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MANUFACTURE OF HIGH-STRENGTH LOW-CARBON STEEL MATERIAL HAVING SUPERIOR HEAVY WORKABILITY

机译:具有超强可加工性的高强度低碳钢材料的制造

摘要

PURPOSE:To obtain a high-strength low-carbon steel material having superior heavy workability by forming a bainite, martensite or bainite-martensite mixed structure as the structure of a low-carbon steel, carrying out austenitizing by heating, and cooling the steel under specified conditions. CONSTITUTION:A bainite, martensite or bainite-martensite mixed structure in which the grain size of former austenite is =35mum is formed as the structure of a low-carbon steel having a composition consisting of, by weight, 0.01-0.3% C, 1.5% Si, 0.3-2.5% Mn and the balance Fe with inevitable impurities. Austenitizing is then carried out to =about 20% austenite content by heating the steel to the Ac1 point - the Ac3 point, and the steel is cooled to ordinary temp. -500 deg.C at 40-150 deg.C/sec average cooling rate.
机译:用途:通过形成贝氏体,马氏体或贝氏体-马氏体的混合组织作为低碳钢的组织,通过加热进行奥氏体化并在以下温度下冷却,以获得具有优异的重加工性的高强度低碳钢材料。指定条件。组成:贝氏体,马氏体或贝氏体-马氏体的混合组织,其中前奥氏体的晶粒尺寸小于等于35μm,是低碳钢的组织,其成分为0.01-0.3%C, <1.5%Si,0.3-2.5%Mn和余下的Fe,不可避免地带有杂质。然后通过将钢加热到Ac1点-Ac3点进行奥氏体化至> =约20%的奥氏体含量,并将钢冷却到常温。 -500℃,平均冷却速度为40-150℃/秒。

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