18-07-2023 дата публикации
Номер: CN116445679A
Принадлежит:
The invention discloses a method for manufacturing yttrium-containing ultrapure high-chromium ferritic stainless steel mother alloy, which comprises the following steps of: proportioning according to the component control requirement of the mother alloy, drying the proportioned raw materials at 125 DEG C for more than 1 hour by using a raw material baking furnace, and sequentially feeding Fe (50%), Cr (50%), W, Mo, Nb, Cr (50%) and Fe (50%); power transmission melting is carried out under vacuum, and the vacuum degree is smaller than 10 Pa; the vacuum degree is smaller than 1 Pa, the refining temperature is 1570-1590 DEG C, the molten steel temperature is 1620 DEG C, the state is kept at the constant temperature, and a module is prepared; argon is filled for 50000 Pa, metal yttrium is wrapped with a pure iron sheet, manganese is added, stirring is conducted for 1.5 min after adding, and rapid pouring is conducted. The low-carbon-nitrogen ultra-pure ferritic stainless steel can be suitable ...
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