CN103526144A - TC17 titanium alloy large-scale bar free forging method - Google Patents

TC17 titanium alloy large-scale bar free forging method Download PDF

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CN103526144A
CN103526144A CN201310540276.4A CN201310540276A CN103526144A CN 103526144 A CN103526144 A CN 103526144A CN 201310540276 A CN201310540276 A CN 201310540276A CN 103526144 A CN103526144 A CN 103526144A
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forging
time
forged
fire
transformation temperature
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CN201310540276.4A
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CN103526144B (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

A TC17 titanium alloy large-scale bar free forging method specifically comprises the steps of cogging and forging, forging below a first phase transformation point, forging above the first phase transformation point, forging below a second phase transformation point, forging above the second phase transformation point and forging below a third phase transformation point. The TC17 titanium alloy large-scale bar free forging method uses high-low-high-low-high-low free forging process. TC17 alloy large-scale bar materials with the specification of phi 450-phi 550mm and with good performance and tissue can be manufactured by achieving reasonable collocation of three circulation process lines above the phase transformation points and under the phase transformation points, multiple heating number of free forging, forging water cooling and forging air cooling. Thus, the domestic production status that the currently-produced TC17 alloy large-scale bar materials cannot meet the requirements for excellent tissue and performance. By means of a diagonal line drawing method, deformation of bar materials in all directions, in the core portion and at the edge is more even.

Description

TC17 titanium alloy large size bar free forging method

Technical field

The present invention relates to titanium and its alloy work field, relate in particular 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 engine blower, pneumatic plant diskware and heavy in section forging of aircraft engine.

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

Summary of the invention

Deficiency for 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 forges: TC17 ingot formation Heating temperature is divided into front two fire time Heating temperatures more than transformation temperature 150 ℃~300 ℃, rear several fire time Heating temperature more than transformation temperature 50 ℃~100 ℃; TC17 titan alloy casting ingot, blank are carried out to the inferior upsetting pull of 3~6 fire and forge, every fire time forging ratio is controlled between 3.5~7.4, after time forging of the first two fire, adopts air cooling, and its ember all adopts water-cooled after forging;

(2), transformation temperature is forged below for the first time: Heating temperature below transformation temperature 20 ℃~80 ℃, blank is carried out to the inferior upsetting pull of 1~3 fire to be forged, during pulling, adopt the mode of diagonal lines pulling, every fire time forging ratio is controlled between 2.8~7.2, all takes water-cooled after forging;

(3), transformation temperature is forged above for the first time: Heating temperature more than transformation temperature 20 ℃~80 ℃, blank to be carried out to the upsetting pull of 1~2 fire time and forge, every fire time forging ratio is controlled between 2.8~7.2, all takes air cooling after forging;

(4), transformation temperature is forged below for the second time: Heating temperature below transformation temperature 20 ℃~80 ℃, blank is carried out to the inferior upsetting pull of 1~3 fire to be forged, during pulling, adopt the mode of diagonal lines pulling, every fire time forging ratio is controlled between 2.8~7.2, all takes air cooling after forging;

(5), transformation temperature is forged above for the second time: Heating temperature more than transformation temperature 20 ℃~80 ℃, blank to be carried out to the upsetting pull of 1~2 fire time and forge, every fire time forging ratio is controlled between 2.8~7.2, all takes air cooling after forging;

(6), transformation temperature is forged below for the third time: Heating temperature below transformation temperature 20 ℃~80 ℃, blank is carried out to the forgings of 4~12 fire time, when upsetting pull is forged, every fire time forging ratio is controlled between 2.0~7.0; When pulling is forged, every fire time forging ratio is controlled between 1.2~3.0, all takes 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 transformation temperature operational path above and three circulations below transformation temperature, after many fire time open die forgings 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, changed tissue that domestic current production is difficult to reach good and the production status of performance requriements TC17 alloy large scale rod bar.The large scale rod bar macrostructure that adopts " 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 in order to make bar at the distortion of all directions and core and limit portion uniformity more.The meaning of this manufacture method is at present domestic in the urgent need to titanium alloy forging a kind of large specification, 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 in any form the present invention.

Embodiment 1:

(1), cogging is forged: choose Φ 650 ingot castings, transformation temperature is 890 ℃; 1 fiery Forge Heating temperature is selected 1180 ℃, and two upsettings two are pulled out and forged the 680mm to, and forging ratio is 7.3, after forging, adopts air cooling; 2 fiery Forge Heating temperature are selected 1070 ℃, and two upsettings two are pulled out and forged the 680mm to, and forging ratio selects 7.2, after forging, adopt air cooling; 3 fiery Forge Heating temperature are selected 960 ℃, and two upsettings two are pulled out and forged the 670mm to, and forging ratio selects 7.2, after forging, adopt water-cooled;

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

(3), transformation temperature is forged above for the first time: 6 fiery Forge Heating temperature are selected 930 ℃, adopt two upsettings two to pull out and forge the 670mm to, and forging ratio all selects 7.0, after forging, adopt air cooling;

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

(5), transformation temperature is forged above for the second time: 9 fiery Forge Heating temperature are selected 930 ℃, adopt two upsettings two to pull out and forge the 660mm to, and forging ratio all selects 7.0, after forging, adopt air cooling;

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

Embodiment 2:

(1), cogging is forged: choose Φ 650 ingot castings, transformation temperature is 895 ℃.1 fiery Forge Heating temperature is selected 1150 ℃, and two upsettings two are pulled out and forged the 680mm to, and forging ratio is 7.2, after forging, adopts air cooling; 2 fiery Forge Heating temperature are selected 1070 ℃, and two upsettings two are pulled out and forged the 660mm to, and forging ratio selects 7.2, after forging, adopt air cooling; 3 fiery Forge Heating temperature are selected 980 ℃, and two upsettings two are pulled out and forged the 660mm to, and forging ratio selects 7.0, after forging, adopt water-cooled; 4 fiery Forge Heating temperature are selected 950 ℃, and two upsettings two are pulled out and forged the 660mm to, and forging ratio selects 7.0, after forging, adopt water-cooled;

