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Nuclear primary blasting valve shear cap forging process

A technology of blasting valve and process, which is applied in the direction of valve device, etc., can solve the problems that the performance of forgings cannot be guaranteed to meet the blasting valve project, etc., and achieve the effect of mechanical performance, uniform performance, and uniform structure

Active Publication Date: 2017-10-24
DALIAN DAGAO VALVE +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process of the shear cap generally goes through raw material treatment, heating, forging, cooling, forming and other processes. The shear cap is made of a special high-temperature nickel-based alloy material, namely INCONEL 690. There is no mature forging process for this material at home and abroad for reference. , the performance of the forging cannot be guaranteed to meet the requirements of the blasting valve project. This alloy material is a blank technology at home and abroad in the field of forging

Method used

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  • Nuclear primary blasting valve shear cap forging process
  • Nuclear primary blasting valve shear cap forging process
  • Nuclear primary blasting valve shear cap forging process

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0038] The forging process of the shear cap of the nuclear primary blasting valve is characterized in that it includes the following specific process steps:

[0039] 1. Raw material cutting

[0040] Carry out blanking according to the required size. After the blanking is completed, it will form a section of the required shape, and the edges and corners of the end of the section will be blunted;

[0041] The obtuse angle R of the end corners is 5%-10% of the diameter of the material section; taking the 18-inch shear cap as an example, the blanking size is Ф380×1158, the end chamfer R30, round steel or square steel.

[0042] 2. Raw material heating

[0043] 1) Heating furnace heating pre-treatment

[0044] Chamber-type heating furnace is adopted, and austenitic stainless steel plates without ferrite should be paved in the furnace before heating....

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Abstract

The invention discloses a nuclear-grade 1 blasting valve shearing cap forging process. The nuclear-grade 1 blasting valve shearing cap forging process is characterized by comprising specific process steps of: (a) blanking of raw materials; (b) heating of the raw materials; (c) a forging deformation procedure; (d) cooling; and (e) separation of a finished product from a shearing cap after blasting. The forging process of the shearing cap with a high-temperature nickel base alloy material fills the technical blank of a nickel base alloy in the forging field; a forged shearing cap forging is continuous in metal flow line and uniform in metallographic structure, and the mechanical performance is qualified; the raw materials are blanked to prevent corner crack during forging; and the selection of furnace charging temperature during heating prevents rupture in forging caused by excessive thermal stress due to weak heat conductivity of the materials.

Description

technical field [0001] The invention belongs to the field of forging technology development and manufacturing of nuclear power valve parts, and in particular relates to a forging process of a high-temperature alloy shear cap in a nuclear primary blasting valve part. Background technique [0002] The first-level nuclear blasting valve project has extremely strict requirements on the performance of the product, and the shear cap is the core component of the nuclear first-level blasting valve product, which has special requirements for the internal and external quality of the product, so the performance of the forging directly affects the entire Product performance. The production process of the shear cap generally goes through raw material treatment, heating, forging, cooling, forming and other processes. The shear cap is made of a special high-temperature nickel-based alloy material, namely INCONEL 690. There is no mature forging process for this material at home and abroad f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21K1/20B21J1/06
CPCB21J1/06B21K1/20
Inventor 纪长全卞涛张文孝
Owner DALIAN DAGAO VALVE
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