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在一些铁基、镍基合金中,硫与合金基体组成低熔点化合物,沿晶界分布,使合金的使用性能和热压力加工性能显著降低。经验证明,当合金含硫量小于0.005％时,合金的高温塑性才具有较高的水平。因此有些技术条件规定:用来熔炼某些高级合金的各种原材料中的含硫量不应超过0.005％。但目前所使用的某些金属原材料,由于采用一般的冶炼方法,有时很难将硫降到0.005％以下,远远大于技术条件所要求的指标。为了探讨有效的脱硫方法,解决高硫原材料的使用问题,进行了真空造渣脱硫试验。
In some iron-based and nickel-based alloys, sulfur and the alloy matrix form a low-melting-point compound that distributes along the grain boundaries to significantly reduce the serviceability and hot-press formability of the alloy. Experience has shown that when the alloy sulfur content of less than 0.005%, the high temperature plastic alloy has a higher level. Therefore, some technical conditions stipulate that the sulfur content of various raw materials used to smelt some advanced alloys should not exceed 0.005%. However, some of the currently used metal raw materials, due to the general smelting method, it is sometimes difficult to reduce the sulfur below 0.005%, far greater than the technical requirements of the indicators. In order to discuss the effective desulfurization method and solve the problem of using high sulfur raw materials, vacuum desulfurization desulfurization was carried out.