Ultrasonic impact treatment method for reducing residual stress of titanium alloy thin plate welded structure

• Main Authors: ZHANG WENJING, LIU RUI, YU YANG, HUI SONGXIAO, SONG XIAOYUN, QIAN GUANGLU, YE WENJUN
• Format: Patent
• Language: Chinese; English
• Published: 03.07.2018
• Subjects: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to an ultrasonic impact treatment method for reducing the residual stress of a titanium alloy thin plate welded structure, belonging to the technical field of metal processing. The ultrasonic impact treatment method specifically comprises the following steps: (1) selecting an impact head: carrying out ultrasonic impact treatment on the titanium alloy thin plate welded structure, wherein the shape of the selected impact head is closely relevant with the shape of a welding joint according to a titanium alloy thin plate welding method, the width of a weld joint of the impacthead is narrow during vacuum electron beam welding, a tabular impact head is adopted, and the width of the impact head is 1.5mm-2.5mm; and (2) carrying out ultrasonic impact treatment process, wherein the impact manner is weld toe impact, the impact number of times is 2-4, the impact speed is 150mm/min-300mm/min. According to the ultrasonic impact treatment method, the targeted and selective treatment of the weld joint c