Forging technique for cake forgings

A forging and process technology, which is applied to the forging field of large cake forgings, can solve the problems of uneven deformation of forgings, difficult deformation areas, and scrapped forgings, and achieve the effects of optimizing forging structure, improving deformation uniformity and reducing forming load.

Inactive Publication Date: 2016-03-23
SOUTHEAST UNIV
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Problems solved by technology

In the upsetting process of ordinary flat plate, there is a large hard-to-deform area on the end surface in contact with the upper and lower flat anvils, and the deformation of the forging in the axial direction is uneven, resulting in layered shear cracks and causing the forging to be scrapped

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  • Forging technique for cake forgings
  • Forging technique for cake forgings
  • Forging technique for cake forgings

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] The present invention provides a kind of forging process of cake class forgings, and the method comprises the following steps:

[0031] Step 1: heating the forging to improve the plasticity of the forging and reduce the deformation resistance of the forging;

[0032] Step 2: Open the forging forging to improve the overall deformation uniformity of the forging and ensure uniform mechanical properties;

[0033] Step 3: Return to the furnace to heat the forging; when the temperature of the forging is lower than 800°C, stop forging and return to the furnace for heating;

[0034] Step 4: Forming to forge the ingot to the target forging shape;

[0035] Step 5: Carry out heat treatment on the forging after forging.

[0036] The specifications for the heated forging in step 1 are: the furnace loading temperature is 600°C, and it is kept at this temperature for 2 hour...

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Abstract

The invention relates to a forging technique for cake forgings. The forging technique is characterized by comprising the following steps that 1, the forgings are heated so that the plasticity of the forgings can be improved and the deformation resistance of the forgings can be reduced; 2, the forgings are subjected to billet forging so that the integral deformation uniformity of the forgings can be improved, and the mechanical performance uniformity is guaranteed; 3, the forgings are melted again and heated, when the temperature of the forgings is lower than 800 DEG C, forging is stopped, and the forgings are melted again and heated; 4, formation is conducted, and steel ingots are forged to be in a shape of target forgings; and 5, heat treatment is conducted on the forgings after forging. According to the forging technique, the five-stage heating standard is adopted, and it is guaranteed that the forgings are heated uniformly and thoroughly.

Description

technical field [0001] The invention relates to a forging process method, in particular to a forging method for large cake forgings. Background technique [0002] Large-scale cake forgings are key components of major technical equipment in the nuclear power and thermal power fields. They are mainly used for supporting end caps of nuclear reactor central tubes, evaporator tube sheets, large heads and other main components. Such parts are large in size, difficult to form, and high in production cost. They work in a harsh environment of high temperature, high pressure, and high radioactivity for a long time, and are subjected to changing impact loads brought by high-velocity media, and are prone to fatigue due to alternating loads. Damage will affect the safety factor of the whole generator set. Therefore, the harsh working environment puts forward extremely high requirements on the comprehensive mechanical properties of large cake forgings. [0003] In order to meet the mech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/06B21J5/08B21J1/06
CPCB21J5/06B21J1/06B21J5/08
Inventor 高锦张丁燕青戴挺周怡君马武江
Owner SOUTHEAST UNIV
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