FIELD: technological processes.
SUBSTANCE: invention relates to a method of manufacturing parts made of heat-resistant nickel-based alloys, intended for operation at elevated temperatures in gas turbine engines. Part is produced by selective laser fusion with a laser power of 280 to 320 W, a scanning speed of 700 to 760 mm/s, a layer thickness of 50 mcm and a scanning step of 0.12 mm. Process of manufacturing parts using selective laser fusion technology takes place inside a sealed chamber in a protective gas environment. Heat treatment is carried out at a temperature of 1,000±100 °C for 2 hours. Heating of the parts is carried out gradually with an exposure for 2 hours at temperatures of 200 °C, 400 °C, 600 °C, 800 °C. Cooling parts carried out in conjunction with the stove.
EFFECT: obtaining parts with low porosity, high mechanical properties and low residual stresses.
1 cl, 2 dwg, 1 tbl
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Authors
Dates
2018-12-13—Published
2018-06-05—Filed