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MANUFACTURE OF FERRITE PLUS PEARLITE TYPE NON-HEATTREATED STEEL FORGED PRODUCT HAVING HIGH TOUGHNESS AND HIGH YIELD STRENGTH
MANUFACTURE OF FERRITE PLUS PEARLITE TYPE NON-HEATTREATED STEEL FORGED PRODUCT HAVING HIGH TOUGHNESS AND HIGH YIELD STRENGTH
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机译：具有高韧性和高屈服强度的铁素体+珠光体型非强化钢锻造产品的制造
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摘要
PROBLEM TO BE SOLVED: To provide a manufacturing method for the forged part having high toughness and moreover high yield strength using the ferrite plus pearlite type non-heattreated steel which is inexpensive and moreover used in the wide usage. ;SOLUTION: This alloy is composed of, by wt., 0.20-0.50% C, 0.10-2.0% Si, ≤0.050% P, 0.08-0.40% V, moreover 0.8-2.0% Mneq i.e., manganese equivalent expressed by the formula Mneq=Mn+Cr+Mo+Cu+Ni/2+V+10(Nb-0.02) (However, 0.2-2.0% Mn, 0.1-1.0% Cr, ≤0.50% Mo, ≤0.50% Ni, ≤0.50% Cu) and substantially the balance Fe. After heating this alloy at ≥950°C to austenitize, the temperature is lowered once to 750-1050°C by cooling, forging is executed in this temperature zone, then cooling is applied to generate the ferritic plus peartic transformation, whereby the forget part of ≥73 in yield ratio is obtained.;COPYRIGHT: (C)1998,JPO
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机译：解决的问题：提供一种廉价且广泛使用的铁氧体和珠光体型非热处理钢，以提供一种具有高韧性和高屈服强度的锻造零件的制造方法。 ;解决方案：该合金由0.20-0.50％C，0.10-2.0％Si，≤0.050％P，0.08-0.40％V以及0.8-2.0％Mneq组成，按重量计，锰当量由下式表示Mneq = Mn + Cr + Mo + Cu + Ni / 2 + V + 10（Nb-0.02）（然而，0.2-2.0％Mn，0.1-1.0％Cr，≤0.50％Mo，≤0.50％Ni，≤0.50％ Cu）和基本上其余的Fe。将该合金在≥950°C加热至奥氏体化后，通过冷却将温度降低至750-1050°C，在此温度范围内进行锻造，然后进行冷却以生成铁素体加梨铁相变，从而遗忘部分获得了≥73的收率。版权所有：（C）1998，日本特许厅
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