17-4PH为马氏体沉淀硬化型不锈钢。该类型的不锈钢Cr含量高,碳含量较低,含Ni、焊接性好且具有比Cr13型410系列及1Cr17Ni2型431好的耐腐蚀性,与304相当。同时该钢中Cu和Nb合金元素含量也较高,这些合金元素在热处理过程中可析出时效硬化相,使材料具有较高的强度和硬度。基于以上优点,该钢被广泛应用于要求具有一定耐蚀...
摘要: Deals with the functions of the American Physical Society's Panel on Public Affairs (POPA). Perceptions about the concern given by scientists to society; Studies made by POPA; Background on the Committee on International Scientific Affairs.年份: 1981 ...