一、引言工字梁作为常用型材,出厂时一般按标准仅作拉伸强度和冲击韧性试验。至于特别的性能则由使用者另行检验。某单位进口一批25工字梁,缺少基本性能数据。我们对材料进行了拉伸、一次室温及低温冲击、小能量多次冲击、冲击磨损等多项试验,取得了可供其他部门参考的性能数据。二、试验过程和结果 1.25工字梁的规格及成分工字梁的高度×腰厚×腿宽为250×125×10/19mm。其化学成分为0.12％C、0.16％Si、0.43％Mn、0.031％P、0.038％S。 2.取样步位及机加工在两腿宽及腰部各自取样。对冲击韧性 First, the introduction I-beam as a common profile, the factory is generally only the standard tensile strength and impact toughness test. As for the special performance by the user to test separately. A unit of a batch of 25 I-beam, the lack of basic performance data. We have conducted a number of tests on materials such as stretching, a room temperature and low temperature impact, small energy multiple impact, impact wear and other performance data obtained for reference by other departments. Second, the test process and the results 1.25 I-beam specifications and composition I-beam height × waist thickness × leg width of 250 × 125 × 10 / 19mm. The chemical composition of 0.12% C, 0.16% Si, 0.43% Mn, 0.031% P, 0.038% S. 2. Sampling steps and machining their legs in the width and waist samples. Impact toughness