一、简介 20Cr_1Mo_1VTiB钢经过十余年的全面研制及运行考验,证实它具有良好的高温机械性能、良好的工艺性能。在电厂的长期运行试验中取得了令人的满意结果。它不仅抗高温长期脆化顷向及淬透性分别优于25Cr_2Mo_1V及20Cr_1Mo_1V_1钢,而且在高温组织稳定性及抗松弛性方面可与国外的12％ I. Introduction 20Cr_1Mo_1VTiB steel after more than 10 years of comprehensive development and operational tests, confirmed that it has good high-temperature mechanical properties, good process performance. Satisfactory results have been achieved in the long-term operation of power plants. It is not only resistant to high temperature long-term embrittlement and hardenability are better than 25Cr_2Mo_1V and 20Cr_1Mo_1V_1 steel, but also in high temperature tissue stability and anti-relaxation with foreign 12%