【正文】 1 中英文資料外文翻譯文獻(xiàn) Head processing technology process operation Our factory mon welding methods are: manual welding, argon arc welding, submerged arc welding. (1) manual welding is mainly used for carbon steel 36mm plate welding. (2) submerged arc welding to more than 8mm carbon steel stainless steel sheet welding mainly. (3)36mm stainless steel argon arc welding with welding mainly. Commonly used stainless steel wire ER304and ER316L steel wire, monly used to J422and J507and J426and J427lowtemperature welding consumables. Flux of carbon steel used is the HJ431, stainless steel monly used is HJ260,. As a result of welding wire flux can be easily affected with damp, stored in the infrared drying machine, flux HJ431and HJ260drying temperature is 250300℃ . Welding wire J422and J350drying temperature were 150℃ and 300 ℃ Welding process is pletely in accordance with the welding execution, sheet thickness determines the welding to welding or double sided arc welding in welding, after the weld seam inspection ( RT X ray ) judgment without pores, cracks and other defects, such as found in the above deficiencies, to the repair, until the filming. welding operation standard (1) welding procedure card after receiving process, affirm the process 2 card and physical material, quantity, unit number, specifications, size instruction number is consistent, whether there is debris around the wafer, wafer splashes whether clean removal, such as treatment is not clean, will use the grinding clean. (2) there is no welding test plate, groove cutting quality can meet the requirement, material surface without obvious defects, such as abnormal response. (3) according to the Regulations welding procedure card check of welding groove type and dimensions correspond to. (4) on each side of groove surface grinding, butt edge offset is not greater than the10% thickness, and not more . (5) point fixed the first weld layer terminal welding length not less than 50mm, arc board specifications should be 150*150mm and a mask having R arc, team rounds should be given within 8 hours of welding, or to use flame to the moisture inside the baking groove. (6) the welder holds welding and welding records for welding consumables, welding two class library for registration, using flux field volume should not exceed 4 hours, or to continue to back into the oven drying. (7) a, preheating plate thickness not less than 30mm carbon steel, low alloy steel, the preheating temperature of welding process by card, standard provisions of the welding technology. B, preheating range width not less than 4mm and no less than 100mm. C, in the process of welding groove at any time temperature shall not be less than the prescribed temperature. D, when welding temperature is below 0 ℃ ( arbitrary thickness) must be heated to 15 ℃ or above in order to welding. (8) a before welding, welding to welding equipment inspection, examination was normal before welding facilities. According to B, the requirements of welding process welding, welding and fill in the records C, welding, welding layers shall be in accordance with welding requirements, welding shall not be a large current, less layers. (9) removal of the root a, stainless steel cleaning before the root groove sides, within the range of 300mm, splashing paint coating. 3 B, using carbon arc air gouging, should be selected according to the request carbon rod diameter. C, root cleaning, grinding cleaning groove and two side the existence of carburized layer, oxide, slag and other sundries. Grinding width: manual welding, rust, oxide above 20mm, oil30mm above, automatic welding, rust, grease, oxides 25mm50mm groove inner grinding requirements, carbon steel, low alloy steelδ n ≤ 10mm weld, its two ends within the range of 300mm carburized layer must be pletely removed, the rest part allows the removal of more than 50%. Other nonferrous metals must be pletely clear. [3] D, root cleaning, posite steel CrMo, manual welding and the thickness ofδ n ≥ 30mm welds shall be examined by PT. (10) during the process of welding defect repair by welding repair welding repair monitor instruction experienced welders as. Repair welding process should eliminate soldering phenomenon, or polished after welding, the following defects must be removed before welding to welding crack,①partial②③ pits the stoma A shall not be lower than the parent material, weld. B, there shall be no undercutting. C, without removing the residual high seam. The surface shall not have cracks, pores, crater, undercut and slag inclusions, and may not retain the slag and spatter. D, removal of residual high weld inspection shall not have any defect display PT. E, such as the defects of carbon steel, lowalloy steel repair procedures: a grinding wheel or a carbon arc gouging polishing cleaning→ PT check grinder grinding out the welding groove, welding, PT, stainless steel repair procedures: a grinding wheel or a carbon arc gouging polishing cleaning→ PT (δ n≥ 2mm need )→ grinder polished to a welding groove welding→ PT examination. [4] (12) welded internal rework, repair procedures: location of defect, defect removal→ PT→→ removal check welding weld→ PT examination. [5] (13) according to RT film, RT staff and the welders in welding seam together determine the location of defects, including the following requirements when using UT to determine the defect position, the first 4 repairδ n≥ 30mm use UT to determine the location of defects, two or three repairδ n≥ 20mm using UT to determine the defect position, UT positioning by RT after class. The position and depth of defect ( calibration side shall be the depth of defect≤ 1/2 side). (14) after the welding inspector or monitor by confirmed