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Nuclear reactor control rod loop chain production process

A technology for nuclear reactors and production processes, applied in manufacturing tools, furnace types, furnaces, etc., can solve the problems of unsatisfactory welding section size, low flash welding efficiency, deformation of anchor chain rings, etc. The effect of reducing stress concentration

Active Publication Date: 2018-08-03
ZHEJIANG ANJI CHANGHONG CHAIN MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When performing flash welding in this way, due to the long top distance, large dislocation and strong stress at the end will occur, and it is also easy to cause large deformation of the entire anchor chain ring, and the welding section size does not meet the requirements. The welding efficiency is low, so it is necessary to ensure the size of the link chain and reduce the stress during the welding process, and at the same time, it is necessary to take into account the processing efficiency

Method used

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  • Nuclear reactor control rod loop chain production process
  • Nuclear reactor control rod loop chain production process

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with embodiment.

[0022] A nuclear reactor control rod chain production process, comprising the following steps:

[0023] Step 1, material preparation: the material used in the control rod chain is a nickel-chromium-molybdenum-niobium alloy rod, and the alloy material contains the following components in terms of mass percentage: C: ≤0.1%, Mn: ≤0.5%, Si: ≤0.5%, P: ≤0.015%, S: ≤0.015%, Cr: 20-23%, Nb+Ta: 3.15-4.15%, Co: ≤1%, Mo: 8-10%, Fe: ≤5% , Al: ≤0.4%, Ti: ≤0.4%, Ni: ≥58%.

[0024] Step 2, blanking: use a bar shear to cut the bar.

[0025] Step 3, knitting: install the designed and manufactured mandrel and other tooling on the chain knitting machine, heat the bar and knit it, and control the knitting temperature at 800-830°C.

[0026] Step 4: Shot blasting: use a shot blasting machine to blast the ring chain to make its surface reach the natural color of metal.

[0027] Step 5, welding: bend th...

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Abstract

The invention provides a nuclear reactor control rod loop chain production process. The nuclear reactor control rod loop chain production process comprises the steps of preparing materials, unloading,knotting, shot-blasting and clearing, welding, thermal treatment and stretching, wherein in the welding process, a wedge-shaped pushing block, a baffle block and extruding devices at the two ends ofa loop chain are matched with a flash welding machine to realize welding, so that the dimension of the loop chain is guaranteed, stress is reduced, and processing speed is high.

Description

technical field [0001] The invention relates to the technical field of ring chain production, in particular to a nuclear reactor control rod ring chain production process. Background technique [0002] The ring chain for nuclear energy is a key component of the control rod drive mechanism. It needs to have complex and contradictory comprehensive mechanical properties such as high strength, high toughness, wear resistance, and corrosion resistance. The process requires very specific equipment and technology. Each process requires strict technology and fine control to ensure the external and internal quality of the chain. In the flash welding process of the prior art, when bending the ring, the two ends of the round steel are directly facing each other horizontally, and the two ends are parallel; and in the subsequent flash welding process, the upsetting force in the horizontal direction is directly applied to realize the end of welding. When performing flash welding in this...

Claims

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Application Information

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IPC IPC(8): B23P15/00C22C19/05C21D1/18C21D9/00
Inventor 杨卫波王红华祝跃进范丽平王福华
Owner ZHEJIANG ANJI CHANGHONG CHAIN MFG
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