EFFECT OF ADMIXTURES OF IRON AND SILICON ON THE STRUCTURE AND CRACKING OF NEAR-EDGE VOLUMES IN ROLLING OF LARGE FLAT INGOTS FROM ALLOY 7075

摘要

The effect of the content of iron and silicon admixtures in aluminum alloy 7075 on the composition, morphology, and fineness of phase components in the microstructure of ingots with cross section of 390 - 1330 mm in homogenized condition is studied. The mechanical properties of ingots at room and enhanced temperatures are determined depending on the content of iron and silicon in the alloy. The effect of the iron and silicon content in alloy 7075 on fracture of near-edge volumes in the process of hot rolling of plates with a thickness of 76.3 - 152 mm is determined.