Punching test for estimating tensile strength and total elongation of steel sheets
Punching test for estimating tensile strength and total elongation of steel sheets
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DOI：
10.1007/s00170-021-06898-7
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发表时间：
2021-05
期刊：
影响因子：
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通讯作者：
N. Nakamura;K. Mori;Hiroki Okada;Y. Abe
中科院分区：
文献类型：
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作者：
N. Nakamura;K. Mori;Hiroki Okada;Y. Abe
提出了一种简单估算钢板及成形件抗拉强度和延伸率的冲压试验方法。拉伸强度和总延伸率分别从最大冲压载荷下的剪切应力和在没有切割的情况下测量的坯料的剪切边缘处的抛光深度的百分比来估计。对于各种钢板的抗拉强度的范围从360到1500 MPa，线性函数的估计，实验获得。钢板的估计抗拉强度与单轴拉伸试验的测量强度的相关性相当高，并且估计总延伸率的相关性也很高。估算了热冲压件和冷冲压件的抗拉强度和总延伸率的分布。所提出的冲压试验不仅在实验室环境下，而且在工厂环境下也是可用的。
A punching test for simply estimating the tensile strength and total elongation of steel sheets and formed parts was proposed. The tensile strength and total elongation were estimated from the shear stress at the maximum punching load and percentage of the burnished depth at the sheared edge of the slug measured without cutting, respectively. For a variety of steel sheets with a range of the tensile strength from 360 to 1500 MPa, linear functions for the estimation were experimentally obtained. The correlation of the estimated tensile strength of the steel sheets with the measured one from the uniaxial tensile test was considerably high, and the correlation of the estimated total elongation was high. The distributions of tensile strength and total elongation for hot- and cold-stamped parts were estimated. The proposed punching test is available under not only a laboratory environment but also a factory environment.