Wedge top type ultralow-temperature ball valve
An ultra-low temperature, top-type technology, applied in the field of machinery, can solve the problems of flammability and explosion, volume expansion, medium leakage, etc., and achieve the effect of increasing surface area, reducing impact and reducing friction.
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Embodiment 1
[0036] A wedge-top ultra-low temperature ball valve prepared by the following method:
[0037] (1) Determine the chemical element composition of stainless steel, according to the weight percentage: carbon: 0.02%, silicon: 0.15%, manganese: 0.7%, nickel: 0.5%, chromium: 19%, molybdenum: 4%, copper: 0.5%, Boron: 0.05%, phosphorus: 0.05%, nitrogen: 0.3%, and the rest is Fe;
[0038] (2) Smelting: put the raw materials in the above ratio into the vacuum induction furnace, melt and melt at 1700 °C, after the melting is over, take samples for analysis, and deoxidize slagging, reduce the steel temperature during deoxidizing slagging, and control the steel temperature at 1450°C, after the analysis results meet the requirements, add Al-5Ti-B, Al-10Sr and RE three metal refinement modifiers, the weight percentage ratio of the three added is 8:2:1, refining to slag white, improving The tapping temperature is 1650°C, and the tapping is poured into the ladle, and the molten steel pouring ...
Embodiment 2
[0053] A wedge-top ultra-low temperature ball valve prepared by the following method:
[0054] (1) Determine the chemical element composition of stainless steel, according to the weight percentage: carbon: 0.05%, silicon: 0.10%, manganese: 1.1%, nickel: 0.5%, chromium: 15%, molybdenum: 4%, copper: 0.5%, Boron: 0.05%, phosphorus: 0.05%, nitrogen: 0.3%, and the rest is Fe;
[0055] (2) Smelting: Put the raw materials in the above ratio into the vacuum induction furnace, melt and melt at 1850 °C, after the melting is over, take samples for analysis, and deoxidize slag, reduce the steel temperature during deoxidation and slagging, and control the steel temperature at 1400°C, after the analysis results meet the requirements, add Al-5Ti-B, Al-10Sr and RE three metal refinement modifiers, the weight percentage ratio of the three added is 8:2:1, refining to slag white, improving The tapping temperature is 1650°C, and the tapping is poured into the ladle, and the molten steel pouring ...
Embodiment 3
[0070] A wedge-top ultra-low temperature ball valve prepared by the following method:
[0071] (1) Determine the chemical element composition of stainless steel, according to the weight percentage: carbon: 0.03%, silicon: 0.14%, manganese: 0.8%, nickel: 0.5%, chromium: 18%, molybdenum: 4%, copper: 0.5%, Boron: 0.05%, phosphorus: 0.05%, nitrogen: 0.3%, and the rest is Fe;
[0072] (2) Smelting: put the raw materials in the above ratio into the vacuum induction furnace, melt and melt at 1750 °C, after the melting is completed, take samples for analysis, and deoxidize slagging, reduce the steel temperature during deoxidation and slagging, and control the steel temperature at 1449°C, after the analysis results meet the requirements, add Al-5Ti-B, Al-10Sr and RE three metal refinement modifiers, the weight percentage ratio of the three added is 8:2:1, refining to slag white, improving The tapping temperature is 1650°C, and the tapping is poured into the ladle, and the molten steel...
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