The contribution of nano-sized precipitates to hardening metal products prepared by hot stamping from microalloyed niobium and titanium steels is evaluated. In order to calculate the characteristics of carbide precipitates (quantity, size), kinetics are modeled for their precipitation from austenite. It is shown that the increase in yield strength due to microalloying steel with niobium is greater than with titanium, and it increases with increase in their content. With a concentration of 0.1% each of Nb and Ti, the contribution to hardening steel with 0.3% C reaches 186 and 129 MPa, respectively.

中文翻译：

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过量相析出对热冲压制备结构钢强度的影响

评估了纳米级沉淀物对微合金化铌钛钢热冲压制备的金属产品的硬化作用。为了计算碳化物析出物的特征（数量、尺寸），对它们从奥氏体中析出的动力学进行建模。结果表明，含铌的微合金钢对屈服强度的增加大于含钛的，并且随着其含量的增加而增加。Nb 和 Ti 各为 0.1% 时，0.3% C 对硬化钢的贡献分别达到 186 和 129 MPa。