1.前言 热锻用非调质棒钢,目前已广泛应用于汽车部件等方面。但是,由于最终产品的尺寸、形状是多种多样的,所以热锻条件对这类钢的材质特性有很大的影响。就利用未再结晶区域附近的温度范围来控制轧制的钢材而论,以前已有过比较详细的研究。但就热锻状态下的高温区域,能考 1. Introduction Forging non-quenched and tempered steel, has been widely used in automotive parts and so on. However, due to the variety of sizes and shapes of the final product, hot forging conditions have a significant impact on the material properties of such steels. In the past, more detailed studies have been conducted on steels to be rolled by controlling the temperature in the vicinity of the non-recrystallized region. But hot forging under the hot area, can test