Steel for rubber belt steel wire having ultrahigh breaking force and production method

Abstract

The invention relates to steel for a rubber belt steel wire having an ultrahigh breaking force and a production method. The steel consists of the following elements: 0.89-0.94wt% of C, 0.20-0.45wt% of Mn, 0.15-0.25wt% of Cr, 0.20-0.40wt% of Si, less than or equal to 0.010wt% of P, 0.010wt% of S, 0.0-0.15wt% of V, 0.0015-0.0025wt% of total oxygen, less than or equal to 0.05wt% of Cu, and the balance Fe and unavoidable impurities. The steel has the advantages that by adding Mn, Cr and V to the steel, the strength of a coil rod is improved, and the looseness resistance of the wire rod is improved; by controlling components of top slag in a refining process, the content of trace elements is reduced, and the steel cleanness is improved; and by controlling the heating temperature of a steel blank, appropriate carbon-chromium compound particles are reserved, and the looseness resistance of the rubber belt steel wire made of the wire rod is improved.

Description

technical field [0001] The invention relates to a steel for steel wires of ultra-high breaking force belts and a production method thereof, belonging to the category of steel products for fine processing. Background technique [0002] With the development of industrial production, the demand for ultra-high-strength conveyor belts continues to increase. The steel wire strength of the ultra-high-strength conveyor belt has been developed from 2400MPa to 2600-2700MPa. Ultra-high-strength steel wire puts forward higher requirements on the chemical composition of the wire rod and the cleanliness of the steel. [0003] High-carbon steel wire for ultra-fine steel wire and its manufacturing method (patent No. CN200910060815.8) discloses a high-carbon steel wire for ultra-fine steel wire and its manufacturing method. The chemical composition in the wire is calculated by weight percentage as C: 0.60-1.2, Si: 0.10-0.50, Mn: 0.10-0.60, P≤0.020, S≤0.020, Ti≤0.002, Al≤0.005, N≤0.006, and...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned patent only introduces the chemical composition and manufacturing method of high-carbon steel wire for ultra-fine steel wire, but does not introduce the belt steel wire for ultra-high-strength transportation.

In particular, the above-mentioned patents do not consider the change in mechanical properties of ultra-high-strength steel wire after aging

Ultra-high-strength conveying tapes are subjected to high stress during use, and if there is relaxation, the conveying efficiency will be greatly reduced

Images