60-steel hot rolling coil rod with high strength and high plasticity and production method thereof

Abstract

A 60-steel hot rolling coil rod with high strength and high plasticity and production method thereof belong to the hot rolling coil rod and production method thereof. The coil rod consists of the following chemical substances by weight percentage (%): 0.57-0.65 % of C, 0.17-0.37 % of Si, 0.50-0.80 % of Mn, 0.16-0.25 % of Cr, <= 0.35 % of P, <= 0.035 % of S, <= 0.30 % of Ni, <= 0.25 % of Cu, and the balance of Fe. The hot rolling coil rod with Phi 6.5 mm has a tensile strength of 990-1060 Mpa, a reduction of area of 50-60 % and a Sorbit rate of 85-90 %. The coil rod and the production method thereof have advantages that the process equipment and parameter setting are reasonable, the long-standing problem is solved, the product quality is improved, the deep processing of the coil rod is easy, a thinner steel wire product is easily drawn, the load that the steel strand processed with the steel wire can bear is substantially increased, the reduction of area of the steel wire is improved, the intermediate thermal treatment process is omitted and the energy is saved.

Description

technical field [0001] The invention belongs to hot-rolled wire rods, in particular to a high-strength and high-plasticity 60-steel hot-rolled wire rod for producing steel strands and steel wire products and a production method thereof. Background technique [0002] 60 steel hot-rolled wire rod is widely used in the metal products industry to produce steel strands and wire products. Generally, it needs to be drawn through multiple passes, and the area reduction rate can reach up to about 97%. With the improvement of users' performance requirements for steel strands and steel wire products, higher requirements are put forward for the strength, area shrinkage, repeated bending and torsion performance of 60 steel hot-rolled wire rods. The invention patent of "High Carbon Steel Wire Rod Production Technology" (Application No.: 200510013337.7) disclosed by the China Intellectual Property Office adopts the process of directly rolling a small round continuous casting slab with a di...

AI Technical Summary

Problems solved by technology

Although the upper limit of chromium content is specified in the standard, chromium is not added in actual production, because the wire rod produced by the normal 60 steel controlled rolling and controlled cooling process after adding chromium to 60 steel, the strength increases and the plasticity decreases, and the user draws the wire rod during the drawing process. Brittle fracture occurs and even the wire rod is brittle during bundling

Therefore, the chromium-free 60 steel wire rod is usually produced by converter smelting, LF furnace refining, billet continuous casting, high-speed rolling mill rolling, and controlled cooling process. The tensile strength is 930MPa, the area reduction rate is 40%, and the Soxhlet The integration rate is 75%, which cannot meet the high requirements of users

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