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Cold machining manufacturing method of large-diameter thin-wall zirconium alloy pipe

A manufacturing method and zirconium alloy technology, which is applied in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems that the mechanical and corrosion properties are difficult to meet the standard requirements, the cost of zirconium alloy pipes is high, and the preparation process is cumbersome. Effects of adhesion, improvement of surface quality, and simple process

Active Publication Date: 2021-09-28
西安西部新锆科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zirconium alloy pipe prepared by the above process not only has difficulty in meeting the standard requirements in mechanical and corrosion properties, but also has cumbersome preparation procedures, resulting in high cost and poor economy of the zirconium alloy pipe.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment includes the following steps:

[0031] Step 1. Grinding treatment: use a rotary forging machine to grind one end of the zirconium alloy pipe material with a size of 86mm×60mm×8000mm (outer diameter×inner diameter×length), and the processing amount per pass of the grinding head treatment is 2mm, and then grind the inner and outer surfaces of the zirconium alloy pipe material treated by the grinding head, and then undergo ultrasonic cleaning for 30 minutes, rinse with deionized water, and dry in a 50°C oven for 60 minutes to obtain the zirconium alloy pipe material to be processed;

[0032] The diameter of the grinding head area of ​​the zirconium alloy pipe raw material after the grinding head treatment is 68mm, and the length is 300mm;

[0033] Step 2, pretreatment: the zirconium alloy pipe to be treated obtained in step 1 is placed in a place containing NH 4 HF 2 and NaNO 3 Soak in the solution at 20°C for 10min, take it out, rinse it with deionized ...

Embodiment 2

[0040] This embodiment includes the following steps:

[0041] Step 1. Grinding treatment: use a rotary forging machine to grind one end of the zirconium alloy pipe material with a size of 220mm×200mm×4000mm (outer diameter×inner diameter×length), and the processing amount per pass of the grinding head treatment is 1mm, and then grind the inner and outer surfaces of the zirconium alloy pipe material treated by the grinding head, and then undergo ultrasonic cleaning for 60 minutes, rinse with deionized water, and dry in an oven at 80°C for 240 minutes to obtain the zirconium alloy pipe material to be processed;

[0042] The diameter of the grinding head area of ​​the zirconium alloy pipe raw material after the grinding head treatment is 68mm, and the length is 300mm;

[0043] Step 2, pretreatment: the zirconium alloy pipe to be treated obtained in step 1 is placed in a place containing NH 4 HF 2 and NaNO 3 Soak in the solution at 20°C for 60min, take it out, wash it with deio...

Embodiment 3

[0050] This embodiment includes the following steps:

[0051] Step 1. Grinding treatment: use a swaging machine to grind one end of the zirconium alloy pipe material with a size of 130mm×100mm×5000mm (outer diameter×inner diameter×length), and the processing amount per pass of the grinding head treatment is 2mm, and then grind the inner and outer surfaces of the zirconium alloy pipe raw material treated by the grinding head, and then undergo ultrasonic cleaning for 40 minutes, rinse with deionized water, and dry in a 60°C oven for 60 minutes to obtain the zirconium alloy pipe to be processed;

[0052] The diameter of the grinding head area of ​​the zirconium alloy pipe raw material processed by the grinding head is 118mm, and the length is 300mm;

[0053] Step 2, pretreatment: the zirconium alloy pipe to be treated obtained in step 1 is placed in a place containing NH 4 HF 2 and NaNO 3 Soak in the solution at 50°C for 10min, take it out, rinse it with deionized water and dr...

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PUM

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Abstract

The invention discloses a cold machining manufacturing method for a large-diameter thin-wall zirconium alloy pipe. The method comprises the steps that firstly, a zirconium alloy pipe raw material is subjected to head grinding treatment and then is ground, cleaned, flushed and dried, and a to-be-treated zirconium alloy pipe is obtained; secondly, after soaking, washing with deionized water and drying, a pretreated zirconium alloy pipe is obtained; thirdly, after the surface is coated with a lubricant, drawing is conducted through a fixed core head, and a drawn zirconium alloy pipe is obtained; fourthly, ultrasonic degreasing, flushing, acid pickling, flushing and drying are carried out; and fifthly, the dried drawn zirconium alloy pipe is subjected to vacuum annealing treatment, and the zirconium alloy pipe is obtained. According to the method, soaking pretreatment is combined with the fixed core head drawing to conduct cold machining on the zirconium alloy pipe to prepare the large-diameter thin-wall zirconium alloy pipe, the size precision of the pipe is strictly controlled, impurity elements are prevented from being adsorbed to the surface of the zirconium alloy pipe in the conventional hot machining process, the stability of chemical components of the zirconium alloy pipe is guaranteed, and the performance of the zirconium alloy pipe is effectively ensured.

Description

technical field [0001] The invention belongs to the technical field of material forming, and in particular relates to a cold working manufacturing method of a large-diameter thin-walled zirconium alloy pipe. Background technique [0002] Metal zirconium has low neutron absorption cross section, excellent corrosion resistance and processing performance, and is an important material in the nuclear industry. Zirconium and zirconium alloys have a series of characteristics such as low density, high specific strength, corrosion resistance and radiation resistance, and can be made into pipes, plates, rods and wires, among which pipes are the main products. At present, there are two main methods of manufacturing large-diameter, thin-walled zirconium alloy pipes at home and abroad. One is to use zirconium alloy plates, process the zirconium alloy plates into approximate circles by rolling machines or bending machines, and then use argon Arc welding is carried out with argon shielded...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21C1/22B21C9/02B21C5/00C23G3/04C21D9/08C21D1/26B21C51/00
CPCB21C37/06B21C1/22B21C9/02B21C5/003C23G3/04C21D9/08C21D1/26B21C51/00Y02E30/30
Inventor 刘跃周宣渠静雯李宇力李新意周军刘海明
Owner 西安西部新锆科技股份有限公司
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