A gh4738 superalloy large-scale ingot blanking method
A high-temperature alloy and alloy ingot casting technology, which is applied in the field of GH4738 high-temperature alloy large-scale ingot casting, can solve the problems of grain structure mixed crystal performance, uneven structure, instability, etc., achieve uniform and fine grain size, and improve yield and stability, satisfying the effect of fine grain uniformity
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Embodiment 1
[0024] A kind of GH4738 superalloy large-scale ingot blanking method steps are as follows:
[0025] (1). Put the homogenized large ingot into the heat treatment furnace to heat and keep it warm. The size of the large alloy ingot is Φ510 mm;
[0026] (2). Upset the steel ingot heated to the specified temperature to obtain the first cake, and then lengthen the cake to obtain the secondary bar;
[0027] (3). Heating the secondary bar, upsetting to obtain a secondary cake base, and then lengthening the cake base to obtain a third bar, so that a uniform and fine-grained bar base can be obtained.
[0028] The specific steps are as follows: heat the large ingot of GH4738 nickel-based superalloy in a heating furnace to 1170 °C, and then place it on a rapid forging hydraulic press for 1 s -1 Upset the steel ingot to 50% of the height of the original steel ingot to obtain a cake base, and then change the length of the cake base back to 80% of the height of the original steel ingot to o...
Embodiment 2
[0033] A kind of GH4738 superalloy large-scale ingot blanking method steps are as follows:
[0034] (1). Put the homogenized large ingot into the heat treatment furnace for heating and heat preservation. The size of the large alloy ingot is Φ620 mm;
[0035] (2). Upset the steel ingot heated to the specified temperature to obtain the first cake, and then lengthen the cake to obtain the secondary bar;
[0036] (3). Heating the secondary bar, upsetting to obtain a secondary cake base, and then lengthening the cake base to obtain a third bar, so as to obtain a uniform and fine-grained bar base.
[0037] The specific steps are as follows: heat the large ingot of GH4738 nickel-based superalloy in a heating furnace to 1180 °C, and then place it on a rapid forging hydraulic press for 1 s -1 Upset the steel ingot to 50% of the height of the original steel ingot to obtain a cake base, and then change the length of the first cake base back to 100% of the height of the original steel in...
Embodiment 3
[0042] A kind of GH4738 superalloy large-scale ingot blanking method steps are as follows:
[0043] (1). Put the homogenized large ingot into the heat treatment furnace to heat and keep it warm. The size of the large alloy ingot is Φ508 mm;
[0044] (2). Upset the steel ingot heated to the specified temperature to obtain the first cake, and then lengthen the cake to obtain the secondary bar;
[0045] (3). Heating the secondary bar, upsetting to obtain a secondary cake base, and then lengthening the cake base to obtain a third bar, so that a uniform and fine-grained bar base can be obtained.
[0046] The specific steps are as follows: heat the large ingot of GH4738 nickel-based superalloy in a heating furnace to 1170 °C, and then place it on a rapid forging hydraulic press for 1.5 s -1 Upsetting the steel ingot to 40% of the height of the original steel ingot to obtain a cake base, and then changing the length of the first cake base back to 80% of the height of the original stee...
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