Submerged arc sintered flux and production method thereof

Abstract

The invention relates to a hull building high efficiency welding process, and a welding technique for flux copper liner multi-filament single side automatic submerged arc welding, in particular to an automatic submerged arc welding sintered flux comprising a top surface flux and a liner flux and a production method thereof. The submerged arc sintered flux consists of the top surface flux and the liner flux. The top surface flux comprises the following components: 5 to 10 percent of CaO, 15 to 20 percent of MgO, 7 to 14 percent of Al2O3, 3 to 6 percent of MnO, 10 to 15 percent of SiO2, 5 to 10 percent of TiO2, 34 to 38 percent of Fe2O3, 2 percent of rare earth ferrosilicon, 1 percent of ferrotitanium, 0.5 percent of borax, and 0.5 percent of ferromanganese; and the liner flux comprises the following components: 15 to 20 percent of CaO, 30 to 35 percent of MgO, 5 to 10 percent of Fe2O3, 10 to 15 percent of MnO, 15 to 20 percent of SiO2, 5 to 10 percent of TiO2, and 4 to 5 percent of Na2O.

Description

Technical field: [0001] The invention relates to a high-efficiency welding process for ship hull construction, a welding technology for multi-wire single-sided submerged arc automatic welding of flux copper pads, in particular to a submerged arc automatic welding sintered flux containing upper surface flux and backing flux and a production method thereof. Background technique: [0002] With the large-scale tonnage of ships, a large number of block construction methods have been adopted in the construction of the hull. In the past, automatic submerged arc single-side welding was used for the splicing of ship plates. However, due to the increase in plate thickness and joint length of the joints, the weight and occupied area of ​​the sections also increase, which brings a lot to the section turning over and bottom welding. Difficult, and there are high requirements for the height of the plant and the number of lifting equipment. At the same time, the double-sided welding efficiency ...

AI Technical Summary

Problems solved by technology

For domestic shipyards, there are many problems in using imported FCB welding consumables: first, the price is very high; second, the order cycle is long; third, after-sales service is not timely, etc.

In terms of process performance, the existing imported FCB welding consumables are prone to transverse cracks and terminal cracks when welding medium-thickness high-strength steel plates

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