Low-cost high-strength steel plate for engineering machinery, and production method thereof

A technology for construction machinery and production methods, which is applied in the field of low-cost and high-strength construction machinery steel plates and their production, can solve problems such as affecting the production profits of enterprises and high production costs, achieve excellent comprehensive mechanical properties, and solve the problem of coarse grains. Uneven, low production cost effect

Inactive Publication Date: 2015-08-12
HEBEI IRON AND STEEL
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes how it works well when producing strong materials with lower costs compared to traditional methods like casting or machining processes. It achieves this by controlling both the addition of certain substances during manufacturing while also reducing the formation of unwanted phases called secondary carborides. By doing these steps, the material becomes stronger without requiring extra ingredients beyond what was previously needed. Additionally, the resulting steel sheet exhibits better balance between tensile strength and work life time due to its unique microstructure formed from fine particles dispersed throughout martensites create. Overall, this new technique simplifies the way we produce advanced alloys used in industries.

Problems solved by technology

The technical issue addressed in this patented text relating to producing strong industrial machine components made from advanced materials like martensitic steels with added amounts of expensive metal content has been finding ways to improve their properties while reducing costs associated therewith.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: The composition ratio and production process of the low-cost high-strength steel plate for construction machinery are as follows.

[0030] The mass percentage of the chemical composition of the steel plate is: C 0.17%, Si 0.3%, Mn 1.3%, P 0.007%, S 0.004%, Ni 0.6%, Cr 0.5%, Nb 0.03%, Al 0.02%, Mo 0.40%, Ti 0.028%, B 0.003%, the balance is Fe and unavoidable impurities; the thickness of the steel plate is 80mm.

[0031] The processing step of this steel plate production method is as follows:

[0032] (1) Smelting process: the molten steel is smelted in a vacuum induction furnace first, and the order of adding aluminum-titanium-boron alloy elements is as follows: first add aluminum for deoxidation, then add titanium to fix nitrogen, and add boron before the molten steel is released to ensure that the molten steel contains 0.003% boron content.

[0033] (2) Casting process, casting molten steel after smelting into a billet (steel billet) at a casting temperatu

Embodiment 2

[0038] Embodiment 2: The composition ratio and production process of the low-cost high-strength steel plate for construction machinery are as follows.

[0039] The mass percentage of the chemical composition of the steel plate is: C 0.16%, Si 0.35%, Mn 1.4%, P 0.009%, S 0.005%, Ni 0.4%, Cr 0.4%, Nb 0.02%, Al 0.06%, Mo 0.37%, Ti 0.016%, B 0.0022%, the balance is Fe and unavoidable impurities; the thickness of the steel plate is 80mm.

[0040] The processing step of this steel plate production method is as follows:

[0041] (1) Smelting process: the molten steel is smelted in a vacuum induction furnace first, and the order of adding aluminum-titanium-boron alloy elements is as follows: first add aluminum for deoxidation, then add titanium to fix nitrogen, and add boron before the molten steel is released to ensure that the molten steel contains 0.0022% boron content.

[0042] (2) Casting process, casting molten steel after smelting into a billet (steel billet) at a casting temper

Embodiment 3

[0047] Embodiment 3: The composition ratio and production process of the low-cost high-strength steel plate for construction machinery are as follows.

[0048] The mass percentage of the chemical composition of the steel plate is: C 0.18%, Si 0.37%, Mn 1.0%, P 0.012%, S 0.009%, Ni 0.5%, Cr 0.3%, Nb 0.02%, Al 0.04%, Mo 0.34%, Ti 0.010%, B 0.0016%, the balance is Fe and unavoidable impurities; the thickness of the steel plate is 80mm.

[0049] The processing step of this steel plate production method is as follows:

[0050] (1) Smelting process: the molten steel is smelted in a vacuum induction furnace first, and the order of adding aluminum-titanium-boron alloy elements is as follows: first add aluminum for deoxidation, then add titanium to fix nitrogen, and add boron before the molten steel is released to ensure that the molten steel contains 0.0016% boron content.

[0051] (2) Casting process, casting molten steel after smelting into a billet (steel billet) at a casting temper

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Yield strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a low-cost high-strength steel plate for engineering machinery, and a production method thereof. The steel plate comprises, by mass, 0.16-0.18% of C, 0.3-0.4% of Si, 1.0-1.4% of Mn, 0.016% or less of P, 0.009% or less of S, 0.4-0.7% of Ni, 0.3-0.5% of Cr, 0.01-0.03% of Nb, 0.02-0.06% of Al, 0.30-0.40% of Mo, 0.010-0.030% of Ti, 0.0016-0.0030% of B, and the balance of Fe and inevitable impurities. The components of the steel plate produced through the method are reasonably designed, and a proper amount of boron element is added to reduce the use amount of alloy elements, so the production cost is low; a two-stage controlled rolling technology is adopted to solve coarse and uneven crystal grains due to common hot rolling, so the produced steel plate has excellent comprehensive mechanical performances and uniform rolled structure, and provides a uniform original structure for subsequent heat treatment; an offline quenching heat treatment technology is adopted to make the steel plate have a martensite structure, so the strength grade of the steel plate is improved, and the plate shape of the steel plate is good; and a tempering heat treatment technology is adopted to eliminate the internal stress of the steel plate, so the low temperature toughness of the steel plate is improved, and the structure of the steel plate is uniform.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Owner HEBEI IRON AND STEEL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap