Turbine blade capable of enhancing impact toughness and production technique thereof
A technology for steam turbine blades and production process, which is applied in the field of steam turbine blades and their production processes to achieve the effects of improving impact toughness, improving overall impact performance, and weakening the segregation phenomenon of alloy elements
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Embodiment 1
[0046] This embodiment provides a steam turbine blade capable of improving impact toughness and its production process. The mass percentages of its chemical composition are: C: 0.13%, Si: 0.8%, Mn: 0.5%, Cr: 14%, Ni: 0.1 %, Cu: 1.3%, Mo: 0.6%, W: 0.1%, V: 0.36%, Nb: 0.5%, Al: 0.28%, Ti: 0.16%, B: 0.08%, Na: 0.45%, S: 0.02 %, P: 0.03%, rare earth metal: 0.3%, the balance is Fe;
[0047] The chemical composition mass percentage of rare earth metals is: Ce: 8%, Pr: 10%, Nd: 7%, Pm: 3%, Gd: 6%, Lu: 6%, Dy: 10%, Eu: 3%, Tb : 10%, Ho: 1.5%, Er: 2.5%, and the balance is La.
[0048] The production process of the steam turbine blade that can improve the impact toughness of this embodiment is carried out according to the following procedures: hot forging→annealing→tempering→blade machining→quenching and tempering heat treatment→cooling→surface strengthening heat treatment→ultrasonic flaw detection→clean packaging; : Annealing process: After hot forging, heat to 800°C and keep it for ...
Embodiment 2
[0055] This embodiment provides a steam turbine blade capable of improving impact toughness and its production process. The mass percentages of its chemical composition are: C: 0.15%, Si: 0.9%, Mn: 0.8%, Cr: 16%, Ni: 0.3 %, Cu: 1.5%, Mo: 1.1%, W: 0.15%, V: 0.45%, Nb: 0.8%, Al: 0.30%, Ti: 0.18%, B: 0.10%, Na: 0.48%, S: 0.01 %, P: 0.02%, rare earth metal: 0.6%, the balance is Fe;
[0056] The chemical composition mass percentage of rare earth metals is: Ce: 10%, Pr: 12%, Nd: 9%, Pm: 5%, Gd: 9%, Lu: 8%, Dy: 12%, Eu: 5%, Tb : 12%, Ho: 2.5%, Er: 3.5%, and the balance is La.
[0057] The production process of the steam turbine blade that can improve the impact toughness of this embodiment is carried out according to the following procedures: hot forging→annealing→tempering→blade machining→quenching and tempering heat treatment→cooling→surface strengthening heat treatment→ultrasonic flaw detection→clean packaging; : Annealing process: After hot forging, heat to 820°C for 20 minutes...
Embodiment 3
[0064] This embodiment provides a steam turbine blade that can improve impact toughness and its production process. The mass percentages of its chemical composition are: C: 0.14%, Si: 0.85%, Mn: 0.6%, Cr: 15%, Ni: 0.2 %, Cu: 1.4%, Mo: 0.68%, W: 0.12%, V: 0.38%, Nb: 0.6%, Al: 0.29%, Ti: 0.17%, B: 0.09%, Na: 0.46%, S: 0.008 %, P: 0.01%, rare earth metal: 0.5%, the balance is Fe;
[0065]The chemical composition mass percentage of rare earth metals is: Ce: 9%, Pr: 11%, Nd: 8%, Pm: 4%, Gd: 8%, Lu: 7%, Dy: 11%, Eu: 4%, Tb : 11%, Ho: 2%, Er: 2.8%, and the balance is La.
[0066] The production process of the steam turbine blade that can improve the impact toughness of this embodiment is carried out according to the following procedures: hot forging→annealing→tempering→blade machining→quenching and tempering heat treatment→cooling→surface strengthening heat treatment→ultrasonic flaw detection→clean packaging; : Annealing process: After hot forging, heat up to 810°C and hold for 18 ...
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