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首页> 外文期刊>Materials Letters >Influence carbon and/or iron carbide on the structure and properties of dual-phase steels
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Influence carbon and/or iron carbide on the structure and properties of dual-phase steels

机译：碳和/或碳化铁对双相钢结构和性能的影响

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摘要

A study has been directed towards the effect of C and/or Fe_3C on processing, structure and properties of dual-phase (ferrite+martensite) steel. Such type of steel was produced from 0.11C-1.58Mn-0.4Si (ferrite+pearlite) steel. An intercritical holding in the α+γ field followed by different cooling rates so as to obtain various dual-phase microstructures was carried out. It has been found that the carbon (either free or combined with iron) of the individual phase of dual-phase steel plays a significant role in controlling the properties of each phase. A higher interstitial carbon in ferrite resulting from drastic quenching leads to its embrittlement. In contrast, a lower carbon brought about by moderate cooling rates is thought to largely account for the improved properties of dual-phase steels. The yielding behavior depends upon the relative interaction between C/Fe_3C and the so-called "mobile" dislocations in ferrite. The strength of ferrite or martensite is carbon dependent and affects markedly the work hardening behavior of dual-phase steels. TEM study reveals spherodization of Fe_3C particles prior to the austenitizing process.
机译：研究针对C和/或Fe_3C对双相（铁素体+马氏体）钢的加工，结构和性能的影响。这种类型的钢由0.11C-1.58Mn-0.4Si（铁素体+珠光体）钢制成。在α+γ场中进行临界间保持，然后采用不同的冷却速率，以获得各种双相微结构。已经发现，双相钢的单个相的碳（游离的或与铁结合的）在控制每个相的性质中起着重要的作用。急剧淬火导致铁素体中较高的间隙碳导致其脆化。相反，中等冷却速率带来的较低碳被认为在很大程度上解释了双相钢性能的提高。屈服行为取决于C / Fe_3C与铁素体中所谓的“移动”位错之间的相对相互作用。铁素体或马氏体的强度取决于碳，并且显着影响双相钢的加工硬化行为。 TEM研究表明，在奥氏体化之前，Fe_3C颗粒已被球化。

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