Alloy ring forge piece for ultra-high pressure turbine and manufacturing method of alloy ring forge piece
A technology of ultra-high pressure steam turbines and manufacturing methods, applied in the direction of manufacturing tools, engine components, mechanical equipment, etc., can solve the problems of small forging temperature range, high requirements, high pressure hardness, etc., to improve intergranular corrosion resistance and stress resistance Corrosion resistance, effect of improving corrosion resistance
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Embodiment 1
[0054] An alloy ring forging for an ultra-high pressure steam turbine, the alloy ring forging, by mass percentage, its chemical composition includes: carbon ≤ 0.015%, nitrogen 0.1%, manganese 0.6%, chromium 10%, nickel 0.3%, silicon 0.2% , copper 0.1%, aluminum 0.4%, tantalum 0.8%, niobium 1.1%, hafnium 1.5%, cobalt 0.1%, tungsten 1%, molybdenum 0.7%, titanium 0.01%, tin≤0.04%, tellurium 0.3%, lutetium 0.002%, Scandium is 0.001%, and the balance is iron and irremovable impurities. The forging is 2Cr11MoVNbN, and the size of the forging is Φ1317mm×Φ647mm×123mm.
[0055] A method for manufacturing an alloy ring forging for an ultra-high pressure steam turbine, the manufacturing method comprising the following process steps:
[0056] (1) For blanking, the steel ingot is an electroslag round ingot with a size of Φ600×680mm;
[0057] (2) Heating, control the furnace temperature to be less than 600°C, and preheat for 2 hours; heat to 830°C at a heating rate of ≤150°C / h, and maintai...
Embodiment 2
[0076] An alloy ring forging for an ultra-high pressure steam turbine, the alloy ring forging, by mass percentage, its chemical composition includes: carbon ≤ 0.015%, nitrogen 0.2%, manganese 0.75%, chromium 12.5%, nickel 0.45%, silicon 0.4% , copper 0.15%, aluminum 0.5%, tantalum 1.5%, niobium 1.25%, hafnium 2.35%, cobalt 0.2%, tungsten 2%, molybdenum 0.85%, titanium 0.01-0.04%, tin≤0.04%, tellurium 0.3-0.6%, Lutetium is 0.002-0.003%, scandium is 0.001-0.002%, and the balance is iron and irremovable impurities.
[0077] The preferred technical solution is that the forging is a 2Cr11MoVNbN forging, and the size of the forging is Φ1317mm×Φ647mm×123mm.
[0078] A method for manufacturing an alloy ring forging for an ultra-high pressure steam turbine, the manufacturing method comprising the following process steps:
[0079] (1) For blanking, the steel ingot is an electroslag round ingot with a size of Φ600×680mm;
[0080] (2) Heating, control the furnace temperature to be less ...
Embodiment 3
[0099] An alloy ring forging for an ultra-high pressure steam turbine, the alloy ring forging, by mass percentage, its chemical composition includes: carbon ≤ 0.015%, nitrogen 0.1%, manganese 0.6%, chromium 10%, nickel 0.3%, silicon 0.2% , copper 0.1%, aluminum 0.4%, tantalum 0.8%, niobium 1.1%, hafnium 1.5%, cobalt 0.1%, tungsten 1%, molybdenum 0.7%, titanium 0.01%, tin≤0.04%, tellurium 0.3%, lutetium 0.002%, Scandium is 0.001%, and the balance is iron and irremovable impurities. The forging is 2Cr11MoVNbN, and the size of the forging is Φ1317mm×Φ647mm×123mm.
[0100] A method for manufacturing an alloy ring forging for an ultra-high pressure steam turbine, the manufacturing method comprising the following process steps:
[0101] (1) For blanking, the steel ingot is an electroslag round ingot with a size of Φ600×680mm;
[0102] (2) Heating, control the furnace temperature to be less than 600°C, and preheat for 2 hours; heat to 850°C at a heating rate of ≤150°C / h, and maintain ...
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