1.导言在日本,锅炉大致分为以下几类:(1)容器和加热器等用的小容量锅炉;(2)发电用的功率为1,000—50,000千瓦左右的废热锅炉;(3)工业用的(主要是专一用途的发电)功率约为10,000—160,000千瓦以上的中等容量锅炉;(4)大型发电机组用的功率为300,000—1,100,000千瓦左右的大容量锅炉。确定制造这些锅炉的最佳材料,要考虑蒸气温度和压力以及 1. Introduction In Japan, boilers are broadly classified into the following categories: (1) small-capacity boilers for vessels and heaters; (2) waste heat boilers for power generation of about 1,000-50,000 kilowatts; (3) for industrial use (Mainly for single-purpose power generation) medium-capacity boilers with power of about 10,000-160,000 kilowatts and above; (4) Large-capacity boilers with power generation capacity of 300,000-1,100,000 kilowatts for large generating units. Identify the best material for making these boilers, taking into account the temperature and pressure of the steam as well