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对MANAURITE 900合金炉管进行打底焊接时必须对焊缝背面进行保护,防止焊缝根部金属氧化烧损,更好地保证单面焊双面成型焊缝的质量。为此,采用美国金帝国公司生产的“太阳”牌TYPE I型焊接保护剂对MANAURITE 900合金炉管进行TIG打底焊接,并与传统的背面充氩气的实芯焊丝TIG打底焊接进行对比。结果表明,背面免充氩涂覆焊剂的方法使焊接工艺得到了简化,焊缝根部无氧化,焊接质量可靠。
MANAURITE 900 alloy tube backing welding must be on the back of the weld to protect the root to prevent oxidation of the metal oxide burning, to better ensure the quality of single-sided welding double-sided forming weld. To this end, the company uses the “Solar” brand TYPE I welding protection agent produced by the Golden Empire of the United States to make the TIG backing welding of the MANAURITE 900 alloy tube and the traditional back-filling argon-filled solid wire TIG welding comparing. The results show that the backfill method of argon-free flux coating simplifies the welding process, the root of the weld is not oxidized, and the welding quality is reliable.