Economical hydrogen sulfide corrosion resistant pipeline steel and production method thereof

Abstract

The invention provides economical hydrogen sulfide corrosion resistant pipeline steel and a production method thereof. The economical hydrogen sulfide corrosion resistant pipeline steel comprises the following components: 0.030%-0.050% of C, 0.10%-0.30% of Si, 0.90%-1.10% of Mn, 0.020%-0.030% of Nb, 0.010%-0.020% of Ti, 0.020%-0.040% of Al, less than or equal to 0.0010% of S, less than or equal to 0.010% of P, less than or equal to 0.00012% of H, less than or equal to 0.005% of N and the balance Fe and inevitable impurity elements. Compared with the prior art, precious alloys such as Mo, V, Cr, Ni and Cu are not added to improve the H2S resistance of the material, the component design of low C, low Mn and ultralow P and S is adopted, trace microalloy elements such as Nb and Ti are added, and the TMCP process is combined, so that excellent mechanical properties and H2S resistance are obtained, and meanwhile, the production cost is reduced.

Description

technical field [0001] The invention relates to an anti-hydrogen sulfide corrosion pipeline steel and a production method thereof, in particular to an economical hydrogen sulfide anti-corrosion pipeline steel and a production method thereof. Background technique [0002] Pipeline transportation is still the most economical and safest way to transport oil and gas over long distances on a large scale. With the expansion of oilfield exploitation scope and the development of pipeline construction, H 2 Oil and gas resources in S acidic medium have also been developed, but oil and natural gas contain a small amount of H 2 S acidic medium has a certain corrosiveness to pipelines, causing sudden failure of pipelines and seriously affecting the safety of pipelines. Among them, hydrogen-induced cracking (HIC) and sulfide stress cracking (SSCC) are H 2 The main form of S corrosion. To prevent due to H 2 Cracking caused by S corrosion, the industry has developed a variety of anti-H ...

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Problems solved by technology

[0008] In the prior art disclosed above, low C and low Mn are adopted, and a certain amount of Nb, V, Cr and other micro-alloying elements are added to design, the alloy content is high, and the cost is high

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