SU579341A1 - Method of manufacturing elongated articles and semifinished products from refractory metals - Google Patents

Method of manufacturing elongated articles and semifinished products from refractory metals

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Publication number
SU579341A1
SU579341A1 SU7602337427A SU2337427A SU579341A1 SU 579341 A1 SU579341 A1 SU 579341A1 SU 7602337427 A SU7602337427 A SU 7602337427A SU 2337427 A SU2337427 A SU 2337427A SU 579341 A1 SU579341 A1 SU 579341A1
Authority
SU
USSR - Soviet Union
Prior art keywords
refractory metals
semifinished products
elongated articles
manufacturing elongated
semi
Prior art date
Application number
SU7602337427A
Other languages
Russian (ru)
Inventor
Станислав Семенович Семилетов
Иван Иванович Корнилов
Леонид Сергеевич Косачев
Original Assignee
Предприятие П/Я А-1857
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Предприятие П/Я А-1857 filed Critical Предприятие П/Я А-1857
Priority to SU7602337427A priority Critical patent/SU579341A1/en
Application granted granted Critical
Publication of SU579341A1 publication Critical patent/SU579341A1/en

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Description

BOB. Однако дл  менее пластичных магериа лов, например сплавов вольфрама, его при мвненне резко снижает выход годного изза охрупчиванн  материалов при рекриста лизааин и разрушени  полуфабрнхатов на первых проходах прокатки после термообра боткн. Целью изобретени  $гел етс  снижение брака от разрушени  полуфабрикатов при ид деформировании. Дл  этого предлагаетс  способ,  о ко« торому полуфабрикаты подвергают много кратной теплой деформации с промежуточным рекристаллизационным отжигом только средней части полуфаориката, причем длину нетар мообработанных коноов выбира|рт рав ной 0,5-1 длины зоны пластической дефор мааии. Отличительным признаком способе  вл етс  проведение термообработки только средней части полуфабриката. Разрушение начи наетс  с конца прлуфаб. риката, когда он входит в зоту деформации По мере перемещени  зоны деформации раэ рушение распростран етс  практически на всю длину полуфабриката, В предложенном способе нетермообработанны е концы, благо. дар  сохранению деформироваинЫ структуры , обладают повышенны) пластичностью и эффективно преп тствуют началу развити  ра;зрушвнн . При м е р . CnocojS был реализован - при производстве воль мовых труб. Трубы прессовали, затем подвергали рекрнсталиэаии онному отжигу в вакууме при 1300-1560 С течение 1-5 мин. Нагрев груб осущеетвл ли пропусканием 9/юктрн еского токе. Кон цы i труб на длине 1О-15 мм. зажимали в медные водоохлаждаемые токоподводы, что обеспечило сохранение на концах нсходной деформир01ванной структуры. Затем трубы были подвергнуты четырехкратной прокатке. Практически был исключен брак по разрушению труб на первых проходах прокатки. Применение описанного способа позволило увеличить выход годного на операци х теплой прокатки на 30-35%. рмула изобретени  1. Способ изготовлени  длинномерных изделий И полуфабрикатов из тугоплавких металлов путем многократной деформации с промежуточным ракрисгеллизационным отжи- гом, .0 т   и ч а ю щ и и с .  тем, что, с целые снижени  брака от разрушени  по луфабрикатов при их двформааии, промажу точному отжигу пойвергайэт только среднюю часть полуфабрикатов. 2,. Способ по п, 1, отличающ и и с   тем, что рекрйстад изационный огжиг провод т на рассто нии от кра  полуфаб рнката равном OsS-l длины зоны пластическсй деформации. Источники информанйи, прин тые во внимание при экспертизе: 1. Пагент США М 3375695, кл, 72-365, 1968. 2. Па тан г США 3477271, , 1969. 3.Авторское свицегельстао СССР № 396130, кл. В 21 В З/ОО, 1973, 4.Унлкинсон. Получение тугоплавких металлов, Агомиздаг, .М., 1975 г. с. 315. 5.Патент США № 3324699, кл. 72-365, 1967,BOB. However, for less ductile materials, for example, tungsten alloys, it drastically reduces the yield during the course of embrittlement of materials with recristol-lizaain and the destruction of the semi-fabrhat in the first rolling passes after heat treatment. The aim of the invention is to reduce rejects from the destruction of semi-finished products during the deformation process. For this purpose, a method is proposed that semi-finished products are subjected to multiple warm deformations with intermediate recrystallization annealing of only the middle part of the semi-aoricate, with the length of a non-tared material equal to 0.5-1 of the length of the plastic deformation zone. A distinctive feature of the method is to conduct heat treatment only of the middle part of the semi-finished product. Destruction starts from the end of the prefab. ricata, when it enters the deformation zone. As the deformation zone moves, the destruction extends to almost the entire length of the semifinished product. In the proposed method, there is no heat-treated ends, good. The gift of preserving the deformed structure, possess enhanced plasticity and effectively prevents the beginning of development; An example. CnocojS was implemented - in the production of will tubes. The pipes were pressed, then they were subjected to rectification in annealing in vacuum at 1300–1560 ° C for 1–5 min. Heating is rough by passing 9 / second current. The ends of the i pipes at a length of 1–15 mm. they were clamped into water-cooled copper current leads, which ensured that the desiccant deformed structure was preserved at the ends. Then the tubes were rolled four times. Almost eliminated the marriage of the destruction of pipes in the first passes of rolling. The application of the described method has allowed an increase in the yield for warm rolling operations by 30–35%. The scope of the invention. 1. A method of manufacturing long products AND semi-finished products of refractory metals by repeated deformation with an intermediate Racrisal annealing, .0 tons and h. so that, with whole reductions in marriages from the destruction of intermediate products when they are twofold, only the middle part of the semifinished products will miss the exact annealing. 2 ,. The method according to claim 1, is also distinguished by the fact that the recrystad burning is carried out at a distance from the edge of the semi-fab equal to OsS-l of the length of the plastic deformation zone. Sources of information taken into account during the examination: 1. US Pat. No. 3375695, Cl. 72-365, 1968. 2. Pa. US Grad. 3477271, 1969. 3. Author's Setzgelstao USSR No. 396130, Cl. In 21 V Z / OO, 1973, 4. Unlkinson. Production of refractory metals, Agomizdag, M., 1975 315. 5. US patent number 3324699, cl. 72-365, 1967,

SU7602337427A 1976-03-22 1976-03-22 Method of manufacturing elongated articles and semifinished products from refractory metals SU579341A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU7602337427A SU579341A1 (en) 1976-03-22 1976-03-22 Method of manufacturing elongated articles and semifinished products from refractory metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU7602337427A SU579341A1 (en) 1976-03-22 1976-03-22 Method of manufacturing elongated articles and semifinished products from refractory metals

Publications (1)

Publication Number Publication Date
SU579341A1 true SU579341A1 (en) 1977-11-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU7602337427A SU579341A1 (en) 1976-03-22 1976-03-22 Method of manufacturing elongated articles and semifinished products from refractory metals

Country Status (1)

Country Link
SU (1) SU579341A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768365A (en) * 1987-11-23 1988-09-06 Gte Products Corporation Process for producing tungsten heavy alloy sheet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768365A (en) * 1987-11-23 1988-09-06 Gte Products Corporation Process for producing tungsten heavy alloy sheet

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