Properties of low-alloy boron-containing steels Brinar 400 and Brinar 500 in as-delivered and normalized conditions are considered. Charpy tests carried out within temperature ranges of ductile-to-brittle transition were followed by fractographic analysis. The tests were carried out on specimens with their axes parallel and perpendicular to hot-working direction, at −40°C, −20°C, 0°C, and +20°C. The determined impact properties of Brinar steels were complemented with fractographic analysis performed with use of a scanning electron microscope. It was found that temperatures of ductile-brittle transition were significantly different for the materials in as-delivered and normalized conditions. In addition the tensile tests were carried out, determining basic strength properties of the analyzed materials.

中文翻译：

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Brinar 400 和 Brinar 500 钢在冲击试验中的断口分析

考虑了低合金含硼钢 Brinar 400 和 Brinar 500 在交货状态和正火条件下的性能。在韧性到脆性转变的温度范围内进行夏比试验，然后进行断口分析。在-40°C、-20°C、0°C和+20°C的温度下，对样品轴平行和垂直于热加工方向进行测试。用扫描电子显微镜进行的断口分析补充了 Brinar 钢的确定冲击性能。结果表明，在交付状态和正火条件下，材料的韧脆转变温度显着不同。此外，还进行了拉伸试验，以确定所分析材料的基本强度特性。