The basis of the heat treatment process design of forgings is mainly the product part drawing and its technical requirements, the rough drawing and its technical requirements, the technical standards of the relevant process design, the technical requirements of the pre-and post-sequence of the heat treatment of forgings, as well as the technical level of the production site operator and the specific conditions of the equipment. In the following, the specific content and application of these bases are described in detail respectively.

1. Product part drawings and technical requirements

The product part drawings shall be valid versions approved according to the prescribed procedures. On the part drawing, there shall be clear technical requirements for hot place:

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

2) The hardness value of the forging after heat treatment (if necessary, other mechanical indicators of the standard sample processed in the same furnace are proposed).

3) For the heat-treated parts of chemical forging parts, the drawings shall indicate the heat-treated parts of the chemical forging parts and their dimensions, the seepage layer and its surface hardness, the seepage layer organization and its related standards.

4) For parts with special inspection requirements after heat treatment of forgings, the inspection category and relevant standards shall be indicated.

2. Part rough drawing and its technical requirements

The part blank drawing is the drawing of casting, forging, welding parts or semi-finished parts derived from the part drawing. When producing a single piece, the blank drawing can generally be drawn with red and blue pens on the part drawing. When mass production should draw the blank drawing separately, and according to the prescribed procedures by the relevant process technical director countersigned and reviewed before it can be used for production. There should be clear technical requirements in the blank sample:

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

2) The hardness value of the blank and its detection location and detection method.

3) When necessary, the organization status of the blank and the relevant standards for implementation should be indicated.

3. Process technical standards

Process technical standards (including process design work quality standards) are an important basis for improving the quality of process design work and evaluating the level of process design. In recent years, the process technology standards of different levels (countries, industries, enterprises) have been continuously improved and improved, which provides a more reliable basis for process design, and greatly improves the process design level and design quality of each enterprise. The engineering and technical personnel engaged in the design of the art should conscientiously implement and implement the process technical standards in the specific work, and constantly improve the level of process technical standards, which is conducive to further improving the quality of products.

In particular, it is pointed out that there are two situations in the so-called "enterprise standards": one is that enterprises are temporarily unable to meet the requirements of industry standards and national standards for some reason, or industry standards and national standards cannot cover the contents of special products of enterprises for the time being. At this time, the enterprise needs to develop its own "enterprise standards" applicable to the enterprise ". The other is the "enterprise internal control standard" formulated by enterprises in order to enhance market competitiveness and exceed industry standards in some technical indicators ".