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

(3), transformation temperature is forged above for the first time: 7 fiery Forge Heating temperature are selected 950 ℃, adopt two upsettings two to pull out and forge the 650mm to, and forging ratio all selects 7.0, after forging, adopt air cooling;

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

(5), transformation temperature is forged above for the second time: 9 fiery Forge Heating temperature are selected 930 ℃, adopt two upsettings two to pull out and forge the 640mm to, and forging ratio all selects 7.0, after forging, adopt air cooling;

(6), transformation temperature is forged below for the third time: 10~15 fiery Forge Heating temperature are selected 840 ℃~860 ℃, all adopt two upsettings two to pull out and forge the 640mm to, and forging ratio all selects 6.6; 16,17 fiery Forge Heating temperature are selected 840 ℃~860 ℃, and forging ratio selects respectively 1.82,1.32, 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, is characterized in that, concrete steps are as follows:
(1), cogging forges: TC17 ingot formation Heating temperature is divided into front two fire time Heating temperatures more than transformation temperature 150 ℃~300 ℃, rear several fire time Heating temperature more than transformation temperature 50 ℃~100 ℃; TC17 titan alloy casting ingot, blank are carried out to the inferior upsetting pull of 3~6 fire and forge, every fire time forging ratio is controlled between 3.5~7.4, after time forging of the first two fire, adopts air cooling, and its ember all adopts water-cooled after forging;
(2), transformation temperature is forged below for the first time: Heating temperature below transformation temperature 20 ℃~80 ℃, blank is carried out to the inferior upsetting pull of 1~3 fire to be forged, during pulling, adopt the mode of diagonal lines pulling, every fire time forging ratio is controlled between 2.8~7.2, all takes water-cooled after forging;
(3), transformation temperature is forged above for the first time: Heating temperature more than transformation temperature 20 ℃~80 ℃, blank to be carried out to the upsetting pull of 1~2 fire time and forge, every fire time forging ratio is controlled between 2.8~7.2, all takes air cooling after forging;
(4), transformation temperature is forged below for the second time: Heating temperature below transformation temperature 20 ℃~80 ℃, blank is carried out to the inferior upsetting pull of 1~3 fire to be forged, during pulling, adopt the mode of diagonal lines pulling, every fire time forging ratio is controlled between 2.8~7.2, all takes air cooling after forging;
(5), transformation temperature is forged above for the second time: Heating temperature more than transformation temperature 20 ℃~80 ℃, blank to be carried out to the upsetting pull of 1~2 fire time and forge, every fire time forging ratio is controlled between 2.8~7.2, all takes air cooling after forging;
(6), transformation temperature is forged below for the third time: Heating temperature below transformation temperature 20 ℃~80 ℃, blank is carried out to the forgings of 4~12 fire time, when upsetting pull is forged, every fire time forging ratio is controlled between 2.0~7.0; When pulling is forged, every fire time forging ratio is controlled between 1.2~3.0, all takes air cooling after forging, finally forms finished product.
CN201310540276.4A 2013-11-05 2013-11-05 TC17 titanium alloy large size bar free forging method CN103526144B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104226722A (en) * 2014-09-05 2014-12-24 湖南金天钛业科技有限公司 Machining method of TB3 bar for aerospace electric explosion valve
CN104625627A (en) * 2014-12-23 2015-05-20 西安欧中材料科技有限公司 Manufacturing method of titanium alloy electrode bar for plasma rotation electrode
CN104762576A (en) * 2015-04-24 2015-07-08 西北有色金属研究院 Method for manufacturing TC18 titanium alloy whole basket-weave microstructure medium-specification ultra-long bars
CN105583251A (en) * 2014-10-24 2016-05-18 中国科学院金属研究所 Forging method for large-size Inconel690 alloy 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
CN107326315A (en) * 2017-07-19 2017-11-07 湖南金天钛业科技有限公司 A kind of forging method for producing the big specification Ti1350 alloy bar materials of more than Φ 200mm
CN107350406A (en) * 2017-07-19 2017-11-17 湖南金天钛业科技有限公司 The free forging method of TC19 titanium alloy large size bars
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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CN101348876B (en) * 2008-09-10 2010-06-16 西北有色金属研究院 Low cost high strength titanium alloy
FR2946363B1 (en) * 2009-06-08 2011-05-27 Messier Dowty Sa Titanium alloy composition with high mechanical characteristics for the manufacture of high performance parts, particularly 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

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104226722A (en) * 2014-09-05 2014-12-24 湖南金天钛业科技有限公司 Machining method of TB3 bar for aerospace electric explosion valve
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
CN105583251A (en) * 2014-10-24 2016-05-18 中国科学院金属研究所 Forging method for large-size Inconel690 alloy bar
CN104625627A (en) * 2014-12-23 2015-05-20 西安欧中材料科技有限公司 Manufacturing method of titanium alloy electrode bar for plasma rotation electrode
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
CN104762576A (en) * 2015-04-24 2015-07-08 西北有色金属研究院 Method for manufacturing TC18 titanium alloy whole basket-weave microstructure medium-specification ultra-long bars
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
CN107326315A (en) * 2017-07-19 2017-11-07 湖南金天钛业科技有限公司 A kind of forging method for producing the big specification Ti1350 alloy bar materials of more than Φ 200mm
CN107350406A (en) * 2017-07-19 2017-11-17 湖南金天钛业科技有限公司 The free forging method of TC19 titanium alloy large size bars
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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