CN106148817A - A kind of production method of S355J2 wind-powered electricity generation steel - Google Patents

Abstract

The present invention provides the production method of a kind of S355J2 wind-powered electricity generation steel, and its chemical component weight degree is: C 0.15～0.18%, Si 0.25～0.45%, Mn 1.4～1.8%, P≤0.02%, S≤0.004%.Slab heating temperature 1150～1200 DEG C；Roughing temperature range 1000～1100 DEG C, road, roughing passage >=3, the first percentage pass reduction >=10%；Finish rolling start rolling temperature 870～930 DEG C, finishing temperature 800～880 DEG C, accumulative deformation rate >=60%；Steel plates straightening temperature 810～850 DEG C, enter cold bed air cooling after rectifying.The present invention can save the addition of noble metal Nb, V, Ti, makes a ton steel production cost be greatly lowered, and the S355J2 wind-powered electricity generation steel produced fully meets the requirement of EN10025-2 standard.

Description

A kind of production method of S355J2 wind-powered electricity generation steel

Technical field

The invention belongs to smelting process technical field, particularly to the production method of a kind of S355J2 wind-powered electricity generation steel.

Background technology

Domestic iron and steel enterprises is as one of high energy consumption industry, and energy consumption of unit product is than advanced international standard mean height About 20%, develop minimizing production technology, be favorably improved product quality and energy utilization rate, to greatest extent Reduce the energy-output ratio of product, reduce the discharge capacity of garbage.Meanwhile, current iron and steel enterprise manages and is absorbed in Predicament, develops minimizing production technology, sets up new growth engines, also become each iron and steel enterprise and dissolve danger The effective measures of machine.

At present, in Domestic Plate enterprise S355J2 wind-powered electricity generation product made from steel, all contain a certain amount of noble metal Nb, V, Ti, the addition of these noble metals improves the performance of steel plate, too increases the manufacturing cost of ton steel simultaneously.

Summary of the invention

It is desirable to provide one can save noble metal, reduce the life of the S355J2 wind-powered electricity generation steel of production cost Product method.

To this end, the solution that the present invention is taked is:

A kind of production method of S355J2 wind-powered electricity generation steel, it is characterised in that:

(1) chemical composition mass percentage content is: C 0.15～0.18%, Si 0.25～0.45%, Mn 1.4～ 1.8%, P≤0.02%, S≤0.004%, remaining for Fe with trace impurity；

(2) heating-up temperature is 1150～1200 DEG C；

(3) roughing temperature range 1000～1100 DEG C, road, roughing passage >=3, the first percentage pass reduction >=10%；

(4) finish rolling start rolling temperature 870～930 DEG C, finishing temperature 800～880 DEG C, the finish rolling stage uses big Drafts, accumulative deformation rate >=60%；

(5) it is directly entered thermal straightening machine, straightening temperature 810～850 DEG C after steel plate goes out finishing mill, enters after rectifying Cold bed air cooling.

The invention have the benefit that

1, the present invention can save the addition of noble metal Nb, V, Ti, makes a ton steel production cost be greatly lowered；

2, the S355J2 wind-powered electricity generation steel that the present invention produces fully meets the requirement of EN10025-2 standard.

Detailed description of the invention

Embodiment rolling mill practice flow process is heating-de-scaling-roughing-finish rolling-aligning-shearing-cold bed air cooling-warehouse-in.

Embodiment 1:

Chemical composition mass percentage content is: C 0.17%, Si 0.40%, Mn 1.5%, P≤0.02%, S ≤ 0.004%, remaining for Fe with trace impurity.

Heating-up temperature is 1170 DEG C；Roughing temperature range 1030～1100 DEG C, roughing passage is 3 roads, first Percentage pass reduction 22%.Finish rolling start rolling temperature 900 DEG C, finishing temperature 840 DEG C, the finish rolling stage uses depresses greatly Amount, accumulative deformation rate 63%；Steel plate is directly entered thermal straightening machine, straightening temperature 830 DEG C after going out finishing mill, rectify Rear entrance cold bed air cooling.

Embodiment 2:

Chemical composition mass percentage content is: C 0.16%, Si 0.35%, Mn 1.7%, P≤0.02%, S ≤ 0.004%, remaining for Fe with trace impurity.

Heating-up temperature is 1190 DEG C；Roughing temperature range 1030～1100 DEG C, roughing passage is 5 roads, first Percentage pass reduction 18%.Finish rolling start rolling temperature 920 DEG C, finishing temperature 860 DEG C, the finish rolling stage uses depresses greatly Amount, accumulative deformation rate 66%；Steel plate is directly entered thermal straightening machine, straightening temperature 840 DEG C after going out finishing mill, rectify Rear entrance cold bed air cooling.

Claims (1)

1. the production method of a S355J2 wind-powered electricity generation steel, it is characterised in that:

(1) chemical composition mass percentage content is: C 0.15～0.18%, Si 0.25～0.45%, Mn 1.4～ 1.8%, P≤0.02%, S≤0.004%, remaining for Fe with trace impurity；

(2) heating-up temperature is 1150～1200 DEG C；

(3) roughing temperature range 1000～1100 DEG C, road, roughing passage >=3, the first percentage pass reduction >=10%；

(4) finish rolling start rolling temperature 870～930 DEG C, finishing temperature 800～880 DEG C, the finish rolling stage uses big Drafts, accumulative deformation rate >=60%；

(5) it is directly entered thermal straightening machine, straightening temperature 800～850 DEG C after steel plate goes out finishing mill, enters after rectifying Cold bed air cooling.