Cobalt-base alloy welding wire, hook claw using welding wire, connection rod and surfacing method

A cobalt-based alloy and welding wire technology, which is applied in the direction of connecting rods, connecting rod bearings, welding media, etc., can solve the problems of poor process stability, no engineering application value, and low yield, and achieve the effect of hardness and nondestructive testing

Inactive Publication Date: 2014-07-16
SICHUAN HUADU NUCLEAR EQUIP MFR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the surfacing welding of the claws and connecting rods of the control rod drive mechanism, some relevant domestic units have carried out many technical research projects for more than ten years, and can also produce qualified products, but they are not available due to poor process stability and low yield. The actual engineering application value mainly has the following problems: the hardness and non-destructive testing are unqualified

Method used

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  • Cobalt-base alloy welding wire, hook claw using welding wire, connection rod and surfacing method
  • Cobalt-base alloy welding wire, hook claw using welding wire, connection rod and surfacing method
  • Cobalt-base alloy welding wire, hook claw using welding wire, connection rod and surfacing method

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Embodiment 1-3

[0037] The cobalt-based alloy welding wire shown in Table 1 is used, the sum of the mass percentages of each component in the welding wire is 100%, and the diameter is φ2.7mm.

[0038] Table 1 Chemical composition of cobalt-based alloy welding wire (Wt%)

[0039]

[0040] The base material of the claw and the connecting rod is made of 00Cr18Ni10N austenitic stainless steel.

[0041] Pretreatment: Before surfacing, remove the burrs on the surfaces to be surfacing of hooks and connecting rods and other defects that may affect the quality of surfacing, and clean the surfaces to be surfacing.

[0042] Preheating: Preheat the claws and connecting rods to be surfacing, and the preheating temperature is higher than 260°C.

[0043] Overlay welding on the tooth surface of the hook and claw: oxyacetylene flame welding is used, such as Figure 5 As shown, ignite, adjust the flame to be a carbonization flame, and adjust the length of the inner flame L2 to be 2-2.5 times of the flame ...

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Abstract

The invention discloses a cobalt-base alloy welding wire, a hook claw using the welding wire, a connection rod and a surfacing method. The cobalt-base alloy welding wire comprises chemical components including, by mass, 0.9-1.05% of C, 26.0-32.0% of Cr, 3.0-6.0% of W, less than or equal to 3.0% of Ni, less than or equal to 1.0% of Mo, less than or equal to 1.0% of Mn, less than or equal to 2.0% of Si, less than or equal to 3.0% of Fe, and the balance Co. By controlling the content of C, deposited metal meets the requirements of hardness and nondestructive testing.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a cobalt-based alloy welding wire, a claw using the welding wire, a connecting rod and a surfacing welding method. Background technique [0002] The claws and connecting rods are the main executive parts and wear parts of the control rod drive mechanism. The function is to drive the drive rod to move up and down after the tooth surface of the claw engages with the ring groove of the drive rod, thereby driving the reactor control rod to move up and down to achieve adjustment. Reactor power and purpose of shutdown in case of emergency. Due to the continuous wear of the claw tooth surface during operation, the contact surface with the ring groove of the driving rod will become less and less. When the wear reaches the limit, the claw and the driving rod cannot be effectively meshed, resulting in out-of-step or slipping. The life of the mechanism has reached its limit. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K5/18B23K5/213F16C7/00F16H55/00
CPCF16C7/02F16C9/04B23K35/3046B23K5/006B23K5/18B23K5/213F16C7/00F16H55/00
Inventor 李泽文黄朝辉王小军
Owner SICHUAN HUADU NUCLEAR EQUIP MFR
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