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

Fresh-water corrosion resistant steel for U-shaped steel sheet pile and method for producing same

A technology of resistance to fresh water and steel sheet piles, applied in metal rolling, temperature control, manufacturing converters, etc., to achieve the effect of good resistance to fresh water corrosion, favorable for promotion, and strong durability

Inactive Publication Date: 2010-09-29
武钢集团有限公司
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the present invention, the disclosed patents at home and abroad did not involve the problem of fresh water corrosion

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Freshwater corrosion-resistant steel for hot-rolled U-shaped steel sheet piles, its chemical composition and weight percentage are: C 0.10%, Mn 0.80%, Si 0.10%, P 0.022%, S≤0.02%, lanthanide elements 0.01%, and the rest Fe and unavoidable impurities.

[0028] A method for producing steel for freshwater corrosion-resistant hot-rolled U-shaped steel sheet piles, the steps of which are:

[0029] 1) Smelting: control the tapping temperature at 1645-1650°C;

[0030] 2) Carry out converter refining: control its refining time at 15 minutes; when 20 minutes after the start of converter refining, add Al block at a time according to 5 kg / ton of steel;

[0031] 3) Continuous casting: control the casting temperature at 1570-1575°C, and keep electromagnetic stirring;

[0032] 4) Heating the continuous casting slab to 1150-1170°C;

[0033] 5) Rolling: control the rolling start temperature at 1120-1130°C, and control the finishing rolling temperature at 850-860°C.

Embodiment 2

[0035] Freshwater corrosion-resistant steel for hot-rolled U-shaped steel sheet piles, its chemical composition and weight percentage are: C 0.18%, Mn 0.95%, Si 0.14%, P 0.03%, S≤0.02%, lanthanide elements 0.02%, and the rest Fe and unavoidable impurities.

[0036] A method for producing steel for freshwater corrosion-resistant hot-rolled U-shaped steel sheet piles, the steps of which are:

[0037] 1) Smelting: control the tapping temperature at 1650-1655°C;

[0038] 2) Carry out converter refining: control its refining time at 20 minutes; when 25 minutes after the start of converter refining, add Al block at a time according to 6.5 kg / ton of steel;

[0039] 3) Carry out continuous casting: control the casting temperature at 1572-1578°C, and keep electromagnetic stirring all the time;

[0040] 4) Heating the continuous casting slab to 1185-1190°C;

[0041] 5) Rolling: control the rolling start temperature at 1150-1165°C, and control the finishing rolling temperature at 880-...

Embodiment 3

[0043] Freshwater corrosion-resistant steel for hot-rolled U-shaped steel sheet piles, its chemical composition and weight percentage are: C 0.23%, Mn 1.2%, Si 0.18%, P 0.10%, S≤0.02%, lanthanide elements 0.08%, and the rest Fe and unavoidable impurities.

[0044] A method for producing steel for freshwater corrosion-resistant hot-rolled U-shaped steel sheet piles, the steps of which are:

[0045] 1) Smelting: control the tapping temperature at 1655-1660°C;

[0046] 2) Carry out converter refining: control its refining time at 32 minutes; 28 minutes after the start of converter refining, add Al block at a time according to 7.5 kg / ton of steel;

[0047] 3) Carry out continuous casting: control the casting temperature at 1575-1580°C, and keep electromagnetic stirring all the time;

[0048] 4) Heating the continuous casting slab to 1195-1230°C;

[0049] 5) Rolling: control the rolling start temperature at 1180-1195°C, and control the finishing rolling temperature at 900-910°C....

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 fresh-water corrosion resistant steel for a U-shaped steel sheet pile and a method for producing the same. The fresh-water corrosion resistant steel for the U-shaped steel sheet pile comprises the following chemical components by weigh percent: 0.10-0.30 percent of C, 0.80-1.80 percent of Mn, 0.10-0.245 percent of Si, 0.022-0.15 percent of P, 0.02 percent of S or more, 0.01-0.15 percent of lanthanide and the balance of Fe and inevitable impurities. The method for producing the fresh-water corrosion resistant steel for the U-shaped steel sheet pile comprises the following steps: smelting the steel; refining the steel with a convertor for 15-45 min; adding an A1 block after refining the steel for 20-30 min; continuously casting the steel at 1570-1585 DEG C and stirring; heating a cast blank to 1150-1300 DEG C; and rolling the cast blank by controlling the start rolling temperature at 1120-1250 DEG C and the finish rolling temperature at 850-980 DEG C. The fresh-water corrosion resistant steel for the U-shaped steel sheet pile can well resist the corrosion of fresh water of lake, river and the like, is reusable and can be produced with simple process.

Description

technical field [0001] The invention relates to steel for steel sheet piles and a production method thereof, in particular to steel for hot-rolled U-shaped steel sheet piles resistant to fresh water corrosion and a production method thereof. Background technique [0002] As a new type of environmentally friendly construction steel, steel sheet piles are widely used abroad in projects such as wharves, embankment protection banks, retaining walls, docks, flow breaks, and bridge cofferdams. The basic structure of the steel sheet pile: one is the steel sheet pile, the other is the joint structure on both sides, and the third is to form the wall in the ground or in the water. Due to its special structure, it has unique advantages: high strength, light weight, and good water-proof performance; strong durability, with a service life of 20-50 years; reusable, generally 3-5 times; remarkable environmental protection effect, During construction, it can greatly reduce the amount of so...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C21C5/28B22D11/115B21B1/46B21B37/74
Inventor 任安超吉玉李立军韩斌欧阳标朱敏周剑华
Owner 武钢集团有限公司