Ultrahigh-purity single-phase austenitic stainless steel and preparation method thereof

The invention relates to ultra-high-purity single-phase austenitic stainless steel and a preparation method thereof.The method comprises the steps that raw materials with set purity are obtained, the raw materials comprise chromium, nickel, molybdenum and iron, and the purity of the iron is improved through remelting pretreatment; the raw materials are subjected to vacuum induction melting and then poured, and a first steel ingot is obtained; the first steel ingot is subjected to vacuum arc remelting treatment, and a second steel ingot is obtained; and the second steel ingot is forged and then subjected to solid solution heat treatment, and the ultra-pure-grade single-phase austenitic stainless steel is obtained. The technical problem that existing stainless steel is difficult to meet the high-purity requirement of materials is solved. 本申请涉及一种超高纯级单相奥氏体不锈钢及其制备方法，所述方法包括：得到具有设定纯度的原材料，所述原材料包括铬、镍、钼以及铁，所述铁的纯度通过重熔预处理得以提高；将所述原材料进行真空感应熔炼，后进行浇注，得到第一钢锭；将所述第一钢锭进行真空电弧重熔处理，得到第二钢锭；将所述第二钢锭进行锻造，后进行固溶热处理，得到超高纯级单相奥氏体不锈钢。本申请内容解决