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热处理对16Cr5NiMo超级马氏体不锈钢应力腐蚀开裂和氢脆敏感性的影响

Influence of Thermal Treatment on SCC and HE Susceptibility of Supermartensitic Stainless Steel 16Cr5NiMo.

作者信息

Bacchi Linda, Biagini Fabio, Corsinovi Serena, Romanelli Marco, Villa Michele, Valentini Renzo

机构信息

Letomec srl, 56126 Pisa, Italy.

Baker Hughes, 50127 Firenze, Italy.

出版信息

Materials (Basel). 2020 Apr 2;13(7):1643. doi: 10.3390/ma13071643.

DOI:10.3390/ma13071643
PMID:32252282
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7178431/
Abstract

A 16Cr5NiMo supermartensitic stainless steel was subjected to different tempering treatments and analyzed by means of permeation tests and slow strain rate tests to investigate the effect of different amounts of retained austenite on its hydrogen embrittlement susceptibility. The 16Cr5NiMo steel class is characterized by a very low carbon content. It is the new variant of 13Cr4Ni. These steels are used in many applications, for example, compressors for sour environments, offshore piping, naval propellers, aircraft components and subsea applications. The typical microstructure is a soft-tempered martensite very close to a body-centered cubic, with a retained austenite fraction and limited ferrite phase. Supermartensitic stainless steels have high mechanical properties, together with good weldability and corrosion resistance. The amount of retained austenite is useful to increase low temperature toughness and stress corrosion cracking resistance. Experimental techniques allowed us to evaluate diffusion coefficients and the mechanical behaviour of metals in stress corrosion cracking (SCC) conditions.

摘要

对一种16Cr5NiMo超级马氏体不锈钢进行了不同的回火处理，并通过渗透试验和慢应变速率试验进行分析，以研究不同数量的残余奥氏体对其氢脆敏感性的影响。16Cr5NiMo钢种的特点是碳含量极低。它是13Cr4Ni的新变体。这些钢被用于许多应用中，例如，酸性环境中的压缩机、海上管道、海军螺旋桨、飞机部件和海底应用。典型的微观结构是非常接近体心立方的软化回火马氏体，具有残余奥氏体分数和有限的铁素体相。超级马氏体不锈钢具有高机械性能，同时具有良好的可焊性和耐腐蚀性。残余奥氏体的数量有助于提高低温韧性和抗应力腐蚀开裂性能。实验技术使我们能够评估应力腐蚀开裂（SCC）条件下金属的扩散系数和力学行为。

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