Unlock instant, AI-driven research and patent intelligence for your innovation.

Cold rolled steel plate and preparation method of cold rolled steel plate as well as hot-dip aluminum-zinc alloy steel plate and preparation method of hot-dip aluminum-zinc alloy steel plate

A cold-rolled steel plate and hot-dip aluminum technology, which is applied in hot-dip plating process, metal material coating process, coating and other directions, can solve problems such as low strength, and achieve the effect of low cost and excellent market prospects.

Active Publication Date: 2014-08-20
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to overcome the defect of low strength of the existing aluminum-zinc alloy steel plate, to provide a hot-dip aluminum-zinc alloy steel plate with low cost, high strength and good surface quality and its preparation method, and for the preparation of Cold-rolled steel sheet of hot-dip aluminum-zinc alloy steel sheet of the present invention and preparation method thereof

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
  • Cold rolled steel plate and preparation method of cold rolled steel plate as well as hot-dip aluminum-zinc alloy steel plate and preparation method of hot-dip aluminum-zinc alloy steel plate
  • Cold rolled steel plate and preparation method of cold rolled steel plate as well as hot-dip aluminum-zinc alloy steel plate and preparation method of hot-dip aluminum-zinc alloy steel plate

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The preparation method of the cold-rolled steel plate provided by the present invention comprises: hot-rolling, coiling, cold-rolling, and annealing the slab sequentially, wherein, the coiling temperature is 570-630° C.; the reduction rate of the cold-rolling is 75-85%; the annealing conditions include: the temperature is 630-680°C, and the time is 30-70s; the composition of the slab is: C: 0.01-0.08% by weight, Si: ≤0.05% by weight, Mn: 0.1-0.4% by weight, P: ≤0.025% by weight, S: ≤0.02% by weight, Nb: 0.01-0.05% by weight, Al: 0.02-0.08% by weight, and the balance is Fe and unavoidable impurities.

[0017] In the present invention, although when the composition of the slab is within the above-mentioned range, cold-rolled steel sheets with better strength and hot-dip aluminum-zinc alloy steel sheets with better strength and surface quality can be obtained from the cold-rolled steel sheets, but In order to enhance the performance of the obtained cold-rolled steel sheet ...

Embodiment 1

[0050] This embodiment is used to illustrate the cold-rolled steel sheet and its preparation method, and the hot-dip aluminum-zinc alloy steel sheet and its preparation method of the present invention.

[0051] The slab (thickness: 200 mm) of the present invention was obtained by smelting in a converter, Ca treatment in an LF furnace, decarburization by RH and continuous casting, and its composition is shown in Table 1. The slab is heated to 1229°C for rough rolling, the finishing temperature of the rough rolling is 1160°C, the thickness of the rough-rolled intermediate slab is 32.9mm, and the rough-rolled intermediate slab is coiled by a hot coil box, Then carry out finish rolling, the start rolling temperature of finish rolling is 1115°C, the finish rolling temperature of finish rolling is 840°C, the thickness of the middle slab after finish rolling is 2.5mm; then it is cooled to 585°C at a cooling rate of 25°C / s Coiling at ℃; then cold rolling to a thickness of 0.5mm at a r...

Embodiment 2

[0053] This embodiment is used to illustrate the cold-rolled steel sheet and its preparation method, and the hot-dip aluminum-zinc alloy steel sheet and its preparation method of the present invention.

[0054] The slab (thickness: 200 mm) of the present invention was obtained by smelting in a converter, Ca treatment in an LF furnace, decarburization by RH and continuous casting, and its composition is shown in Table 1. The slab is heated to 1235°C for rough rolling, the finishing temperature of the rough rolling is 1188°C, the thickness of the rough-rolled intermediate slab is 33.6mm, and the rough-rolled intermediate slab is coiled by a hot coil box, Then finish rolling, the start rolling temperature of finish rolling is 1155°C, the finish rolling temperature is 875°C, the thickness of the intermediate slab after finish rolling is 2.5mm; then cooled to 620°C at a cooling rate of 30°C / s Coiling at ℃; then cold rolling to a thickness of 0.55 mm at a reduction rate of 78% on a ...

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

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention provides a hot-dip aluminum-zinc alloy steel plate which is low in cost, high in strength and good in surface quality, and a preparation method of the hot-dip aluminum-zinc alloy steel plate, as well as a cold rolled steel plate for preparing the hot-dip aluminum-zinc alloy steel plate, and a preparation method of the cold rolled steel plate. The preparation method of the cold rolled steel plate comprises the following steps: hotly rolling, winding, coldly rolling and annealing a plate blank in sequence, wherein the winding temperature is 570-630 DEG C; the cold rolled reduction rate is 75%-85%; the annealing conditions are as follows: the temperature is 630-680 DEG C and the time is 30-70 seconds; the plate blank comprises the following components by weight percent: 0.01%-0.08% of C, 0.05% of Si, 0.1%-0.4% of Mn, not more than 0.025% of P, not more than 0.02% of S, 0.01%-0.05% of Nb, 0.02%-0.08% of Al and the balance of Fe and inevitable impurities.

Description

technical field [0001] The invention relates to a cold-rolled steel plate and a preparation method thereof, as well as a hot-dip aluminum-zinc alloy steel plate prepared from the cold-rolled steel plate and a preparation method thereof. Background technique [0002] In recent years, with the continuous requirements for energy saving, emission reduction, energy consumption reduction, and improvement of product stability and safety, hot-dip galvanized sheets for building structures and household appliances have also developed towards high strength and high surface quality. [0003] CN101352946A discloses a deep-drawing hot-dip galvalume steel sheet / strip and a production method thereof. Its substrate composition (wt%) is C≤0.01, Si≤0.12, Mn≤0.6, P≤0.1, S≤0.045, Ti≤0.3, and the balance is Fe and unavoidable impurities; through degreasing treatment, annealing treatment and thermal Plating, the yield strength of the finished product reaches 140-220MPa, and the tensile strength r...

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): C21D8/02C22C38/12C23C2/06
Inventor 王敏莉郑之旺董君张功庭岳安宏余灿生付佑春于秀
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP