Дано обоснование целесообразности использования в Украине технологий кальцийтермического восстановления циркония из тетрафторида циркония и последующего рафинирования этого металла способом электронно-лучевой плавки с промежуточной емкостью с дальнейшей выплавкой из него сплавов циркония электронно-лучевой гарнисажной плавкой с получением литых трубных заготовок для изготовления труб-оболочек тепловыделяющих элементов АЭС. Библиогр. 21, табл. 4. К л ю ч е в ы е с л о в а : цирконий; сплавы; электронно-лучевая плавка; вакуумно-дуговой переплав; литые заготовки; слиток; химический состав; механические свойства
Mechanical properties and texture of tube material formed in the process of tube production were studied. Texture in tubes was estimated by contractile strain ratio (CSR) according to requirements of the standard for tubes. Mechanical properties depend on CSR. Optimal values of mechanical properties were determined: ultimate strength, yield strength and relative elongation which provide CSR values within 1.3...3.5. The texture was evaluated in the process of tube manufacture. An increase in radial component of the texture leads to an increase in CSR. At high CSR values up to 3-3.5, tubes often do not withstand process tests for flattening and bending. Correction of CSR values is required. It was shown that an increase in ductility of tubes increases the value of CSR.
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