Method for achieving forming of GH4738 nickel-base superalloy turbine discs
A technology of nickel-based high-temperature alloy and turbine disk, which is applied in the direction of engine components and mechanical equipment, can solve the problems of complex process and low efficiency, and achieve the effect of uniform grain size, stable operation and good grain structure
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[0034] Embodiment 1: This embodiment proposes a GH4738 nickel-based superalloy turbine disk forming method and obtains better performance, which is characterized in that it specifically includes the following steps:
[0035] step 1:
[0036] 1) The regular Φ110mm×260mm cylindrical rod blank is hard-wrapped, the initial grain size is 150μm, and the actual composition of the selected GH4738 alloy is measured to be C: 0.06; Al: 1.42; Ti: 3.15; Co: 13.5; Cr: 20.0; Mo: 4.1; Ni balance. a. First use insulation cotton to firmly wrap the rod material; b. Then use a cut stainless steel plate (0.8mm thick) to hard cover the outside of the insulation cotton, and weld the joints firmly.
[0037] 2) Heat the sheathed bar: a. Place the bar in the effective area of the electric furnace, padded it with refractory bricks below, and control the heating temperature at 1080 ℃; b. Connect the K-type external armor as required Galvanic couple.
[0038] 3) Upsetting process: a. After the blank reaches t...
Example Embodiment
[0051] Embodiment 2: This embodiment proposes a GH4738 nickel-based superalloy turbine disk forming method and obtains better performance, which is characterized in that it specifically includes the following steps:
[0052] step 1:
[0053] 1) The regular Φ102mm×270mm cylindrical rod blank is hard-wrapped, the initial grain size is 160μm, and the actual composition of the selected GH4738 alloy is measured to be C: 0.04; Al: 1.39; Ti: 3.05; Co: 13.3; Cr: 19.8; Mo: 4.05; Ni balance. a. First use insulation cotton to firmly wrap the rod material; b. Then use a cut stainless steel plate (thickness 0.8mm) to hard cover the outside of the insulation cotton, and weld the joints firmly.
[0054] 2) Heat the sheathed bar: a. Place the bar in the effective area of the electric furnace, padded it with refractory bricks, and control the heating temperature at 1060℃; b. Connect the K-type external armor as required Galvanic couple.
[0055] 3) Upsetting process: a. After the blank reaches the...
Example Embodiment
[0062] Example 3:
[0063] This embodiment proposes a method for forming a GH4738 nickel-based superalloy turbine disk and obtains better performance. The difference between the forming process and embodiment 1 lies in step (2): the cake blank obtained in step 1 is subjected to the following die forging process Control: a. Firstly, as shown in 1), the cake blank is hard-wrapped; b. The wrapped cake blank is placed in the effective area of the electric furnace, and the bottom is filled with refractory bricks, and the heating temperature is controlled at 1080 ℃ ; C. Connect the external armor couple as required, type K electric couple; d. After adjusting the preheated mold on the press, use a water lubricant to lubricate the mold cavity to ensure that the temperature is above 350 ℃; e. mold After the forging billet completely reaches the set temperature, the cake billet is quickly transferred to the press mold after being released from the oven, and the cake billet is placed in t...
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