Method for manufacturing stainless steel heat transfer pipe of nuclear heat exchanger
A technology of heat exchangers and manufacturing methods, which is applied in the direction of manufacturing tools, heat treatment furnaces, metal rolling, etc., can solve the problems of restricting the development speed of nuclear power industry, immature manufacturing methods, and long construction period, so as to improve the process and mechanical properties , Thin pipe wall, the effect of improving mechanical properties
Active Publication Date: 2010-01-13
JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD
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Problems solved by technology
For a long time, the heat transfer tubes used in heat exchangers have been completely dependent on imports. The construction period is long and the cost is high, which greatly restricts the development speed of my country's nuclear power industry.
[0004] For this reason, the domestic
Method used
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Embodiment 1
[0039] In this embodiment, the stainless steel heat transfer straight tube of nuclear power heat exchanger with a small diameter and a thin wall whose outer diameter is 19.05 ± 0.15mm, wall thickness is 1.375 ± 0.10mm, adjustable in length, is manufactured according to the following steps:
[0040] (1) After the Φ67×4.8mm tube blank obtained after perforation is trimmed, smoothed, pickled and ground, the raw material tube is obtained;
[0041] (2) Cold rolling the raw material tube into an intermediate blank tube with an outer diameter of 38±0.50mm and a wall thickness of 2.4±0.24mm through cold rolling equipment and a ring-type die;
[0042] (3) Carry out degreasing and solid solution treatment (1100±20° C.) to the intermediate blank tube in step (2), and carry out straightening and pickling treatment after heat treatment;
[0043] (4) Cold-drawing the intermediate blank tube after pickling in step (3) by cold-drawing equipment in conjunction with the inner mold head to reduc...
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The invention relates to a method for manufacturing a stainless steel heat transfer pipe, in particular to a method for manufacturing a stainless steel heat transfer pipe of a nuclear heat exchanger, comprising the following steps: cold rolling a material pipe to a middle parison pipe having the required pipe outside diameter and wall thickness through a cold rolling device; cold drawing the middle parison pipe to a middle semi-finished product pipe having the required pipe outside diameter and wall thickness through a cold-drawing pipe, and applying a low-frequency alternating magnetic field with a magnetic field frequency of 10-30Hz and a power range of 20-40kW; cold rolling the middle semi-finished product pipe to a finished product straight pipe having the required pipe outside diameter and wall thickness, and applying high-frequency alternating magnetic field with a magnetic field frequency of 30-50Hz and a power range of 70-90kW; performing multiple wiping inside the finished-product straight pipe, deoiling and cleaning; and performing brightness thermal processing and straightening processing. The stainless steel heat transfer pipe of the nuclear heat exchanger produced with a production technique has the characteristics of small caliber, thin wall, high precision, and the like and accords with the using requirement of high-pressure resistance and corrosion resistance of the nuclear heat exchanger in performance.
Description
technical field [0001] The invention relates to a method for manufacturing a stainless steel heat transfer tube, in particular to a method for manufacturing a stainless steel heat transfer tube for a nuclear power heat exchanger. Background technique [0002] As an efficient, clean and environmentally friendly energy source, nuclear power generation has been widely used around the world. At present, more than 450 nuclear power plants have been connected to the grid for power generation, with a total installed capacity of 350 million kilowatts, accounting for 17% of the world's total power generation. , and as resources such as oil and coal become more and more scarce, the proportion of nuclear power generation in the total power generation is showing an obvious upward trend. Nuclear power generation will become a new force in the future power industry, and my country's nuclear power industry is also booming. [0003] The containment spray heat exchanger is one of the importan...
Claims
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Patent Timeline
Login to view more IPC IPC(8): B21C37/06C22C38/58C22C38/54C22C38/52C22C38/42B21B37/16B21B37/56B21C1/22B21C1/24C21D1/74C21D9/08C21D8/10C23G1/08C23G5/02G01N29/04
Inventor 庄建新
Owner JIANGSU YINHUAN PRECISION STEEL TUBE CO LTD
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