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Quality control mannered null Japanese welding association standard WES steel type
Quality control mannered null Japanese welding association standard WES steel type
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机译：质量控制符合空日本焊接协会标准WES钢类型
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摘要
PROBLEM TO BE SOLVED: To provide a system for controlling the quality of brittle crack propagation properties of a thick steel plate, which can easily evaluate the brittle crack propagation properties of a thick steel plate.;SOLUTION: A TKB test piece, a DWTT test piece, or a DT test piece is fractured by static three-point load, and the fracture transition temperature TTKB30%, TDWTT30%, or TDT30% at which the ductile fracture ratio of the test piece is 30% is defined. The test piece having a thickness of 25 mm is taken from a lower portion of a surface layer of a steel plate when the steel plate has a thickness t of not less than 25 mm to less than 50 mm, and the brittle fracture propagation arrest performance Kca value is judged to be not less than A (N/mm1.5) at the guaranteed temperature of T0°C when TTKB30%, TDWTT30%, or TDT30% is lower than T°C. Alternatively, the test piece having a thickness of 25 mm is taken from a central portion of the thickness of a plate or a lower portion of a surface layer of the steel plate when the steel plate has a thickness t of not less than 50 mm, and the brittle fracture propagation arrest performance Kca value is judged to be not less than A (N/mm1.5) at the guaranteed temperature of T0°C when the average of TTKB30%, TDWTT30%, or TDT30% is lower than T°C.;COPYRIGHT: (C)2008,JPO&INPIT
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机译：解决的问题：提供一种控制厚钢板脆性裂纹扩展特性质量的系统，可以轻松评估厚钢板的脆性裂纹扩展特性。解决方案：TKB测试件，DWTT测试试件或DT试验件在静态三点载荷作用下断裂，断裂转变温度T TKB30％，T DWTT30％或T DT30％定义了试件的延性断裂率为30％的。当钢板的厚度t为25mm以上且小于50mm时，从钢板的表层的下部截取厚度为25mm的试验片，并且具有脆性断裂扩展抑制性能。当T TKB30％ 0 ℃下，Kca值不小于A（N / mm 1.5 ）。 >，T DWTT30％或T DT30％低于T°C。或者，当钢板的厚度t为50mm以上时，从钢板的厚度的中央部或表面的下部取25mm的厚度的试验片。平均温度为T 0 ℃的保证温度时，判断脆性断裂扩展停止性能Kca值为A（N / mm 1.5 ）以上。 T TKB30％，T DWTT30％或T DT30％的值低于T.°C;版权所有：（C）2008，JPO＆INPIT
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