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SU197804A1 - METHOD OF REMOVING WELDING STRESS - Google Patents

METHOD OF REMOVING WELDING STRESS

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Publication number
SU197804A1
SU197804A1SU1088677ASU1088677ASU197804A1SU 197804 A1SU197804 A1SU 197804A1SU 1088677 ASU1088677 ASU 1088677ASU 1088677 ASU1088677 ASU 1088677ASU 197804 A1SU197804 A1SU 197804A1
Authority
SU
USSR - Soviet Union
Prior art keywords
welding stress
weld
removing welding
metal
transition
Prior art date
Application number
SU1088677A
Other languages
Russian (ru)
Original Assignee
А. Е. Аснис , Г. А. Иващенко Институт электросварки Е. О. Патона
Publication of SU197804A1publicationCriticalpatent/SU197804A1/en

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Translated fromRussian

Известен термопластический способ сн ти  напр жений, при котором зоны, расположеиные по обеим сторонам от шва, нагревают передвигающимис  газовыми горелками на небольшом участке по длине шва до температуры 180-200°С дл  создани  пластических деформаций в области шва.A thermoplastic stress relieving method is known, in which zones located on both sides of the seam are heated by moving gas burners in a small area along the seam to a temperature of 180-200 ° C to create plastic deformations in the seam area.

Предлагаемый способ сн ти  сварочных напр жений отличаетс  от известного тем, что участок перехода от шва к основному металлу нагревают до температуры плавлени  металла . Этот способ позвол ет уменьшить деформации при механической обработке и последуюш ,ей эксплуатации сварных соединений и повысить усталостную прочность сварных соединений и стойкость против хрупкого разрушени .The proposed method of removing welding stresses differs from the known one in that the transition from the weld to the base metal is heated to the melting point of the metal. This method allows to reduce deformations during machining and subsequent operation of welded joints and to increase the fatigue strength of welded joints and resistance to brittle fracture.

Способ сн ти  сварочных напр жений основан па том, что при расплавлении участка перехода от шва к основному металлу неплав ш ,имс  электродом в защитной среде аргона в околощовной зоне нарушаетс  равновесие внутренних сил напр женного пол  в результате перехода части металла щва в пластическое состо ние. При этом снижаетс  уровень сварочных напр жений и уменьшаетс  вли ние концентратора напр жений.The method of removing welding stresses is based on the fact that when the transition section from the weld to the base metal is melted, the non-melting electrode with the protective medium of argon in the surroundings zone disrupts the balance of the internal forces of the stressed floor as a result of the transition of the part of the weld metal to plastic. This reduces the level of welding voltages and decreases the effect of the stress concentrator.

При наложении дополнительных щвов и расплавлении иебольшого количества основного металла и металла шва вследствие нагрева , начина  с температуры оОО°С, пределWhen imposing additional schv and melting and a small amount of base metal and weld metal due to heating, starting with temperature ООО ° С, the limit

текучести понижаетс , а при 600°С становитс  равным нулю. При этом сварочные напр жени  резко снижаютс . Естественно, что при кристаллизации дополнительных швов будут вновь возникать напр жени , однако они очень малы, так как количество расплавленного металла в ноперечном сечении во много раз меньше сечени  основного шва. Одновременно обеспечиваетс  плавный переход от ме0 талла шва к основному металлу.flow rate decreases, and at 600 ° C becomes zero. In so doing, the welding voltages are sharply reduced. Naturally, stresses will reappear during the crystallization of additional seams, but they are very small, since the amount of molten metal in the cross section is many times smaller than the cross section of the main seam. At the same time, there is a smooth transition from the weld metal to the base metal.

Расплавление границ шва выполн етс  электрической дугой неилав щимс  электродом в защитном газе во всех пространственных положени х.The melting of the weld edges is carried out by an electric arc by a non-filable electrode in shielding gas in all spatial positions.

5five

Описываемый способ позвол ет снизить сварочные нанр жени  на 35-409/о и тем самым в большей мере сохранить точность первоначальных размеров конструкции при механической обработке, повысить их стойкость 0 против хрупкого разрушени  и значительно повысить усталостную прочность сварных соединений .The described method makes it possible to reduce welding nanowires by 35-409 / o and thus to a greater extent preserve the accuracy of the original dimensions of the structure during machining, increase their resistance to brittle fracture and significantly increase the fatigue strength of welded joints.

Предмет изобретени Subject invention

5 Способ сн ти  сварочных напр жений, при котором нагревают участок перехода от шва к основному металлу, отличающийс  тем, что, с целью повышени  стойкости против хрупкого разрушеин  и усталостной прочно5 A method for relieving welding stresses, at which the transition zone from the weld to the base metal is heated, characterized in that, in order to increase resistance to brittle fracture and fatigue strength

SU1088677A METHOD OF REMOVING WELDING STRESSSU197804A1 (en)

Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4484570A (en)*1980-05-281984-11-27Synthes Ltd.Device comprising an implant and screws for fastening said implant to a bone, and a device for connecting two separated pieces of bone
US4776329A (en)*1985-09-201988-10-11Richards Medical CompanyResorbable compressing screw and method
US4973333A (en)*1985-09-201990-11-27Richards Medical CompanyResorbable compressing screw and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US4484570A (en)*1980-05-281984-11-27Synthes Ltd.Device comprising an implant and screws for fastening said implant to a bone, and a device for connecting two separated pieces of bone
US4776329A (en)*1985-09-201988-10-11Richards Medical CompanyResorbable compressing screw and method
US4973333A (en)*1985-09-201990-11-27Richards Medical CompanyResorbable compressing screw and method

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