Forging method of AP1000 nuclear-power main pipeline forging piece

A technology for main pipes and forgings, applied in the field of forging, can solve the problems of increased difficulty in forging, large deformation resistance, narrow forging temperature range, etc., and achieves the effects of improving the utilization rate, reducing the number of forging fires, and improving the qualification rate.

Inactive Publication Date: 2011-01-26
吉林昊宇电气股份有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

At the same time, the forging temperature range of ASME SA376-TP316LN austenitic stainless steel is narrow, the temperature drops quickly, and the deformation resistance is large, which adds a certain degree of difficulty to forging

Method used

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  • Forging method of AP1000 nuclear-power main pipeline forging piece
  • Forging method of AP1000 nuclear-power main pipeline forging piece
  • Forging method of AP1000 nuclear-power main pipeline forging piece

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specific Embodiment approach

[0027] Prepare the steel ingot: the nominal weight is 56000kg, and the specifications are the diameter of the front end D1, the length L, and the diameter of the tail end D2 ( figure 1 shown), heating before forging. Then complete the forging process on the open die forging press with a tonnage of 8000t as follows:

[0028] The first forging: heat the steel ingot to 1200~1220°C, keep it warm for 12 hours, and forge it into a cylinder according to the forging ratio of 1.5 ( figure 2 shown), use an anvil to cut off the head and tail, and then return to the oven to reheat and keep warm.

[0029] The second forging: heat the above steel ingot to 1200~1220℃, keep it warm for 3~4 hours, carry out overall upsetting according to the forging ratio of 2, and upsetting the diameter to ( image 3 shown), and then return to the furnace to reheat and keep warm.

[0030] The third forging: heat the above steel ingot to 1180~1200℃, keep it warm for 3~4 hours, carry out elongation and fo...

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Abstract

The invention relates to a forging method of an AP1000 nuclear-power main pipeline forging piece, belonging to the technical field of forging. The forging method comprises the following steps of: firstly, forging an irregularly-shaped part of the forging piece; and then, integrally forging. The invention not only ensures the dimensional requirement of the irregularly-shaped part of the forging piece, but also ensures the quality requirement of the integral forging piece, can lower forging heating frequency, increases the utilization rate of raw materials and the qualified rate of the forging piece at the same time, achieves the expectation effect before forging and successfully solves the problem on forging the AP1000 nuclear-power main pipeline.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging method of an AP1000 nuclear power main pipeline forging. Background technique [0002] At present, most of the civil nuclear power projects that have been built in my country are second-generation or second-generation semi-nuclear power technologies. In these nuclear power technologies, the processing methods of main pipelines are all manufactured by centrifugal casting. With the promotion of the third-generation nuclear power technology, my country has introduced the safer third-generation AP1000 nuclear power technology of the Westinghouse Company of the United States, requiring the main pipeline to be made of ASME SA376-TP316LN austenitic stainless steel and processed by forging, and the special position of the forging must be Forged as a whole, protruding the special-shaped part of the surface, among them, the two boss parts have a 45-degree corner from t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/14B21J5/00
Inventor 张永胜孙宇
Owner 吉林昊宇电气股份有限公司
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