformation temperature is 890 DEG C; 1 fiery Forge Heating thermal creep stress 1180 DEG C, two upsettings two pull out forging to 680mm, and forging ratio is 7.3, adopts air cooling after forging; 2 fiery Forge Heating thermal creep stress 1070 DEG C, two upsettings two pull out forging to 680mm, and forging ratio selects 7.2, adopts air cooling after forging; 3 fiery Forge Heating thermal creep stress 960 DEG C, two upsettings two pull out forging to 670mm, and forging ratio selects 7.2, adopts water-cooled after forging;

(2), forge below first time transformation temperature: 4 ~ 5 fiery Forge Heating temperature all select 860 DEG C, and adopt two upsettings two to pull out forging to 670mm, adopt the mode of diagonal lines pulling during pulling, forging ratio all selects 7.0, adopts water-cooled after forging;

(3), first time transformation temperature more than forge: 6 fiery Forge Heating thermal creep stress 930 DEG C, adopt two upsettings two pull out forging to 670mm, forging ratio all selects 7.0, adopts air cooling after forging;

(4), forge below second time transformation temperature: 7 ~ 8 fiery Forge Heating temperature all select 860 DEG C, and adopt two upsettings two to pull out forging to 660mm, adopt the mode of diagonal lines pulling during pulling, forging ratio all selects 7.0, adopts air cooling after forging;

(5), second time transformation temperature more than forge: 9 fiery Forge Heating thermal creep stress 930 DEG C, adopt two upsettings two pull out forging to 660mm, forging ratio all selects 7.0, adopts air cooling after forging;

(6), third time transformation temperature below forge: 10 ~ 16 fiery Forge Heating thermal creep stress 830 DEG C ~ 860 DEG C, all adopt two upsettings two pull out forging to 660mm, forging ratio all selects 6.5; 17,18 fiery Forge Heating thermal creep stress 830 DEG C ~ 850 DEG C, forging ratio selects 1.85,1.35 respectively, and final finished specification is Φ 520mm, and the type of cooling of above forging all adopts air cooling.

Embodiment 2:

(1), cogging forging: choose Φ 650 ingot casting, transformation temperature is 895 DEG C.1 fiery Forge Heating thermal creep stress 1150 DEG C, two upsettings two pull out forging to 680mm, and forging ratio is 7.2, adopts air cooling after forging; 2 fiery Forge Heating thermal creep stress 1070 DEG C, two upsettings two pull out forging to 660mm, and forging ratio selects 7.2, adopts air cooling after forging; 3 fiery Forge Heating thermal creep stress 980 DEG C, two upsettings two pull out forging to 660mm, and forging ratio selects 7.0, adopts water-cooled after forging; 4 fiery Forge Heating thermal creep stress 950 DEG C, two upsettings two pull out forging to 660mm, and forging ratio selects 7.0, adopts water-cooled after forging;

(2), forge below first time transformation temperature: 5,6 fiery Forge Heating temperature all select 860 DEG C, and all adopt two upsettings two to pull out forging to 650mm, adopt the mode of diagonal lines pulling during pulling, forging ratio all selects 7.0, all adopts water-cooled after forging;

(3), first time transformation temperature more than forge: 7 fiery Forge Heating thermal creep stress 950 DEG C, adopt two upsettings two pull out forging to 650mm, forging ratio all selects 7.0, adopts air cooling after forging;

(4), forge below second time transformation temperature: 8 fiery Forge Heating temperature all select 860 DEG C, and adopt two upsettings two to pull out forging to 650mm, adopt the mode of diagonal lines pulling during pulling, forging ratio all selects 7.0, all adopts air cooling after forging;

(5), second time transformation temperature more than forge: 9 fiery Forge Heating thermal creep stress 930 DEG C, adopt two upsettings two pull out forging to 640mm, forging ratio all selects 7.0, adopts air cooling after forging;

(6), third time transformation temperature below forge: 10 ~ 15 fiery Forge Heating thermal creep stress 840 DEG C ~ 860 DEG C, all adopt two upsettings two pull out forging to 640mm, forging ratio all selects 6.6; 16,17 fiery Forge Heating thermal creep stress 840 DEG C ~ 860 DEG C, forging ratio selects 1.82,1.32 respectively, and final finished specification is Φ 500mm, and the type of cooling of above forging all adopts air cooling.

