Ultra-thin ammonia corrosion resisting moving pressure container steel plate and production method thereof

Abstract

The invention discloses an ultra-thin ammonia corrosion resisting moving pressure container steel plate and a preparing method thereof. Steel comprises following chemical components including, by masspercent, smaller than or equal to 0.23% of C, 0.31%-0.68% of Si, 0.71%-1.35% of Mn, smaller than or equal to 0.008% of P, smaller than or equal to 0.003% of S, 0.51%-1.55% of Al, smaller than or equal to 0.02% of W, 0.04%-0.13% of V, 0.0007%-0.0013% of B, smaller than or equal to 0.10% of Ce and the balance Fe and other inevitable inclusions. Through adding of a small amount of Al, W, the V microalloy element and the rare earth element Ce, steel ball inclusions are effectively purified, and grains are purified; through combination of the alloy elements, hydrogen and nitrogen, obvious hydrogenand nitrogen corrosion resisting performance is achieved; and through rolling technology parameter optimization and the proper heat treatment technology, the steel has good strength, low-temperaturetenacity and ammonia corrosion resisting performance, technology parameters are easy to control, cost is low, efficiency is high, and the ultra-thin ammonia corrosion resisting moving pressure container steel plate is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of iron and steel materials, in particular to an ultra-thin steel plate for ammonia corrosion-resistant mobile pressure vessels and a production method thereof. Background technique [0002] Most of the media stored and transported by mobile pressure vessels are flammable, explosive and harmful liquefied gases, cryogenic liquids and permanent gases, such as ethylene oxide, liquid oxygen, liquid ammonia, liquid hydrogen, liquefied natural gas and compressed natural gas, ammonia Gas etc. Mobile pressure vessels for storing ammonia are usually used on tank trucks, trucks or container vehicles for transporting ammonia gas or liquid ammonia. With the development of mobile pressure vessels towards safety, longevity and large-scale, at the same time, in order to save energy and reduce emissions, reduce CO 2 The discharge volume requires that the size and specification of steel plates for mobile pressure vessels a...

AI Technical Summary

Problems solved by technology

However, this patent document only focuses on hydrogen corrosion resistance, and also has the problem of poor ammonia corrosion resistance.

[0007] Since none of the technical solutions disclosed in the prior art is specifically researched on the steel used in the ammonia environment, a mobile pressure vessel with good ammonia corrosion resistance and thin tank thickness is specially developed for the ammonia environment. The steel plate and its preparation method are particularly important for improving the safety of mobile pressure vessels storing ammonia

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