Selective laser melting manufacturing method for high-performance air swirler

Abstract

The invention discloses a selective laser melting manufacturing method for a high-performance air swirler, and belongs to the technical field of aero-engine part manufacturing processes. The invention provides the selective laser melting manufacturing method which is excellent in cold and hot fatigue resistance, relatively short in production cycle and relatively low in production cost. The selective laser melting manufacturing method at least comprises the steps of model construction, high-temperature alloy powder preparation, selective laser melting printing, stress relief heat treatment, shaping heat treatment and support removal, and during high-temperature alloy powder preparation, the prepared high-temperature alloy powder at least comprises the following components in parts by weight: 0.03-0.1 wt% of carbon, 0.03-0.1 wt% of molybdenum, 0.03-0.1 wt% of titanium, 0.03-0.1 wt% of molybdenum and the balance of iron. The content of the chromium element is 32-35 wt%, the content of the tungsten element is 4.3-4.5 wt%, the content of the Mo element is 2.3-3.5 wt%, the content of the aluminum element is 0.7-1.3 wt%, the content of the titanium element is 0.7-1.3 wt%, the content of the niobium element is 0.7-1.3 wt%, the content of the oxygen is 100-150 ppm, the balance is nickel element, and the balance of at least 0.2 mm is reserved on a mounting surface during modeling construction.

Description

technical field [0001] The invention relates to a laser selective melting manufacturing method, in particular to a laser selective melting manufacturing method for high-performance air vortexers, and belongs to the technical field of aero-engine parts manufacturing technology. Background technique [0002] The head of a certain type of aero-engine combustion chamber adopts the structure of an air vortexer. The main function is to generate a high-speed swirling jet at the head of the flame tube to form a low-pressure area, thereby creating a heat recirculation area to ensure the continuous stability of the flame and increase the airflow at the same time. The relative speed of the fuel oil improves the fuel atomization and the formation of air mixture to ensure that the combustion chamber head has a suitable residual gas coefficient. There are generally three groups of air vortexers, and the overflow rates are (3.5-3.6) L / s, (3.6-3.7) L / s, (3.7-3.8) L / s. Since the difference ...

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Problems solved by technology

Because the difference between these three groups is very small, the traditional casting method has the uncertainty of the shrinkage during the casting process and the high processing degree of the mold used in the casting, so the traditional casting method not only has a long cycle and high cost, but also has a high cost. And the pass rate is low

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