公开(公告)号：EP1956100A1

公开(公告)日：2008-08-13

申请号：EP06833094.3

申请日：2006-11-21

申请人： National Institute for Materials Science

发明人： KIMURA, Yuuji, NATIONAL INSTITUTE FOR MATERIALS SCIENCE ,  INOUE, Tadanobu, NATIONAL INSTITUTE FOR MATERIALS SCIENCE ,  TSUZAKI, Kaneaki, NATIONAL INSTITUTE FOR MATERIALS SCIENCE ,  NAGAI, Kotobu, NATIONAL INSTITUTE FOR MATERIALS SCIENCE

IPC分类号： C21D8/06 ,  C22C38/00

CPC分类号： C21D9/46 ,  C21D8/0205 ,  C21D8/0231 ,  C21D8/0431 ,  C21D8/065 ,  C21D8/105 ,  C21D9/0075 ,  C21D9/0093 ,  C21D9/525 ,  C22C38/02 ,  C22C38/04 ,  C22C38/18

摘要： There are provided a steel for warm working, to be subjected to warm working as various structures, components of cars, and the like, a warm working method thereof, and a steel material and a steel component obtainable from the warm working method. [Solving Means] A steel is to have a particle dispersion type fiber structure formed in the matrix by warm working. The steel is characterized in that the total amount of the dispersed second-phase particles at room temperature is 7 × 10 -3 or more in terms of volume fraction, and the Vickers hardness (HV) is equal to or larger than the hardness H of the following equation (2):
H = (5.2 - 1.2 × 10 -4 λ) × 10 2 ... (2)
when the steel is subjected to any of annealing, tempering, and aging treatments in the as-unworked state under conditions such that a parameter λ expressed by the following equation (1):
λ = T(logt + 20) (T; temperature (K), t; time (hr)) ... (1)
is 1.4 × 10 4 or more in a prescribed temperature range of 350°C or more and Ac1 point or less. This steel is taken as the steel for warm working.

摘要翻译： 本发明提供一种钢的工作温，要进行预热工作作为各种结构，汽车的部件，和类似物，热加工方法，以及它们的钢材和从温加工方法的钢部件可获得的。 [解决手段]一种钢是具有在通过热加工所述基质形成的颗粒分散型纤维结构。 该钢在室温下做的分散的第二相粒子的合计量为特征的是在体积分数计为7×10 -3以上，维氏硬度（HV）大于硬度H以上的情况下 以下等式（2）：H =（5.2 - 1.2×10 -4“）×10 2 ...（2）当钢下进行任何退火，回火，和时效处理中作为-未加工状态的 测试条件做了 “由下面的等式（1）：” 的参数= T（logt + 20）（T;温度（K），T;时间（hr））...（1）为1.4×10 4或 更在规定的温度范围内的350℃以上且Ac1点以下。 这种钢被作为钢的工作热情。