MetalTerminology金属术语.docVIP

?首页 ??相关技术论坛 ??工程英语 Metal Terminology 金属术语 作者?nancy???查看?3417???发表时间?2007/4/6 05:56??【论坛浏览】 Metal Terminology (A)金属术语A ACCORDION REED STEELHardened, tempered, polished and blued or yellow flat steel with dressed edges. Carbon content about 1.00%. Material has to possess good flatness, uniform hardness and high elasticity.ACID-BRITTLENESSBrittleness resulting from pickling steel in acid; hydrogen, formed by the interaction between iron and acid, is partially absorbed by the metal, causing acid brittleness.ACID-PROCESSA process of making steel, either Bessemer, open-hearth or electric, in which the furnace is lined with a siliceous refractory and for which low phosphorous pig iron（低磷生铁）is required as this element is not removed.ACID-STEELThe term has no reference to the acidity of the steel. (See Acid Process.)AGE HARDENING 经久硬化The term as applied to soft or low carbon steels, relates to slow, gradual changes that take place in properties of steels after the final treatment. These changes, which bring about a condition of increased hardness, elastic limit, and tensile strength with a consequent loss in ductility, occur during the period in which the steel is at normal temperatures.AGING 时效Spontaneous change in the physical properties of some metals, which occurs on standing, at atmospheric temperatures after final cold working or after a final heat treatment. Frequently synonymous with the term “Age-Hardening.”AIR COOLING 空气冷却（自然冷却）Cooling of the heated metal, intermediate in rapidity between slow furnace cooling and quenching, in which the metal is permitted to stand in the open air.AIR HARDENING STEEL 气硬性钢材Alloy steel which may be hardened by cooling in air from a temperature above the transformation range. Such steels attain their martensitic structure without going through the quenching process. Additions of chromium, nickel, molybdenum and manganese are effective toward this end.AISI STEELSSteels of the American Iron and Steel