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1. :2000 - 03 - 06 : (970547) : , ,1972 , 1 1006 - 0456 (2000) 02 - 0011 - 05 ( , 510640) , 1 , , 1 , , TG 45615 A 1 21 , , , 1 1 1 , 1 , , ; , , 1 1 , 150 mm1 CV500 - 1 , 1 V , Q235 , TWE - 711 SQJ501 ( 1. 2 mm) , AWS A5. 20 E71T - 11 , CO2 , 1 1 1 , TSD - 340A 1 I/ A U/ V v/ mm s- 1 E/ kJ cm- 1 / mm 180 27 3. 0 16. 20 15 180 27 6. 0 8. 10 30 1 ; ; 1 22 2 2000 6 ( ) Journal of Nanchang University( Engineering & Technology) Vol. 22 No. 2 Jun. 2000
2. 2 1 , 1 1 , , , , 1 , , 6 9 mm 1 1 , , 1 , , 1 ( ) , 1 , 1 1 1 11 ;21 ;31 ; 41 ;51 ;61 , 400 1 , , , 1 ( 1 V B + V C ) , 1 , , ; , , , 1 , 14176 cm3 , T 25 mm1 3 311 2 1 , 1(a) , 5 V , 30 V , 0 , 1(b) , , 10 V , 30 V , 120 A , 1 , 2 1 , , 2 1 ( ) 2000
3. (a) (b) 2 2 / V / A / ms / Hz / % / % 20. 4 365 3. 92 60 21. 7 32 17. 8 408 5. 12 30 15. 4 0 , , 1 2 1 20. 4 V , 12 V 3 , 1 , 9 000 K , 1 , , , 1 , , , , , 1 , 100 A 1 , , , ; , , , 1 592 A , 1 , 1 : , , ; , , 1 , Si ,Mn 4 1 312 , , 1 , , , 1 3 1 2 :
4. 1d i/ d t , 9119 kA/ s , 4918 kA/ s. , 1 , , , , , , , 1 , , 1 10 4. 7 7. 5 4. 51 , , 1 , , , , 1 , 1 313 , , 5 , 31 , , , , Mn ,Si 1 , , , 1 Mn Si , C O , C 1 8416 % , , 28 ms , , Mn Si , , , , Mn Si 1 3 % C Si Mn S P TWE - 711 CO2 0. 025 0. 42 1. 30 0. 04 0. 03 0. 04 0. 25 1. 05 0. 012 0. 013 0. 04 0. 25 0. 79 0. 012 0. 017 , , , 1 , 1 , 1 ( 4 ) , , , , 1 1 , , , 1 314 5 V 1 , , 1 API 1104 ASME IX , 4 1 ( ) 2000
5. 4 ( 10 kg) - 2. 5 - 2. 0 - 1. 5 - 1. 0 - 0. 5 0 0. 5 1. 0 1. 5 2. 0 2. 5 TWE - 711 235 247 240 222 221 218 206 178 157 169 135 207 228 227 238 242 200 183 161 154 144 137 1 , , , , , 1 4 1) , 1 5 / MPa ( d = 3 a) ( - 20 ) / J / mL g- 1 SQJ501 440 ( ) 80 22 ,24 ,18 0. 404 430 ( ) 120 46 ,48 ,52 0. 135 2) , , 1 3) , , , , , 1 1 Brown A , Staub J A , Masubuchi K. Fundamental Study of Underwater Welding Z 1Offshore Technology Conference. Houston ,Texas ,1973. 2 , 1 C 1 : ,19821 3 , 1 M 1 1 : ,19851 4 Dring Peter Szelagowski. Underwater Welding - Influencing Quantities and Limiting Working Depths in Metal Arc Active Gas Welding and Manual Metal Arc Welding J . Welding and Cutting , 1991 , 43 (4) : 34 35. 5 1 M 1 : ,19961 Study on the Method of Underwater Flux - Cored Arc Welding Liu Sang Zhong Jiguang Zhang Tong Liao Xiao Wang Guorong ( Department of Mechatronic Engineering , South China University of Technology , Guangzhou 510640 , China) ABSTRACT This paper presents the contrast experiments of flux - cored arc welding by the methods of underwater wet and underwater mini drain water cap. The characteristic and mechanism of short circuiting process of underwater welding have been investigated. It was found that the sound weld can be obtained by this new designed cap in flux - cored wire underwater welding. KEY WORDS underwater welding ,flux - cored arc welding ,short circuiting process 5 1 2 :