हाल ही में , a टीम of रिसर्चर यांग शांगलू फ्रॉम शंघाई इंस्टीट्यूट ऑफ ऑप्टिक्स और प्रेसिजन मशीनरी (SIPM), चीनी अकादमी of साइंसेज (CAS), R&D center of लेजर इंटेलिजेंट मैन्युफैक्चरिंग टेक्नोलॉजी, has made new progress in लेजर वेल्डिंग of new स्ट्रक्चरल मैटेरियल्स फॉर हाई-टेम्परेचर पिघला हुआ साल्ट्स। for the first time, the टीम has atrue दोष-मुक्त वेल्डिंग of निकल-आधारित उच्च-तापमान मिश्र धातु a उच्च-शक्ति लेजर, और व्यवस्थित रूप से मूल्यांकन द माइक्रोस्ट्रक्चर और मैकेनिकल गुण of the वेल्डेड जोड़. शोध परिणाम प्रकाशित in the journal "Laser वेल्डिंग of GH3539 मिश्र धातु पिघला हुआ नमक रिएक्टर: प्रसंस्करण अनुकूलन, माइक्रोस्ट्रक्चर और मैकेनिकल 22. शोध परिणाम प्रकाशित इन सामग्री लक्षण वर्णन अंडर शीर्षक of 22लेजर वेल्डिंग of GH3539 मिश्र धातु for पिघला हुआ नमक रिएक्टर: प्रसंस्करण अनुकूलन, माइक्रोस्ट्रक्चर और मैकेनिकल गुण".
GH3539 alloy is a new type of high-temperature nickel-based alloy independently developed by China, which has excellent high-temperature mechanical and corrosion-resistant properties, and is suitable for ultra-high-temperature ( Greater than or equal to 850 degree ) molten salt environment. However, the higher alloying results in the alloy having a higher sensitivity to weld cracking. In order to achieve high efficiency and high quality laser welding of alloy structural components, the team used fiber laser welding technology to study the effect of different welding process parameters on the welding of 3mm plate thickness GH3539 alloy, through process optimization to inhibit the generation of weld cracks, porosity and other defects, for the first time to achieve the GH3539 alloy flawless weld shaping, on the basis of which the welded joints of the microstructure and room temperature / high temperature On this basis, the microstructure and room temperature/high temperature mechanical properties of the welded joints were systematically evaluated; and the tensile fracture behavior of the laser-welded joints was analyzed, which elucidated the fracture mode of the laser-welded joints. This work lays a foundation for promoting the development of laser welding technology of GH3539 nickel-based high-temperature alloy and the application of the alloy.
यह कार्य समर्थित द द यूथ फंड of the नेशन नेचुरल साइंस फाउंडेशन चाइना और द नेशनल कुंजी रिसर्च और डेवलपमेंट प्रोग्राम चाइना चीन द्वारा समर्थित था.
Figure 1: (a) Welded cross-section of GH3539 laser welded joints; (b) Microstructure of GH3539 alloy; (c) XRD results of GH3539 alloy laser welded joints; (d) Hardness distribution of GH3539 alloy laser welded joints; (e) Engineering stress-strain curves of the base material and welded joints at different temperatures; (f) Average stress-strain curves of the base material and welded joints at different temperatures. (f) Average elongation of base material and welded joints at different temperatures.