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首页> 外文会议>Iron Steel Supplement 2005 vol.40: The Joint International Conference of HSLA Steels 2005 and ISUGS 2005 >Thermodynamic Calculations of Carbonitrides in V-Ti-N Microalloyed Steels for Non-quenched and Tempered Oil Well Tubes
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Thermodynamic Calculations of Carbonitrides in V-Ti-N Microalloyed Steels for Non-quenched and Tempered Oil Well Tubes

机译：V-Ti-N非调质油井管用V-Ti-N微合金钢中碳氮化物的热力学计算

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摘要

Precipitation behaviors of Carbonitrides in a V-Ti-N microalloyed steel for non-quenched and tempered seamless oil well tubes were calculated by the equilibrium principle of a three-phase miscibility gap including the austenite and two Carbonitrides. The thermodynamic calculations indicate that the precipitates first formed at 1473°C are TiN particles, subsequently some of them formed at high temperatures maintain the chemistry down to low temperatures, the others gradually transform to complex (Ti_xV_(1-x))(C_yN_(1-y)) Carbonitrides. In addition, the precipitates formed at 846°C are V- and C-rich V(C_xN_(1-x)) Carbonitrides. The formation sequence is verified by experimental data. These results are more consistent with the viewpoint that, the precipitation behavior of vanadium in austenite matrix below 800°C in medium-carbon V-bearing microalloyed steels plays a great role in controlling the decomposition of austenite.
机译：通过包括奥氏体和两个碳氮化物的三相混溶性间隙的平衡原理计算V-Ti-N微合金钢中的碳氮化碳腈的析出行为。热力学计算表明，首先在1473℃下形成的沉淀物是锡颗粒，随后它们在高温下形成的一些，将化学保持下降到低温，其他方面逐渐转化为复合物（Ti_xv_（1-x））（c_yn_（ 1-Y））碳氮化物。另外，在846℃下形成的沉淀物是V-和富含C的V（C_XN_（1-x））碳氮化物。通过实验数据验证形成序列。这些结果与观点更符合的是，在800℃下奥氏体基质中钒钒的沉淀行为在中 - 碳V轴承微合金钢中的沉淀行为在控制奥氏体的分解方面发挥着重要作用。

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