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Production method for making vehicle-mounted concrete tank

A production method and concrete technology, applied in the field of metallurgical manufacturing, can solve the problems of short service life of tanks and poor wear resistance of steel plates, and achieve the effects of easy processing, good corrosion resistance and good service performance.

Active Publication Date: 2021-01-08
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a production method for making a vehicle-mounted concrete tank, so as to solve the technical problems in the prior art that the steel plates used to make the tank have poor wear resistance and the service life of the tank is short

Method used

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  • Production method for making vehicle-mounted concrete tank

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Experimental program
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Effect test

Embodiment 1

[0025] In this embodiment, the steel plate thickness of the vehicle-mounted concrete tank is 2.0mm, and its chemical composition and mass percentage are: C: 0.15%, Si: 0.10%, Mn: 3.35%, P: 0.011%, S: 0.003% , Cu: 0.20%, Ti: 0.010%, Als: 0.020%, N: 0.0042%, and the balance is Fe and unavoidable impurities.

[0026] In this embodiment, the production method for making a vehicle-mounted concrete tank includes slab heating, high-pressure water dephosphorization, controlled rolling and curling processes, and the specific process steps are as follows:

[0027] (1) Slab heating process: heating the slab to 1180°C;

[0028] (2) High-pressure water phosphorus removal process: the pressure of phosphorus removal water is 18.0MPa;

[0029] (3) Controlled rolling process: rough rolling is rolled by 5 rolling mills, and the exit temperature is 1060°C; finish rolling is rolled by 7 rolling mills, the finish rolling entrance temperature is 980°C, and the exit temperature is 840°C;

[0030] ...

Embodiment 2

[0033] In this embodiment, the steel plate thickness of the vehicle-mounted concrete tank is 6.0mm, and its chemical composition and mass percentage are: C: 0.17%, Si: 0.15%, Mn: 4.42%, P: 0.013%, S: 0.005% , Cu: 0.35%, Ti: 0.019%, Als: 0.035%, N: 0.0040%, and the balance is Fe and unavoidable impurities.

[0034] In this embodiment, the production method for making a vehicle-mounted concrete tank includes slab heating, high-pressure water dephosphorization, controlled rolling and curling processes, and the specific process steps are as follows:

[0035] (1) Slab heating process: heating the slab to 1220°C;

[0036] (2) High-pressure water phosphorus removal process: the pressure of phosphorus removal water is 19.0MPa;

[0037] (3) Controlled rolling process: rough rolling is rolled by 5 rolling mills, the outlet temperature is 1020°C; finishing rolling is rolled by 7 rolling mills, the finishing rolling inlet temperature is 1000°C, and the outlet temperature is 860°C;

[00...

Embodiment 3

[0041] In this embodiment, the steel plate thickness of the vehicle-mounted concrete tank is 10.0mm, and its chemical composition and mass percentage are: C: 0.18%, Si: 0.20%, Mn: 4.50%, P: 0.015%, S: 0.010% , Cu: 0.40%, Ti: 0.025%, Als: 0.030%, N: 0.0060%, and the balance is Fe and unavoidable impurities.

[0042] In this embodiment, the production method for making a vehicle-mounted concrete tank includes slab heating, high-pressure water dephosphorization, controlled rolling and curling processes, and the specific process steps are as follows:

[0043] (1) Slab heating process: heating the slab to 1240°C;

[0044] (2) High-pressure water phosphorus removal process: the pressure of phosphorus removal water is 22.0MPa;

[0045] (3) Controlled rolling process: rough rolling is rolled by 5 rolling mills, the outlet temperature is 1060 ° C; coiled by hot coil boxes; finishing rolling is rolled by 7 rolling mills, the finishing rolling entrance temperature is 1030 ° C, and the e...

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Abstract

The invention provides a production method for manufacturing a vehicle-mounted concrete tank, and relates to the technical field of metallurgy manufacturing. Raw materials include, by mass percent, 0.15%-0.18% of C, 0.10%-0.20% of Si, 3.35%-4.50% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.010% of S, 0.20%-0.40% of Cu and the like. The method comprises the following machining steps including the slab heating procedure, the high-pressure descaling procedure, the controlled rolling procedure and the curling procedure. According to the provided production method for manufacturing the vehicle-mounted concrete tank, the high manganese content is adopted, so that a matrix structure of a produced steel plate contains a large amount of metastable state austenite, and the characteristics that plasticity is good, and machining forming is easy are achieved. After the surface of the steel plate is subjected to impacts, the surface austenite can be converted into a hardmartensitic structure, accordingly, very high hardness and abrasion resisting performance are achieved, the steel plate is suitable for the later usage environment in which continuous friction with concrete exists, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of metallurgical manufacture, and more specifically relates to a production method for making a vehicle-mounted concrete tank. Background technique [0002] Concrete mixer truck is a special truck used to transport concrete for construction. These trucks use cylindrical tanks to carry concrete. The tank body will always keep rotating and stirring during transportation to avoid the solidification of the carried concrete. Most of the tank body of the existing concrete mixer truck is made of formed steel plates using welding technology. Since the tank wall is constantly in contact with the mud during use and wears out, the steel plates used are required to have good Formability, welding performance and high strength and toughness and wear resistance. [0003] At present, the service life of tanks produced in the domestic market is relatively short, mainly because the formed steel plate has poor wear resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/14C22C38/16C22C38/06C21D8/02
CPCC21D8/0226C21D2211/001C22C38/02C22C38/04C22C38/06C22C38/14C22C38/16
Inventor 张贺佳张晓磊罗波王宝华张振全耿立唐
Owner HEBEI IRON AND STEEL
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