Ensure chromium steel made of the method for optimal creep resistant product quality

摘要

Method ensures the chemical composition of optimal flame retardant property chromium steel product, and quality percentage indicates there is value: 0.05 to 0.25% carbon in this regard; 0.01 to 0.5% manganese; 0.01 to 0.5% silicon; 8 to 14% chromium, 0.2 to 1.8% molybdenum; Up to 2.2% micro tungsten, 0.05 to 0.3% vanadium; 0.02 to 0.2% niobium; 0.03 to 0.1% nitrogen; Up to 1.5% micro nickel; The copper of up to 2.0% up to 3% micro and trace, cobalt, slag iron attach element and common impurities. The product is heated to 1180 to 1220 degrees Celsius and subsequent cooling in empty gas and water and oil and 100 to 20 degrees Celsius. Then,Heat product to 1030 to 1070 degrees Celsius and cool sky gas and water or oil, be cooled to 100 to 20 degrees Celsius and subsequent tempering at 600 to 780 degrees Celsius around temperature.IMAGE