Steel for high-strength high-tenacity storage rack stand column and production technology of steel

A shelf column and high toughness technology, which is applied in the field of high strength and high toughness steel and its production process, can solve the problems that tensile strength and high yield strength cannot be effectively improved, less research on grain size control, and low strength. Achieve the effect of improving tempering stability, good toughness and good corrosion resistance

Inactive Publication Date: 2015-06-17
SUZHOU KESHENG STORAGE & LOGISTICS EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, there were many domestic studies on the microstructure control of stainless steel forging forming, but there were few studies on the microstructure and grain size control of forging billet rolling forming, that is, the forging and rolling forming process.
Austenitic stainless steel has high corrosion resistance, good cold workability and good toughness, plasticity, weldability and non-magnetism, but the general strength is low, and the tensile strength and high yield strength cannot be effectively improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]This embodiment is a high-strength and high-toughness steel for shelf columns, and its chemical composition weight percentage is: C: 0.20%, Si: 0.8%, Nb: 0.06%, Mn: 1.5%, Al: 0.02%, Ti: 0.005 %, B: 0.005%, Ni: 0.5%, lanthanide rare earth: 0.021%, the rest is Fe and unavoidable impurities; its microstructure is lath martensite and retained austenite, of which the retained austenite The volume percentage is 7.5%; the impact energy at -20°C is 38J, the yield strength is 1450MPa, the tensile strength is >1300MPa, and the elongation is 12%; the total content of the impurities is ≤0.1%, wherein: P≤0.015 %, S≤0.008%, H≤0.003%, N≤0.006%, O≤30ppm;

[0031] The mass percentages of the lanthanide rare earth components are: cerium: 4%, europium: 5%, terbium: 10%, gadolinium: 15%, praseodymium: 12%, erbium: 15%, and the balance is lanthanum. The sum of the points is 100%.

[0032] The production process of the high-strength and high-toughness shelf column steel in this embodiment i...

Embodiment 2

[0039] In this embodiment, a high-strength and high-toughness shelf steel is used, and its chemical composition weight percentage is: C: 0.20%, Si: 1.3%, Mn: 2.1%, Nb: 0.07%, Al: 0.06%, Ti: 0.006% , B: 0.006%, Ni: 1.5%, lanthanide rare earth: 0.021-0.033%, the rest is Fe and unavoidable impurities; its microstructure is lath martensite and retained austenite, of which the retained austenite The volume percentage content is 11.5%; its -20°C impact energy is 40J, the yield strength is 1460MPa, the tensile strength is >1300MPa, and the elongation is 12.2%; the total content of the impurities is ≤0.1%, wherein: P≤ 0.015%, S≤0.008%, H≤0.003%, N≤0.006%, O≤30ppm;

[0040] The mass percentages of the lanthanide rare earth components are: cerium: 8%, europium: 6%, terbium: 11%, gadolinium: 18%, praseodymium: 14%, holmium: 2%, erbium: 16%, and the balance is Lanthanum, the sum of the above components is 100%.

[0041] The production process of the high-strength and high-toughness shel...

Embodiment 3

[0048] This embodiment is a high-strength and high-toughness steel for shelf columns, and its chemical composition weight percentage is: C: 0.50%, Si: 2.0%, Mn: 3.0%, Nb: 0.08%, Al: 0.08%, Ti: 0.007 %, B: 0.007%, Ni: 2.0%, lanthanide rare earth: 0.033%, the rest is Fe and unavoidable impurities; its microstructure is lath martensite and retained austenite, of which the retained austenite The volume percentage is 15.0%; the impact energy at -20°C is 48J, the yield strength is 1480MPa, the tensile strength is >1300MPa, and the elongation is 12.5%; the total content of the impurities is ≤0.1%, wherein: P≤0.015 %, S≤0.008%, H≤0.003%, N≤0.006%, O≤30ppm;

[0049] The mass percentages of the lanthanide rare earth components are: cerium: 11%, europium: 10%, terbium: 13%, gadolinium: 22%, praseodymium: 15%, holmium: 4%, erbium: 20%, and the balance is Lanthanum, the sum of the above components is 100%.

[0050] The production process of the high-strength and high-toughness shelf colu...

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Abstract

The invention discloses steel for a high-strength high-tenacity storage rack stand column. The steel comprises the following chemical components in percent by weight: 0.20-0.50% of C, 0.8-2.0% of Si, 1.5-3.0% of Mn, 0.02-0.08% of Al, 0.005-0.015% of Ti, 0.5-2.0% of Ni, 0.021-0.033% of lanthanide series rare earth, and the balance of Fe and unavoidable impurities, wherein the sum of Mn and Ni is 3.2-3.6%; the microstructures comprise lath martensite and retained austenite; the volume percentage composition of the retained austenite is 7.5-15.0%; the ballistic work of the steel at -20 DEG C is 38-48 J, the yield strength is 1,450-1,480 MPa, the tensile strength is greater than 1,300 MPa, and the ductility is 12-12.5%. The steel disclosed by the invention is good in corrosion resistance, cold workability and tenacity, meanwhile higher in tensile strength, and high in yield strength.

Description

technical field [0001] The invention relates to a high-strength, high-toughness steel and a production process thereof, in particular to a high-strength, high-toughness shelf steel and a production process thereof. Background technique [0002] Loading shelves are usually steel structures. For the storage needs of special materials, the use conditions and environment of the shelves are becoming more and more harsh, and the requirements for the thickness of the steel plates are getting thicker and thicker. Correspondingly, the technical requirements for the steel plates used for storage equipment are constantly increasing. improve. The development of stainless steel has a history of nearly 100 years. With the expansion of the use of stainless steel and the continuous increase of varieties, its performance is also expanding, and the requirements for quality of use are constantly improving. The current problem to be solved for stainless steel is how to solve the thermal stabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C21D8/00
Inventor 王正勇邢婷
Owner SUZHOU KESHENG STORAGE & LOGISTICS EQUIP
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