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Super-low-carbon steel containing trace tin element and having high strength, corrosion resistance and easy molding and preparation method thereof

An ultra-low carbon steel, high-strength technology, applied in the field of metal materials, can solve problems such as poor stamping performance, cracking, and easy thinning, and achieve the effects of simple operation, simple production process, good deep drawing and complex forming performance.

Inactive Publication Date: 2014-10-29
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] It can be seen from (4) that the larger the r value, the stronger the thinning resistance and the better the deep drawing performance of the sheet during auxetic forming; the smaller the r value, the easier it is for the material to become thinner in the thickness direction during deformation, and it is easier to Cause cracking phenomenon, poor stamping performance

Method used

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  • Super-low-carbon steel containing trace tin element and having high strength, corrosion resistance and easy molding and preparation method thereof
  • Super-low-carbon steel containing trace tin element and having high strength, corrosion resistance and easy molding and preparation method thereof
  • Super-low-carbon steel containing trace tin element and having high strength, corrosion resistance and easy molding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1: An ultra-low carbon steel plate containing trace tin elements, high strength, corrosion resistance and easy formability, the composition of the steel plate is as follows, all in mass percentage: C: 0.001%, N: 0.003%, Mn: 0.3% , Cr: 0.8%, Mo: 0.1, Si: 0.2%, Al: 0.005%, Mg: 0.0015%, Ca: 0.0015%, Sn: 0.01%, Nb: 0.2%, Cu: 0.25%, Ti: 0.01%, P: 0.010%, S: 0.003%, the rest is Fe;

[0065] The preparation method of above-mentioned ultra-low carbon steel plate, it comprises the following steps:

[0066] S1. Smelting: With carbon content ≤ 0.0218%, industrial pure iron with a purity of 99.8% to 99.9%, a purity of 99.5% chromium, a purity of 99.5% tin, a purity of 99.5% manganese, and ferrosilicon alloys as raw materials, calcium oxide crucibles are used In a vacuum of 1×10 -3 It is smelted in a Pa vacuum induction furnace. The smelting process adopts two refining methods. The first refining temperature is 1550 ° C, and the refining time is 30 minutes. The second refi...

Embodiment 2

[0098] Example 2: An ultra-low carbon steel plate containing trace tin elements, high strength, corrosion resistance and easy forming, the composition of the steel plate is as follows, all in mass percentage: C: 0.005%, N: 0.002%, Mn: 0.1% , Cr: 1.50%, Mo: 0.06, Si: 0.1%, Al: 0.01%, Mg: 0.001%, Ca: 0.0001%, Sn: 0.30%, Nb: 0.08%, Cu: 0.05%, Ti: 0.2%, P: 0.005%, S: 0.002%, the rest is Fe;

[0099] The preparation method of above-mentioned ultra-low carbon steel plate, it comprises the following steps:

[0100] S1. Smelting: With carbon content ≤ 0.0218%, industrial pure iron with a purity of 99.8% to 99.9%, a purity of 99.5% chromium, a purity of 99.5% tin, a purity of 99.5% manganese, and ferrosilicon alloys as raw materials, calcium oxide crucibles are used In a vacuum of 1×10 -4 The smelting process is carried out in a vacuum induction furnace of Pa. The smelting process adopts two refining methods, the first refining temperature is 1600 ℃, the refining time is 50 minutes, ...

Embodiment 3

[0111] Example 3: An ultra-low carbon steel plate containing trace tin elements, high strength, corrosion resistance and easy forming, the composition of the steel plate is as follows, all in mass percentage: C: 0.003%, N: 0.001%, Mn: 0.5% , Cr: 1%, Mo: 0.01%, Si: 0.5%, Al: 0.008%, Mg: 0.0001%, Ca: 0.0015%, Sn: 0.2%, Nb: 0.01%, Cu: 0.3%, Ti: 0.1% , P: 0.001%, S: 0.001%, the rest is Fe;

[0112] The preparation method of above-mentioned ultra-low carbon steel plate, it comprises the following steps:

[0113] S1. Smelting: With carbon content ≤ 0.0218%, industrial pure iron with a purity of 99.8% to 99.9%, a purity of 99.5% chromium, a purity of 99.5% tin, a purity of 99.5% manganese, and ferrosilicon alloys as raw materials, calcium oxide crucibles are used In a vacuum of 0.5×10 -4 It is smelted in a Pa vacuum induction furnace. The smelting process adopts two refining methods. The first refining temperature is 1580°C, and the refining time is 35 minutes. The second refining ...

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Abstract

The invention discloses super-low-carbon steel containing a trace tin element and having high strength, corrosion resistance and easy molding. The super-low-carbon steel comprises the chemical composition by the mass percentage: 0.001-0.005% of C, 0.001-0.003% of N, 0.1-0.5% of Mn, 0.8-1.50% of Cr, 0.01-0.1% of Mo, 0.1-0.5% of Si, 0.005-0.01% of Al, 0.0001-0.0015% of Mg, 0.0001-0.0015% of Ca, 0.01-0.30% of Sn, 0.01-0.2% of Nb, 0.05-0.3% of Cu, 0.01-0.2% of Ti, 0.001-0.010% of P, not more than 0.003% of S, and the balance Fe. The steel material is prepared by smelting in an induction heating vacuum furnace, ingot casting, hot rolling, pickling and cold rolling, crystallization and annealing, and rolling, wherein the steel material contains trace tin, is low in carbon content and high in strength, has excellent complex workpiece forming performance and resistance to corrosion of oilfield produced water and other aqueous solution, and can be safely used in oil and gas field complex drilling and well completion and other environments; and the method is reliable in principle, simple in production process, convenient to operate, and high in practicality.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a steel with corrosion resistance, high strength and high formability that needs to work in a water-based medium in the modern industrial field and a preparation method thereof, especially in the oil and gas industry that involves complex drilling. Pipes and high-level branch well bifurcation devices and other workpiece steels that require corrosion resistance, high strength, and high formability and their preparation methods. Background technique [0002] IF (Interstitial-Free) steel, also known as interstitial-free steel, is the third generation of deep-drawing steel, which was produced after the 1980s. The characteristics of IF steel are: the carbon content is very low, after adding Ti and Nb, the C and N compounds of Ti and Nb are formed. Because there are no interstitial atoms in the steel, it has excellent deep drawing performance, high plastic strain ratio, high elongation, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/28C22C33/04
Inventor 李春福张凤春童丽华张丛雷邓治国肖淇申文竹杨世洲
Owner SOUTHWEST PETROLEUM UNIV