The Effect of Mo on SCC of System “Low Alloy Steels/Nitrate Solutions”
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摘要: 以高風溫熱風爐用鋼的沿晶應力腐蝕開裂問題為背景,研究了Mo對低合金鋼在硝酸鹽溶液中的應力腐蝕行為。結果表明,低合金鋼中加入合金元素將使鋼中貝氏體和/或珠光體含量增大,從而提高了材料的穩定性和抗SCC耐蝕性。提出了低合金鋼/硝酸鹽溶液體系的"溫度-鉬含量-SCC圖"。Abstract: The effect of Mo on the susceptibility to SCC of the low alloy steels in nitrate solutions has been studied by SSRT technique on the background of the intergranular stress corrosion cracking at high temperature.The addition of Mo to the alloy steel is favorable for the transformation of ferrite to bainite and/or pearlite and the latters are more resistant to SCC than the former.The diagram of "temperature-Mo content-SCC" of the system "low alloy steels/nitrate solutions" is proposed.
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Key words:
- low alloy steel /
- stress corrosion cracking /
- Mo element /
- bainite
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