一、引言鉴于目前矿物燃料煤的价格高,故提高发电厂的效率已成为待解决的关键问题。通过提高蒸汽的温度便可大大提高效率,所以,发展在650℃下使用的锅炉已成为近期研究的课题。本研究的目的是发展一种用于超加热器和换热管的新型合金。一般讲,各种常规合金所要求的高温性能,诸如热腐蚀抗力、蠕变强度和韧性隋工作温度的提高而降低。 I. INTRODUCTION In view of the high price of fossil fuel coal at present, increasing the efficiency of power plants has become a key issue to be solved. By increasing the temperature of the steam can greatly improve the efficiency, therefore, the development of the boiler used at 650 ℃ has become a research topic recently. The purpose of this study is to develop a new alloy for superheaters and heat exchange tubes. In general, the high temperature properties required for various conventional alloys, such as hot corrosion resistance, creep strength, and toughness sui operating temperatures, are reduced.