Effect of Heat Treatment in Pipe Processing Stage on Corrosion Resistance of Micro-Alloyed Steel Hot-Rolled Products

被引：0
|
作者：
I. G. Rodionova
A. V. Amezhnov
D. V. Kudashov
V. V. Naumenko
D. L. D’yakonov
N. A. Stukalova
N. A. Arutyunyan
机构：
[1] GNTs FGUP I. P. Bardin TsNIIchermet,Chemical Faculty
[2] AO Vyksa metallurgical Plant,undefined
[3] VF NTU MISiS,undefined
[4] National Research Technological University,undefined
[5] M. V. Lomonosov Moscow State University,undefined
来源：
Metallurgist | 2020年 / 64卷
关键词：
carbon and low alloy steels; oil industry pipelines; pipe heat treatment; corrosion resistance; microstructure; nanosize precipitation of excess of carbide (carbonitride) phases;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The effect of heat treatment on corrosion resistance of low-alloy pipe steels is investigated in relation to oilfield pipeline operating conditions. It is established that after pipe bulk heat treatment at 720 °C metal corrosion resistance increases, but at a lower temperature of 680 °C no significant change is detected. Analysis of the corresponding structural changes is performed and the main factors facilitating an increase in corrosion resistance are determined: cementite component spheroidization in the areas of pearlite or degenerated pearlite, and a reduction in dislocation density. The role of nanoscale precipitate type on pipe corrosion resistance is noted. It is established that at a higher processing temperature there is a larger fraction of ferritic precipitates. In contrast to interphase precipitates these particles do not adversely affect steel corrosion resistance.
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页码：322 / 333
页数：11
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