Detection specimen and manufacturing method thereof

A method for manufacturing a detection specimen, characterized in comprising:

• welding and depositing a weld pass in a groove of a specimen base of the detection specimen;
• setting a flaw unit in the groove, comprising:
• machining a platform (8) at a preset position in the groove of the specimen base, and machining a first artificial flaw (6) of a preset shape and/or preset size in the platform (8), or no machining is carried out in the platform (8);
• and
• machining in an accessory (9), when the first artificial flaw (6) is machined in the platform (8), a second artificial flaw (7) of a preset shape and/or preset size corresponding to the first artificial flaw (6) in the platform (8), mounting the accessory (9) onto the platform (8), and splicing the first artificial flaw (6) and the second artificial flaw (7) to form a complete artificial flaw;
• or
• machining in the accessory (9), when no machining is carried out in the platform (8), a second artificial flaw (7) of a preset shape and/or preset size, and forming a complete artificial flaw of a preset shape and/or preset size with the second artificial flaw (7) alone;
• precisely welding, after the accessory (9) is mounted onto the platform (8), contact interfaces between the accessory (9) and the platform (8) into an integral structure;
• and
• welding and depositing a subsequent weld pass in the groove on which the flaw unit is provided, to form the detection specimen.