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The basis of heat treatment process design for precision forging

Release time：

2022-10-11

The basis of heat treatment process design for forging parts, mainly product parts drawings and their technical requirements, blank drawings and their technical requirements, technical standards for process design, forging heat treatment before and after the heat treatment of forging parts on the technical requirements of forging parts, as well as the production site operator technical level and equipment specific conditions.

　　1. Product parts drawings and their technical requirements

　　Product parts drawings should be approved in accordance with the provisions of the valid version of the procedure. Parts drawings, there should be a clear technical requirements of the heat: 1) material grade (the material).

　　1) material grade (if necessary, the need to provide the corresponding material standards).

　　2) the hardness value of the forging parts after heat treatment (if necessary, the same furnace treatment of standard specimens of other mechanical properties indicators).

　　3) for chemical forgings heat treatment of parts, drawings should be marked on its chemical forgings heat treatment parts and their dimensions, seepage layer and its surface hardness, seepage layer organization and its related standards.

　　4) for forging heat treatment of parts with special inspection requirements, should be marked with its test category and related standards.

　　2. Parts blank drawing and its technical requirements

　　Parts blank drawing, is derived from the parts drawing, casting, forging, welding or its semi-finished parts drawing. Single-piece production blank pattern can generally be outlined in the parts drawing with red and blue pen; mass production should be drawn separately blank pattern, and according to the prescribed procedures by the relevant process technical person in charge of countersignature and audit can only be used for production. Blank sample should have clear technical requirements: 1) Material grade (the material)

　　1) Material grade (if necessary, the corresponding material standard should be provided).

　　2) The hardness value of the blank and its testing area and testing method.

　　3) If necessary, the organization state of the blank and the implementation of the relevant standards should be indicated.

　　3. Process technology standards

　　Process technology standards (including process design work quality standards), is an important basis for improving the quality of process design work and evaluation of the level of process design. In recent years, different levels (national, industry, enterprise) of process technology standards continue to improve and enhance, providing a more reliable basis for process design, greatly improving the level of process design and design quality of enterprises. Engineering and technical personnel engaged in to the art of design, in the specific work should be seriously implemented, the implementation of technology standards, and constantly improve the level of technology standards, in order to further improve product quality.

　　In particular, the so-called "enterprise standards" have two kinds of cases: one is due to the enterprise for some reason temporarily unable to meet the requirements of industry standards and national standards, or industry standards and national standards temporarily can not cover the content of the enterprise special products. At this time, enterprises need to develop their own "enterprise standards" applicable to the enterprise. The other is to enhance the competitiveness of the market, in some technical indicators beyond the industry standard and the development of "enterprise internal control standards".

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