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Information × Registration Number 0210U000694, 0107U005228 , R & D reports Title Titanium alloys goods resource Increase, in particular welded, by forming regulated structure and the hardening level of nearsurface layers popup.stage_title Head Fedirko Victor, Registration Date 10-03-2010 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 In the research the influence of under annealing technological factors (temperature, composition of gas environment: air, vacuum) and subsequent treatment (upclassing etching) on the fatigue life's at low-cycle pure bending conditions and slow destruction at static extension of thin-sheet weld-fabricated (by automatic argon-arc welding) connections of VT1-0 and PT7M titanium alloys was investigated. The aim of this work is to formulate technological recommendations for optimization of parameters of annealing for providing of high level of fatigue properties of the weld-fabricated connections. On the basis of the got experimental dates, jointly with the department of main metallurgist of ANTONOV Aeronautical Scientific/Technical Complex, developed and on the Antonov ASTC applied in industry "technology of a vacuum heat treatment of the weld-fabricated details from the monophase VT1-0 and PT7M titanium alloys" and technological instruction of RTI 622-09 "Vacuum heat treatment of the weld-fabricated details from the monophase VT1-0 and PT7M titanium alloys". Offered technology: intended for the increase of the operating resource of the weld-fabricated details from thin-sheet alpha-titanium alloys (the high-resource weld-fabricated titanium pipelines of the anti-icing system and system of preparation and conditioning of air); based on regulation temperature-time and gas-dynamic properties of a vacuum environment (residual pressure of 1.3 - 133 mPa, inleakage of air of not more than 26 uPa/s) and allowable parameters of gas-saturated layers (the allowable gasing level of surface layers of metal are specified); enabled to increase on 20...30% fatigue characteristics of the weld-fabricated connections of VT1-0 and PT7M titanium alloys and the reduce their liability to brittle fracture by comparison to annealing on air and next upclassing etching; can be used as a final technological operation. Adaptation of schemas and heat treatment modes' for the Antonov ASTC vacuum thermal equipments was conducted (vacuum furnaces of SEV-5.5/11,5; SSHV 8.12/13, SNVE of 1.3.1/16-М), the method of determination of temperature-time relationship and gas-dynamic parameters of vacuum under annealing of the weld-fabricated details from the monophase VT1-0 and PT7M titanium alloys was offered. Product Description popup.authors Лопушанський Василь Антонович Лук'яненко Олександр Геннадійович Пічугін Анатолій Тимофійовмич Труш Василь Степанович popup.nrat_date 2020-04-02 Close