Production method capable of reducing hot working cracking tendency of Mn18Cr18N retaining ring steel
A production method and thermal processing technology, applied in the direction of metal processing equipment, improvement of process efficiency, improvement of energy efficiency, etc., can solve problems such as high temperature deformation resistance, narrow forgeable temperature range, and influence on yield, and achieve good surface, The effect of high yield and short production cycle
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[0027] Example 1
[0028] A Mn18Cr18N guard ring steel forging, the element composition and mass percentage are as follows: C 0.10%, Si 0.80%, Mn 17.5%, Cr 17.5%, Ni 2.0%, N 0.45%, V 0.25%, Ti 0.10%, Al 0.04%, P0.060%, S 0.015%, Fe balance.
[0029] The production method of the above-mentioned Mn18Cr18N guard ring steel forgings is as follows:
[0030] (1) Smelting: Use non-vacuum induction furnace to smelt Mn18Cr18N retaining ring steel, add rare earth alloy (lanthanum-cerium alloy, addition amount of 2‰) before tapping and casting, and control the casting temperature at 1450℃;
[0031] (2) Electroslag remelting: the electroslag remelting slag is CaF by mass percentage 2 :Al 2 O 3 :MgO:SiO 2 =63%:7%:3%:13% is equipped, the control current is 7500±300A, the voltage is 55±5V, and the electroslag steel ingot is prepared;
[0032] (3) Steel ingot forging: heating temperature is 1150℃, opening forging temperature is controlled at 1050℃, and final forging temperature is controlled at 850℃; ...
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[0034] Example 2
[0035] A Mn18Cr18N guard ring steel forging, the element composition and mass percentage are as follows: C 0.08%, Si 0.60%, Mn 20.0%, Cr 20.0%, Ni 2.0%, N 0.80%, V 0.22%, Ti 0.09%, Al 0.03%, P0.050%, S≤0.010%, Fe balance.
[0036] The production method of the above-mentioned Mn18Cr18N retaining ring steel forgings follows the following steps:
[0037] (1) Smelting: Use non-vacuum induction furnace to smelt Mn18Cr18N retaining ring steel, add rare earth alloy (lanthanum-cerium alloy, addition amount of 1‰) before tapping and casting, and control the casting temperature at 1540℃;
[0038] (2) Electroslag remelting: the electroslag remelting slag system is CaF according to the mass percentage 2 :Al 2 O 3 :MgO:SiO 2 =86%:7%:3%:4% is equipped, the control current is 7500±300A, the voltage is 55±5V, and the steel ingot is prepared;
[0039] (3) Steel ingot forging: heating temperature is 1250℃, opening forging temperature is controlled at 1100℃, and final forging temperatu...
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[0041] Example 3
[0042] A Mn18Cr18N guard ring steel forging, the element composition and mass percentage are as follows: C 0.05%, Si 0.65%, Mn 18.5%, Cr 19.0%, Ni 1.8%, N 0.55%, V 0.20%, Ti 0.06%, Al 0.030%, P 0.045%, S 0.010%, Fe balance.
[0043] The production method of the above-mentioned Mn18Cr18N retaining ring steel forgings follows the following steps:
[0044] (1) Smelting: use non-vacuum induction furnace to smelt Mn18Cr18N retaining ring steel, add rare earth alloy (lanthanum-cerium alloy, addition amount 2‰) before tapping and casting, and control the casting temperature at 1510℃;
[0045] (2) Electroslag remelting: the electroslag remelting slag system is CaF according to the mass percentage 2 :Al 2 O 3 :MgO:SiO 2 =82%:10%:5%:3%, control current 7500±300A, voltage 55±5V, prepare steel ingot;
[0046] (3) Steel ingot forging: heating temperature is 1190℃, opening forging temperature is controlled at 1080℃, and final forging temperature is controlled at 880℃;
[0047] (4)S...
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