Hot-rolled high-strength steel for double-faced enamel and double-faced enamel steel, and manufacturing methods thereof

A manufacturing method and high-strength steel technology, which is applied in the field of steel and its manufacturing, can solve the problems of steel plate strength reduction, second-phase strengthening effect reduction, and inability to meet the structural safety requirements of large-volume assembled tanks, and achieve good surface quality and high strength Effect

Active Publication Date: 2018-12-07
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when this type of steel plate is sintered at high temperature (800-890°C), the TiC precipitates will aggregate and grow to varying degrees with the increase of the sintering temperature and the extension of the holding time, thereby strengtheni

Method used

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  • Hot-rolled high-strength steel for double-faced enamel and double-faced enamel steel, and manufacturing methods thereof
  • Hot-rolled high-strength steel for double-faced enamel and double-faced enamel steel, and manufacturing methods thereof
  • Hot-rolled high-strength steel for double-faced enamel and double-faced enamel steel, and manufacturing methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7 and comparative example 1

[0066] Table 1 lists the mass percentages of each chemical element in the high-strength steel for hot-rolled double-sided enamelling of Examples 1-7 and the conventional steel of Comparative Example 1.

[0067] Table 1. (wt%, the balance is Fe and other unavoidable impurities except P, S, N)

[0068]

[0069]

[0070]

[0071] Note: M*=C-(Ti-3.43×N-1.5×S) / 4-Nb / 7.75-V / 4.25; N*=0.7125N+3.125S+6.25Ti+5.65Nb+6.15V; L*= (Si+Mn)×Cr, wherein C, Ti, N, S, Nb, V, Si, Mn, and Cr in the formulas of M*, N*, and L* respectively represent the numerical values ​​of the mass percentages of the corresponding elements.

[0072] The manufacturing method of the high-strength steel for hot-rolled double-sided enamel of embodiment 1-7 and the conventional steel of comparative example 1 adopts the following steps to make:

[0073] (1) Carry out smelting and vacuum degassing according to the proportioning of each chemical element listed in Table 1;

[0074] (2) Casting;

[0075] (3) Hot r...

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Abstract

The invention discloses hot-rolled high-strength steel for double-faced enamel. The hot-rolled high-strength steel comprises the following chemical elements by mass: 0.08 to 0.15% of C, 0.15 to 0.50%of Si, 1.2 to 2.5% of Mn, 0.006 to 0.08% of Al, 0.15 to 0.65% of Cr, 0.01 to 0.06% of Ti, 0.01 to 0.10% of Nb, 0.10 to 0.35% of Cu, 0.03 to 0.15% of Mo, 0.02 to 0.10% of V, no more than 0.03% of P, nomore than 0.006% of S and no more than 0.006% of N, with the balance being Fe and other unavoidable impurities. Correspondingly, the invention also discloses double-faced enamel steel. The double-faced enamel steel is prepared from the hot-rolled high-strength steel for double-faced enamel through enamel firing. The microstructure of the double-faced enamel steel is granular bainite. Moreover, the invention also discloses manufacturing methods for the hot-rolled high-strength steel and the double-faced enamel steel.

Description

technical field [0001] The invention relates to a steel and a manufacturing method thereof, in particular to a steel for enamelling and a manufacturing method thereof. Background technique [0002] As we all know, high-strength double-sided enamelled steel plates are mainly used as the base plate of enamelled steel for assembled tanks. This kind of enameled assembled tanks can be used in large-scale water treatment facilities, chemical facilities, environmental protection facilities and other fields, such as urban garbage seepage and domestic sewage treatment , industrial sewage treatment, fresh water storage, etc.; can also be used as an anaerobic fermentation assembly tank, enamel steel plate biogas digester, assembled enamel steel plate granary assembly tank, etc. The volume range of assembled tanks is relatively large, ranging from tens of cubic meters to tens of thousands of cubic meters. [0003] The processing technology of enamel steel plate for assembled tank mainl...

Claims

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Application Information

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IPC IPC(8): C22C38/38C22C38/04C22C38/02C22C38/06C22C38/28C22C38/26C22C38/20C22C38/22C22C38/24C21D8/02C23D5/02
CPCC21D8/0226C21D2211/002C21D2211/005C21D2211/009C22C38/02C22C38/04C22C38/06C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/38C23D5/02
Inventor 王双成孙全社
Owner BAOSHAN IRON & STEEL CO LTD
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