| LI Mei-yan,XUE Xi-xin,ZHANG Qi,SONG Li-xin,HAN Bin,LIU Ming-lei.Research Progress of Ultrasonic Impact Treatment for Welded Joint and Metal Surface[J],51(6):89-99 |
| Research Progress of Ultrasonic Impact Treatment for Welded Joint and Metal Surface |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.06.009 |
| KeyWord:ultrasonic impact treatment welded joint high entropy alloys surface modification |
| Author | Institution |
| LI Mei-yan |
School of Materials Science and Engineering, China University of Petroleum East China, Shandong Qingdao , China |
| XUE Xi-xin |
School of Materials Science and Engineering, China University of Petroleum East China, Shandong Qingdao , China |
| ZHANG Qi |
School of Materials Science and Engineering, China University of Petroleum East China, Shandong Qingdao , China |
| SONG Li-xin |
Offshore Oil Engineering Qingdao Co., Ltd., Shandong Qingdao , China |
| HAN Bin |
School of Materials Science and Engineering, China University of Petroleum East China, Shandong Qingdao , China |
| LIU Ming-lei |
China Petroleum Pipeline Engineering Co., Ltd., Hebei Langfang , China |
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| Abstract: |
| In engineering fields the construction machinery parts and the welded structures usually fail in practice due to surface wear, corrosion phenomenon and fatigue fracture phenomenon during their services, which makes a large amount of lost in industry production. It has been shown that the failure mechanism of metal surfaces is closely related to surface processing quality, stress distribution status and surface properties, and so on. As we know, ultrasonic impact treatment is a kind of surface strengthening technology, in which ultrasonic vibration are generated with a ultrasonic generator to drive the impact needle to impact the surface of work-piece at high speed, resulting in obvious plastic deformation as well as the generation of residual compressive stress. In addition, this technology possesses many advantages, such as high efficiency, high machining accuracy and wide machining range. In this paper, the research status and progress of ultrasonic impact treatment technology applied in welding joint treatment, surface strengthening of metal materials, laser cladding-ultrasonic impact composite treatment technology and ultrasonic impact-chemical treatment composite strengthening technology were summarized in general. On this basis, the change trend of residual stress distribution, mechanical properties and fatigue resistance of Al, Mg alloys and welded joints of alloy steels by ultrasonic impact treatment were summarized. In addition, the changes in the microstructures, substructures (such as dislocations, twins, and so on) and surface properties of traditional metal materials as well as new types of high entropy alloys after ultrasonic impact treatment were reviewed. Furthermore, the influence of ultrasonic impact treatment on microstructures and surface properties of laser surface modified layers was summarized and the effect of ultrasonic impact pre-treatment on the formation and surface properties of ion nitriding layer and ion sulphurizing layer was discussed. The results showed that ultrasonic impact treatment significantly reduced the residual tensile stress of the welded joints, effectively improved their fatigue strength, brought out nano-structures on the surfaces of metal and coatings, and significantly improved the surface hardness, wear resistance and corrosion resistance as well as high temperature resistance, so as to prolong the service life of engineering components. Obviously, the combination of ultrasonic impact treatment technology and surface coating technology provided a new idea for surface strengthening of engineering parts. For the surface strengthened layers, ultrasonic impact treatment was able to improve the surface properties dramatically on the premise of taking into account its plasticity and toughness, and bring out higher surface quality, better corrosion resistance and wear resistance. It was widely used in the fields of strengthening, repairing and re-manufacturing of key engineering parts in the engineering fields. Additionally, after ultrasonic impact treatment the refined structures in the ultrasonic impacted layer as well as a large number of microstructures provided more and more diffusion channels for subsequent chemical treatment, which played a positive role in promoting chemical treatment. Finally, the application prospect of ultrasonic impact treatment technology in engineering structural parts was prospected and the development direction of this technology was pointed in this article, all of which provided a reference for its popularization and application. |
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