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A processing method and parts technology, applied in the processing field of aviation PH13-8Mo parts, can solve the problems of large tool wear, difficult machining, low processing efficiency, etc., reduce tool wear, reduce heating time and energy consumption, and improve efficiency effect
Active Publication Date: 2022-05-06
CHENGDU AIRCRAFT INDUSTRY GROUP
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Problems solved by technology
However, the hardness of the material after solid solution + cold treatment + artificial aging is as high as 45HRC, which is extremely difficult to machine, resulting in large tool wear and low processing efficiency
Method used
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Embodiment 1
[0032] The specific process of this embodiment, such as figure 1 shown, including the following steps:
[0033] (1) The PH13-8Mo bar is blanked, blanked, and after at least one die forging and edge trimming, a forging of a certain shape is formed, and annealed at 600~760°C to eliminate the residual stress in the forging process;
[0034] (2) Solid solution treatment of forgings;
[0035] (3) Then cold-treat the forging;
[0036] (4) After the cold treatment is completed, the forgings are roughly machined to initially form blank parts;
[0037] (5) Perform artificial aging treatment on the finished blank parts;
[0038] (6) Finally, finish machining the blank parts to make finished aviation PH13-8Mo parts.
Embodiment 2
[0040] The embodiments of this city are based on the above embodiments, and are further limited in the step (1), the number of die forging is once or twice, and the number of die forging depends on the complexity of the parts, such as figure 1 As shown, during the secondary die forging, it is necessary to trim or clean the forging of the first die forging before the second die forging can be carried out. Other parts of this embodiment are the same as those of the foregoing embodiment, and will not be repeated here.
Embodiment 3
[0042] The embodiment of this city is based on the above embodiments, and further defines that in the step (2), the solution treatment process of the forging is as follows: heating the forging to 800~1000°C, keeping it warm for 150~1800 minutes, and then heating it Raise the temperature by 5~45°C, keep it warm for 50~90 minutes, and cool to room temperature. Realize the stabilization of the solid solution of the PH13-8Mo material and avoid the precipitation of the precipitated phase. Other parts of this embodiment are the same as those of the foregoing embodiment, and will not be repeated here.
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Abstract
The invention discloses a processing method for aviation PH13‑8Mo parts, which comprises the following steps: 1) PH13‑8Mo rods are blanked, blanked, die forged and trimmed at least once to form a forging of a certain shape, And anneal at 600~760°C to eliminate the residual stress in the forging process; 2) Perform solid solution treatment on the forging; 3) Then perform cold treatment on the forging; 4) After the cold treatment is completed, perform rough machining on the forging to initially form blank parts; 5) Perform artificial aging treatment on the finished rough parts; 6) Finally, finish the rough parts to make finished products. The invention adopts the "cold and hot combination" process scheme, the parts are roughly machined in the solid solution state, and most of the material removal work is completed at a lower hardness, the cutting speed is increased, and the loss of the tool is reduced; after rough machining, the forging is equivalent to The thickness is reduced, which reduces the heating time and energy consumption during subsequent artificial aging. It can also perform thermal correction on the deformation of the part, eliminate part of the processing stress, and reduce the deformation of the part.
Description
technical field [0001] The invention relates to the technical field of metal material processing, in particular to a processing method for aviation PH13-8Mo parts. Background technique [0002] PH13-8Mo (0Cr13Ni8Mo2Al) stainless steel has high strength, good fracture toughness and good transverse mechanical properties, and can have excellent stress corrosion resistance in marine and oil and gas environments. Due to the good comprehensive performance of this grade of steel, it has been widely used in the frame, beam and fuel tank with harsh working environment of the aircraft. [0003] In order to obtain the best metal streamline distribution and eliminate casting defects in raw materials, PH13-8Mo parts for aviation use PH13-8Mo forgings as raw materials for processing. In order to make PH13-8Mo meet the mechanical properties required by the standard, PH13-8Mo forgings need to undergo a series of heat treatments, the process is: solid solution - cold treatment - artificial ...
Claims
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