CAJ | 학술논문

对X80螺旋埋弧焊管和原料卷板进行了力学性能试验和金相组织分析，分析结果表明，在原料卷板宽度1/2处和1/4处组织中存在不同程度的偏析带，偏析带内分布有脆硬的板条马氏体和大颗粒Ti和Nb夹杂物；偏析带对X80卷板的屈服强度和抗拉强度影响不大；严重偏析带的出现，降低了原料的冲击韧性，改变了DWTT断口形貌，并且将成为爆破试验中母材爆裂的裂纹源。最后对减少X80卷板偏析带的产生提出了建议。
대X80라선매호한관화원료권판진행료역학성능시험화금상조직분석，분석결과표명，재원료권판관도1/2처화1/4처조직중존재불동정도적편석대，편석대내분포유취경적판조마씨체화대과립Ti화Nb협잡물；편석대대X80권판적굴복강도화항랍강도영향불대；엄중편석대적출현，강저료원료적충격인성，개변료DWTT단구형모，병차장성위폭파시험중모재폭렬적렬문원。최후대감소X80권판편석대적산생제출료건의。
The mechanical properties tests and metallographic structure analysis were carried out on X80 SAWH pipe and HRC raw material. The result showed that different levels of segregation band distributed in 1/2 and 1/4 position of the raw plate width, along the segregation band distributed rigid and brittle lath martensite and large particles inclusions of titanium and niobium, segregation affects the yield strength and tensile strength of X80 HRC slightly,segregation band appeared severely reduce the raw material impact toughness, change the DWTT fracture, and serious segregation will become the crack source of parent material in explosion test. Finally, it proposed suggestion for reducing segregation band of X80 rolled plate.