Claims (1)

1.TC17 titanium alloy large size bar free forging method, it is characterized in that, concrete steps are as follows:
(1), cogging forging: TC17 ingot formation Heating temperature is divided into front two fire time Heating temperatures more than transformation temperature 150 DEG C ~ 300 DEG C, rear a few fire time Heating temperature more than transformation temperature 50 DEG C ~ 100 DEG C; Carry out the secondary upsetting pull forging of 3 ~ 6 fire to TC17 titan alloy casting ingot, blank, every fire time forging ratio controls between 3.5 ~ 7.4, adopts air cooling, all adopt water-cooled after time forging of its ember after the first two fiery forging;
(2), forge below first time transformation temperature: Heating temperature below transformation temperature 20 DEG C ~ 80 DEG C, the secondary upsetting pull forging of 1 ~ 3 fire is carried out to blank, adopt the mode of diagonal lines pulling during pulling, every fire time forging ratio controls, between 2.8 ~ 7.2, all to take water-cooled after forging;
(3), more than first time transformation temperature forge: Heating temperature more than transformation temperature 20 DEG C ~ 80 DEG C, blank is carried out to the upsetting pull forging of 1 ~ 2 fire time, every fire time forging ratio controls, between 2.8 ~ 7.2, all to take air cooling after forging;
(4), forge below second time transformation temperature: Heating temperature below transformation temperature 20 DEG C ~ 80 DEG C, the secondary upsetting pull forging of 1 ~ 3 fire is carried out to blank, adopt the mode of diagonal lines pulling during pulling, every fire time forging ratio controls, between 2.8 ~ 7.2, all to take air cooling after forging;
(5), more than second time transformation temperature forge: Heating temperature more than transformation temperature 20 DEG C ~ 80 DEG C, blank is carried out to the upsetting pull forging of 1 ~ 2 fire time, every fire time forging ratio controls, between 2.8 ~ 7.2, all to take air cooling after forging;
(6), forge below third time transformation temperature: Heating temperature below transformation temperature 20 DEG C ~ 80 DEG C, blank is carried out to the forgings of 4 ~ 12 fire time, during upsetting pull forging, every fire time forging ratio controls between 2.0 ~ 7.0; During pulling forging, every fire time forging ratio controls, between 1.2 ~ 3.0, all to take air cooling after forging, finally forms finished product; Diameter of phi 450 ~ Φ 550mm of large scale rod bar is alpha+beta two-phase structure.
CN201310540276.4A 2013-11-05 2013-11-05 TC17 titanium alloy large size bar free forging method CN103526144B (en)

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Publication number Priority date Publication date Assignee Title
CN104226722B (en) * 2014-09-05 2016-01-27 湖南金天钛业科技有限公司 A kind of space flight electric blasting valve TB3 bar processing method
CN105583251B (en) * 2014-10-24 2017-11-10 中国科学院金属研究所 A kind of forging method of big specification Inconel690 alloy bar materials
CN104625627B (en) * 2014-12-23 2016-11-16 西安欧中材料科技有限公司 A kind of preparation method of plasma rotating electrode titanium alloy electrode rod
CN104762576B (en) * 2015-04-24 2016-10-12 西北有色金属研究院 The preparation method of TC18 titanium alloy the whole network basket tissue medium format overlength bar
CN107214207A (en) * 2017-05-22 2017-09-29 西部超导材料科技股份有限公司 A kind of processing method of high uniform beta titanium alloy bar
CN107326315B (en) * 2017-07-19 2019-01-04 湖南金天钛业科技有限公司 A kind of forging method producing the big specification Ti1350 alloy bar material of Φ 200mm or more
CN107350406B (en) * 2017-07-19 2018-11-27 湖南金天钛业科技有限公司 The free forging method of TC19 titanium alloy large size bar
CN109226621A (en) * 2018-10-24 2019-01-18 湖南金天钛业科技有限公司 A kind of forging method of larger ratio of height to diameter titan alloy casting ingot

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CN101348876A (en) * 2008-09-10 2009-01-21 西北有色金属研究院 Low cost high strength titanium alloy
CN102477502A (en) * 2010-11-30 2012-05-30 西安赛特金属材料开发有限公司 Medical high-strength titanium alloy wire and preparation method thereof
CN102482735A (en) * 2009-06-08 2012-05-30 梅西耶-布加蒂-道提公司 Titanium alloy composition for the production of high-performance parts, in particular for the aeronautical industry

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101348876A (en) * 2008-09-10 2009-01-21 西北有色金属研究院 Low cost high strength titanium alloy
CN102482735A (en) * 2009-06-08 2012-05-30 梅西耶-布加蒂-道提公司 Titanium alloy composition for the production of high-performance parts, in particular for the aeronautical industry
CN102477502A (en) * 2010-11-30 2012-05-30 西安赛特金属材料开发有限公司 Medical high-strength titanium alloy wire and preparation method thereof

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