Grade-90 chain steel

A chain and chemical composition technology, which is applied in the composition design of chain steel and 90-grade chain steel, can solve the problems of high alloy cost, poor market competitiveness, and high Ni alloy content, and achieve low alloy cost and raw material cost. The effect of reducing and reducing the Ni content

Inactive Publication Date: 2019-01-18
NANJING IRON & STEEL CO LTD
View PDF1 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both the national standard and the European standard use Mn+Cr+Ni+Mo to produce high-strength lifting chains, but this design has

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
  • Grade-90 chain steel
  • Grade-90 chain steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The grade 90 chain steel in this embodiment has the following chemical composition mass percentages: C: 0.22%, Si: 0.29%, Mn: 1.05%, P: 0.011%, S: 0.003%, Cu: 0.04%, Ni: 0.43% , Cr: 0.54%, Mo: 0.001%, Alt: 0.03%, and the balance is Fe and unavoidable impurities.

Embodiment 2

[0016] The grade 90 chain steel in this embodiment has the following chemical composition mass percentages: C: 0.22%, Si: 0.28%, Mn: 1.02%, P: 0.011%, S: 0.002%, Cu: 0.05%, Ni: 0.42% , Cr: 0.53%, Mo: 0.012%, Alt: 0.034%, and the balance is Fe and unavoidable impurities.

Embodiment 3

[0018] The grade 90 chain steel in this embodiment has the following chemical composition mass percentages: C: 0.22%, Si: 0.24%, Mn: 1.07%, P: 0.012%, S: 0.001%, Cu: 0.04%, Ni: 0.43% , Cr: 0.53%, Mo: ≤0.004%, Alt: 0.030%, and the balance is Fe and unavoidable impurities.

[0019] The 90 grades of chain steel breaking strength inspection results of the embodiment of the present invention 1-3 are as follows:

[0020]

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 relates to grade-90 chain steel. The grade-90 chain steel is prepared from the following chemical components by weight percent: 0.20 to 0.24 percent of C, 0.15 to 0.35 percent of Si, 0.90 to 1.30 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.020 percent of S, less than or equal to 0.20 percent of Cu, 0.40 to 0.55 percent of Ni, 0.45 to 0.65 percentof Cr, less than or equal to 0.10 percent of Mo, 0.025 to 0.050 percent of Alt, and the balance of Fe and unavoidable impurities. Compared with the brand number corresponding to the national standardand European standard, the grade-90 chain steel disclosed by the invention ahs the following advantages: (1) the contents of C and Mn are increased, the cost is slightly increased, and the strength and hardness of the material are greatly improved; (2) the content of Ni is reduced, no Mo element is added, and the cost is greatly reduced; and (3) by reasonably optimizing the alloy elements, on thepremise of ensuring the qualification of breaking strength of the material, the welding performance of the material is also considered, and the cost of raw materials are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy and processing, and relates to a composition design of a chain steel, in particular to a composition design of a 90-grade chain steel. Background technique [0002] Class 90 chains are designed with MnCrNi low-alloy steel, and the products are mainly used in high-standard manual hoists and electric hoists. Since the products are mostly used in the lifting industry, safety is of the utmost importance. Therefore, there are high requirements for the strength, toughness and deformation resistance of raw materials. At present, the widely used standards in China are the national standard GB / T 10560-2017 "Steel for Mining Welded Circular Link Chains" and the European Standard DIN 17115-2012. There are two technical standards, but there are no suitable grades in these two standards for the production of 90-grade chains. Both the national standard and the European standard use Mn+Cr+Ni...

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): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/06C22C38/40
CPCC22C38/02C22C38/04C22C38/06C22C38/40C22C38/42C22C38/44
Inventor 肖丙政王志强
Owner NANJING IRON & STEEL CO LTD
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