一、概述 现代动力、石油、化学工业和原子能工业的飞速发展,对压力容器和管道、锅炉等提出了各种愈来愈苛刻的要求,其中包括高温和高压同时作用的情况。如电热厂高压锅炉的一次过热器管子、大型氨厂一段加压蒸汽转化炉的转化管及核电站的受压容器和部 I. Overview The rapid development of modern power, petroleum, chemical industry and atomic energy industry has put forward increasingly stringent requirements on pressure vessels and pipes, boilers, etc., including the simultaneous application of high temperature and high pressure. Such as a superheater tube of a high-pressure boiler in a heating plant, a reforming tube in a large-scale ammonia plant for a pressurized steam reformer and a pressure vessel and a part of a nuclear power plant