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公开(公告)号：US3787250A
公开(公告)日：1974-01-22
申请号：US3787250D
申请日：1972-10-05
发明人： COVER R , KORCHYNSKY M , BELL J
CPC分类号： C22C38/20 , C21D8/0226
摘要： Low-alloy steels having five to eight times the atmospheric corrosion resistance of carbon steels, 80,000 psi minimum yield strengths and an overall desirable balance of mechanical properties produced directly off the hot-mill have the following chemistry: carbon, .04 percent to .10 percent; manganese, .40 percent to 1.80 percent; sulfur, .03 percent maximum; aluminum, .015 percent minimum; chromium, .90 percent to 1.20 percent copper, .30 percent to .50 percent; silicon, .50 percent to 1.20 percent; phophorus, .10 percent to .15 percent; columbium, .015 percent to .040 percent; and zirconium, .04 percent to .12 percent or a total content of rare earth elements, such as cerium and lanthanum, such that the weight ratio of total rare earths to sulfur is at least 2.8 to 1. In processing the steel to strip or plate, it is hot-rolled so as to have a finishing temperature between its A3 temperature and 1,700* F, cooled at a rate between 20* F/sec. and 45* F/sec. and coiled or piled at a temperature of 1,100* F + OR - 100* F.
摘要翻译： 具有五至八倍的碳钢耐大气腐蚀性的低合金钢，80,000psi的最小屈服强度和直接从热轧机产生的机械性能的总体期望平衡具有以下化学性质：碳，0.04％至10.10 百分; 锰，0.40％至1.80％; 硫，最大0.03％; 铝，最低0.015％ 铬，90％至1.20％铜，0.30％至0.50％。 硅，50％至1.20％; phophorus，10％至0.15％; 铌，0.015％至0.040％; 和锆，0.04％至0.12％或稀土元素（例如铈和镧）的总含量，使得总稀土与硫的重量比至少为2.8:1。在钢中加工剥离或 将其热轧成具有在A3温度和1700°F之间的终轧温度，以20°F /秒的速率冷却。 和45°F /秒。 并在1100°F +/- 100°F的温度下卷起或堆积。
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公开(公告)号：US3711340A
公开(公告)日：1973-01-16
申请号：US3711340D
申请日：1971-03-11
发明人： KORCHYNSKY M , BELL J , COVER R
CPC分类号： C22C38/20 , C21D8/0226
摘要： LOW-ABLE STEELS HAVING FIVE TO EIGHT TIMES THE ATMOSPHERIC CORROSION RESISTANCE OF CARBON STEELS, 80,000 P.S.I. MINIMUM YIELD STRENGTHS AND AN OVERALLY DESIRABLE BALANCE OF MECHANICAL PROPERTIES PRODUCED DIRECTLY OFF THE HOTMILL HAVE THE FOLLOWING CHEMISTRY: CARBON, 0.4% TO 10%; MANGANESE, 40% TO 1.80%; SULFUR, .03% MAXIMUN; ALUMINUM, .015% MINIMUM; CHROMIUM, .90% TO 1.20%; COPPER, .30% TO .50% SILICON, .50% TO 1.20%; PHOSPHORUS, 10% TO .15%; COLUMBIUM, .015% TO .040%; AND ZIRCONIUM, .04% TO .12% OR A TOTAL CONTENT OF RARE EARTH ELEMENTS, SUCH AS CERIUM AND LANTHANUM, SUCH THAT THE WEIGHT RATIO OF TOTAL RARE EARTHS TO SULFUR IS AT LEAST 2.8 TO 1. IN PROCESSING THE STEEL TO STRIP OR PLATE, IT IS HOT-ROLLED SO AS TO HAVE A FININSHING TEMPERATURE BETWEEN ITS A3 F./SEC. AND 45*F./SEC. AND COILED OR POLED AT A TEM20*F./SEC. AND 45*F./SEC. AND COILED OR PILED AT A TEMPERATURE OF 1100*F.$100*F.
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