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Multi-element microalloy structural steel and preparation method

A technology of micro-alloy and structural steel, which is applied in the field of carbon steel manufacturing, can solve the problems of poor impact toughness and plasticity, and achieve the effect of improving impact toughness, facilitating manufacturing, and taking into account tensile strength and reduction of area

Pending Publication Date: 2021-02-23
LESHAN TAIGANG SUNKOS MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The nickel-saving rare earth-containing and barium duplex stainless steel alloy material disclosed in this patent document has good elongation after fracture, but its impact toughness and plasticity are still poor.

Method used

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  • Multi-element microalloy structural steel and preparation method
  • Multi-element microalloy structural steel and preparation method
  • Multi-element microalloy structural steel and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051]A multi-element microalloyed structural steel composed of the following raw materials by weight percentage:

[0052]

[0053]According to the traditional sand casting process: ZGQ235B for castings, ZG30 alloy steel for castings and multi-element microalloy structural steel for castings are prepared according to the steps of sand preparation, mold making, core making, modeling, pouring, sand falling, grinding and inspection.

[0054]The ZGQ235B carbon structural steel of the casting and the ZG30 alloy steel of the casting are now compared with the casting multi-element microalloy structural steel prepared in Example 1 of the present invention, see Table 1.

[0055]

[0056]Table 1

Embodiment 2

[0058]A multi-element microalloy structural steel composed of the following raw materials by weight percentage:

[0059]

[0060]According to the traditional sand casting process: ZGQ235B for castings, ZG30 alloy steel for castings and multi-element microalloy structural steel for castings are prepared according to the steps of sand preparation, mold making, core making, modeling, pouring, sand falling, grinding and inspection.

[0061]Now compare the ZGQ235B carbon structural steel of the casting and the ZG30 alloy steel of the casting with the multi-element microalloy structural steel of the casting prepared in Example 2 of the present invention, see Table 2.

[0062]

[0063]Table 2

Embodiment 3

[0065]A multi-element microalloy structural steel composed of the following raw materials by weight percentage:

[0066]

[0067]According to the traditional sand casting process: ZGQ235B for castings, ZG30 alloy steel for castings and multi-element microalloy structural steel for castings are prepared according to the steps of sand preparation, mold making, core making, modeling, pouring, sand falling, grinding and inspection.

[0068]Now compare the ZGQ235B carbon structural steel of the casting and the ZG30 alloy steel of the casting with the multi-element microalloy structural steel of the casting prepared in Example 3 of the present invention, see Table 3.

[0069]

[0070]table 3

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Abstract

The invention discloses a preparation method of multi-element microalloy structural steel, and belongs to the technical field of carbon steel manufacturing. The preparation method is characterized bysequentially comprising the following process steps that a, C, B and Co are dissolved into 200 kilograms of molten iron, and Ti is added without considering burning loss; b, when the temperature of the molten iron is 700-800 DEG C, P, Cu and Mg is added, and Ce and Si are added for catalysis to generate a Si-P-Cu-Mg intermetallic compound, and when the temperature of the molten iron is 1300-1400 DEG C, Mn and S are added to generate a MnS compound; c, Cr, Ni, Mo, V and Ba are sequentially added, Al is added for catalysis, Sn is added after ladle punching, and multi-element microalloy structural steel is prepared; and d, annealing, spheroidizing quenching and tempering treatment are sequentially carried out on the multi-element microalloy structural steel. According to the preparation method of the multi-element microalloy structural steel, compared with carbon structural steel in the prior art, the multi-element microalloy structural steel has high toughness and high plasticity.

Description

Technical field[0001]The present invention relates to the field of carbon steel manufacturing techniques, and more particularly to a multi-microalloy structural steel and a preparation method.Background technique[0002]Carbon structural steel is one of carbon steel. Carbon structure steel contains about 0.05% to 0.70%, and individual can be as high as 0.90%. Carbon structural steel can be divided into two categories of common carbon structural steel and high quality carbon structural steel. The general carbon structure steel contains more impurities, low price, where the performance requirements are not high, and its carbon containing is 0.30%, and the manganese content is not more than 0.80%, the strength is low, but plastics, Toughness, cold deformation performance. In addition to a few cases, it is generally not heat-treated and is used directly. Ordinary carbon structural steel is made of strip steel, shaped steel and steel plates. Many common carbon structural steels are used, w...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/52C22C38/54C22C33/04C21C7/064C21D1/18C21D1/26C21D6/00
CPCC21C7/0006C21C7/064C21D1/18C21D1/26C21D6/004C21D6/005C21D6/007C21D6/008C21D2211/005C21D2211/008C21D2211/009C22C33/04C22C38/001C22C38/002C22C38/005C22C38/008C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/50C22C38/52C22C38/54
Inventor 陈章华陈瑾昱杨敏惠张昌华杨霞罗缝
Owner LESHAN TAIGANG SUNKOS MACHINERY MFG
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