Welding material for austenitic heat-resistant steel, welding metal and welded structure, and manufacturing method of welded metal and welded structure
A welding material, austenitic technology, applied in welding/welding/cutting items, welding/cutting medium/material, welding equipment, etc., can solve the problems of insufficient water vapor oxidation resistance and insufficient creep strength
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Embodiment 1
[0162] From an ingot obtained by melting and casting steel having the chemical composition shown in Table 1, hot forging, hot rolling, heat treatment, and machining were used to produce a plate (base material) and plate with a thickness of 15 mm, a width of 50 mm, and a length of 100 mm. A plate with a thickness of 4mm, a width of 200mm, and a length of 500mm. Furthermore, a cut filler (cut filler) having a square size of 2 mm and a length of 500 mm was produced by machining using the plate material having a plate thickness of 4 mm. Various performance evaluation tests shown below were performed using these.
[0163] [Table 1]
[0164]
[0165]
[0166] On the end of the length direction of the above-mentioned base material, the figure 1 Beveling of the shape shown. Thereafter, the two grooved base materials were butt-jointed, butt welding was performed by TIG welding using cut filler obtained from the same plate material as each base material as a filler metal. Two ...
Embodiment 2
[0179] A plate (base material) with a thickness of 15 mm, a width of 50 mm, and a length of 100 mm was produced from an ingot obtained by melting and casting steel having the chemical composition shown in Table 3 by hot forging, hot rolling, heat treatment, and machining. Using this, various performance evaluation tests shown below were carried out.
[0180] [table 3]
[0181]
[0182]
[0183] On the end of the length direction of the above-mentioned base material, the figure 1 Beveling of the shape shown. Thereafter, the two base metals with grooves were butt-jointed, and the cutting filler obtained from the plate material of steel A was used as a filler metal, and stack welding was performed in the grooves by manual TIG welding. Two welded joints were made for each base material with a heat input of 9 to 15 kJ / cm.
[0184] After that, for one welded joint, the heating and cooling cycles of "room temperature → 650°C x 108 hours → room temperature" were repeated five...
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