Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Super-high-strength steel Q960D for engineering machinery and production method of super-high-strength steel Q960D

A technology of construction machinery and production methods, applied in the direction of improving process efficiency, etc., can solve the problems of high process cost and high selling price, achieve low production cost and ensure the effect of mechanical properties

Active Publication Date: 2016-11-09
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
View PDF3 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic construction machinery manufacturers mainly use Q960D steel plates imported from abroad, and the product price is relatively high. However, domestic manufacturers with production capacity of such products, such as Wuyang Steel Plant, mainly use quenching and tempering process for product production, and the process cost is relatively high.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Super-high-strength steel Q960D for engineering machinery and production method of super-high-strength steel Q960D
  • Super-high-strength steel Q960D for engineering machinery and production method of super-high-strength steel Q960D
  • Super-high-strength steel Q960D for engineering machinery and production method of super-high-strength steel Q960D

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention is an ultra-high-strength engineering machinery steel Q960D, the mass percentage of each element in the steel is: C: 0.13-0.16, Mn: 1.40-1.50, Nb: 0.02-0.04, V: 0.09-0.11, Ti: 0.015-0.025 , Cr: 0.45~0.55, Mo: 0.45~0.55, B: 0.0008~0.003, Als≥0.03, others are Fe and unavoidable residual elements and impurities in the production process.

[0035] A production method for ultra-high-strength construction machinery steel Q960D, which adopts the process steps of molten iron pre-desulfurization, converter smelting, LF refining, RH refining, continuous casting, controlled rolling, DQ+ACC cooling, and tempering heat treatment, wherein:

[0036] The converter smelting process controls the tapping carbon C to ≤0.04%, the sliding plate blocks the slag, and controls the amount of slag falling below 0.01% of the molten steel to ensure the cleanliness of the molten steel;

[0037] The LF refining process uses lime, aluminum wire, etc. to make white slag for desulf...

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

No PUM Login to View More

Abstract

The invention discloses super-high-strength steel Q960D for engineering machinery and a production method of the super-high-strength steel Q960D. The steel comprises, by mass percentage, 0.13-0.16% of C, 1.40-1.50% of Mn, 0.02-0.04% of Nb, 0.09-0.11% of V, 0.015-0.025% of Ti, 0.45-0.55% of Cr, 0.45-0.55% of Mo, 0.0008-0.003% of B, greater than or equal to 0.03% of Als and the balance Fe and unavoidable residual elements and impurities generated in the production process. According to the super-high-strength steel Q960D and the production method thereof, an LF+RH process is adopted for guaranteeing cleanliness of the steel, and it is guaranteed that internal quality of a steel plate meets the flaw detection requirements; a controlled rolling+(DQ+ACC) cooling + tempering process is adopted for refining grains, low production cost is guaranteed, and meanwhile, the super-high-strength steel Q960D for the engineering machinery is produced; and mechanical performance and internal quality meet the requirements of GB / T16270-2009.

Description

technical field [0001] The invention relates to a production method of steel, in particular to an ultra-high-strength engineering machinery steel Q960D and a production method thereof. Background technique [0002] Q960D is the steel grade with the highest strength level in GB / T16270-2009, and it is mainly used in the field of construction machinery such as excavators and cranes. At present, domestic construction machinery manufacturers mainly use Q960D steel plates imported from abroad, and the product price is relatively high. However, domestic manufacturers with production capacity of such products, such as Wuyang Steel Plant, mainly use quenching and tempering process for product production, and the process cost is relatively high. . The national standard GB / T16270-2009 limits the thickness specification of Q960D to ≤50mm. Due to the limitation of the processing capacity of domestic machining users, the largest demand for Q960D in the market is the product with a thickn...

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
IPC IPC(8): C22C38/04C22C38/12C22C38/14C22C38/18C22C38/32C22C38/06C21C7/10C21D8/02
CPCC21C7/10C21D8/0226C21D8/0247C21D2211/002C21D2211/005C22C38/04C22C38/06C22C38/12C22C38/14C22C38/18C22C38/32Y02P10/20
Inventor 贾国生李玉谦杨雄范佳马友辉许伟杜琦铭梅东贵
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com