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A stainless steel material, a heating tube using the material and its application

A technology of stainless steel and heating tubes, applied in the field of stainless steel materials, can solve the problems of declining yield of heating tubes, difficulties in refining and processing, and increased production costs, etc., and achieve the effects of reducing the rate of broken tubes, making the smelting process easier, and reducing the difficulty

Active Publication Date: 2022-01-18
QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a stainless steel material, aiming to solve the problem that the aluminum element content in the stainless steel material used for heating tubes in the prior art is too high, which leads to difficulties in its refining and processing, thus greatly reducing the yield of heating tubes and reducing the production rate. The problem of substantial cost increases

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  • A stainless steel material, a heating tube using the material and its application

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preparation example Construction

[0023] A kind of preparation method of stainless steel material of the present invention, comprises the following steps:

[0024] Take carbon steel, metal nickel, metal chromium, metal molybdenum, metal aluminum and metal titanium, and smelt them in an electric furnace to obtain molten steel;

[0025] Under vacuum or an inert atmosphere, the molten steel is subjected to secondary refining to obtain a billet, and the composition of the billet is adjusted to reach the content of each element in the stainless steel material described in any one of the above;

[0026] Continuous casting or die casting of billets to produce rough steel plates with a width of 1200-1300 mm and a thickness of 200-240 mm;

[0027] The thick steel plate is hot-rolled into steel coil twice, and the thickness of the steel coil is 3-5mm;

[0028] The steel coil is cut, twice cold rolled and heat treated to make a steel plate with a thickness of 0.25-1mm and a width of less than 400mm, that is, stainless s...

Embodiment 1

[0037] A kind of preparation method of stainless steel material of the present invention, comprises the following steps:

[0038] 1) Take carbon steel, metal nickel, metal chromium, metal molybdenum, metal aluminum and metal titanium, and smelt them in an electric furnace to obtain molten steel;

[0039] 2) Under vacuum atmosphere, carry out secondary refining to above-mentioned molten steel, obtain billet, adjust the composition of billet to be:

[0040] C 0.03%, Si 1.00%, Mn 1.00%, Ni 16.00%, Cr 18.00%, Mo 0.50%, Al 0.15%, Ti 0.10%, Cu 0.75%, P 0.030%, S 0.015%, Fe balance;

[0041] 3) continuous casting billets, made of rough steel plates with a width of 1200 mm and a thickness of 200 mm;

[0042] 4) The thick steel plate is hot-rolled into steel coil twice, and the thickness of the steel coil is 3mm;

[0043] 4) The steel coil is cut, cold rolled twice and heat treated to make a steel plate with a thickness of 0.25mm and a width of 400mm, that is, a stainless steel mater...

Embodiment 2

[0045] A kind of preparation method of stainless steel material of the present invention, comprises the following steps:

[0046] 1) Take carbon steel, metal nickel, metal chromium, metal molybdenum, metal aluminum and metal titanium, and smelt them in an electric furnace to obtain molten steel;

[0047] 2) Under a nitrogen atmosphere, the above-mentioned molten steel is subjected to secondary refining to obtain a billet, and the composition of the billet is adjusted to be:

[0048] C 0.005%, Si 0.30%, Mn 0.50%, Ni 20.00%, Cr 23.00%, Mo 3.00%, Al0.65%, Ti 0.65%, Cu 0.50%, P 0.02%, S 0.010%, Fe balance;

[0049] 3) Die-cast steel billets to make rough steel plates with a width of 1300 mm and a thickness of 240 mm;

[0050] 4) The rough steel plate is hot-rolled into steel coil twice, the thickness of the steel coil is 5mm, the starting temperature of hot rolling is 1050°C, the final rolling temperature is 950°C, and the maintenance rolling temperature is 1100°C;

[0051] 4) S...

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Abstract

The invention discloses a stainless steel material, a heating pipe using the material and its application. The invention includes the following elements: C≤0.03%, Si≤1.00%, Mn≤1.00%, Ni16.00-20.00%, Cr18.00 ‑23.00%, Mo0.50‑3.00%, Al0.15‑0.65%, Ti0.10‑0.65%, Cu≤0.75%, P≤0.030%, S≤0.015%, Fe balance; the present invention also provides The preparation method and application of the above-mentioned stainless steel material. The content of aluminum element in the stainless steel material of the present invention is low, and Ni will not be produced in the refining process 3 The AlTi phase is precipitated, and the resulting steel billet has good ductility and easy extension, which greatly reduces the difficulty in the subsequent hot rolling and cold rolling process. When making the heating tube, the broken tube rate of bending is greatly reduced, the yield rate is greatly improved, and the electric current is reduced. The production cost of the water heater.

Description

technical field [0001] The invention belongs to the technical field of stainless steel materials, in particular to a stainless steel material suitable for heating pipes. Background technique [0002] Electric water heaters refer to water heaters that use electricity as energy for heating. Electric water heaters are juxtaposed with gas water heaters and solar water heaters. They are the three most commonly used water heaters today. Because electric water heaters do not pollute the environment during use, and their performance is not affected by weather, seasons and climates, electric water heaters are widely loved by people. The electric water heater is heated by the electric heating tube, and the quality of the electric heating tube is directly related to the performance and safety performance of the electric water heater. [0003] At present, the electric heating tubes used in electric water heaters are mainly stainless steel heating tubes. These heating tubes are made of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C38/44C22C38/06C22C38/02C22C38/04C22C38/42C22C30/02C22C33/04C21D8/02H05B3/42
CPCC22C38/50C22C38/44C22C38/06C22C38/02C22C38/04C22C38/42C22C30/02C22C33/04C21D8/0226C21D8/0236H05B3/42
Inventor 盛保敬王军孙强赵小勇苏进
Owner QINGDAO ECONOMIC & TECHN DEV ZONE HAIER WATER HEATER
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