Heat treatment process of 30Cr2Ni2Mo: quenching 850 degrees; coolant: oil; tempering temperature 520 degrees; coolant: water, oil, 30Cr2Ni2Mo alloy steel
Execution standard: GB/T 3077 -2015
Chemical composition of 30Cr2Ni2Mo alloy steel
Carbon C: 0.26-0.34
Silicon Si: ?≤0.40?
Manganese Mn ：0.3-0.6?
Chromium Cr: 1.8-2.2?
Nickel Ni: 1.8-2.2
Molybdenum Mo: 0.3-0.5?
Sulfur S: ≤0.035?
Phosphorus P: ≤0.035?
30Cr2Ni2Mo alloy steel, 30Cr2Ni2Mo round bar, has high yield strength, tensile strength and fatigue strength , and has sufficient plasticity and toughness. ?
Generally, electric arc furnace and oxygen top-blown converter are used for smelting. For demanding applications, out-of-furnace refining, electroslag remelting or vacuum treatment, vacuum induction furnace smelting or double vacuum smelting, and appropriate heat treatment are used. ?
Widely used, in addition to high-pressure chemical containers with high pressure and frequent fluctuations, it is also used in pressure pipes, plastic molds, important structures, etc. For example, the main shafts of Dongfang Turbine Factory's FD70A and FD77A wind turbine generator sets are made of high-quality alloy steel (30CrNiMo8 alloy steel) forgings.
What does the elevator of a wind turbine look like?
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There is no elevator inside the wind turbine, only steps.
The reason is very simple. The cost of elevators is high, but the utilization rate when used in wind turbines is too low. In addition, wind turbines are originally energy-saving products, and elevators require large amounts of electricity. Considering all things considered, there is no special reason. There will be no elevator installed.