Abstract

Experimental works are preformed to process the substandard wastes of a cast VZhM4-VI nickel superalloy, the carbon content of which exceeds the requirements of standards and does not allow their further use as a charge material. Some technological solutions have been tested, including high-temperature treatment of a melt (HTTM) at various temperatures and holding times, the use of an oxidizing agent in the form of nickel oxide, and their complex application. The efficiency of each of the proposed solutions in terms of the decarburization of the melt is considered, their kinetic dependences are established, and the advantages and disadvantages of each solution are noted. The results obtained demonstrate that the most effective technological solution is the combined use of HTTM and the oxidizing agent, which makes it possible to use a limited amount of the wastes after recycling in melting a VZhM4-VI alloy and provide significant savings in the scarce and expensive fresh alloy components such as ruthenium, rhenium, and tantalum.

中文翻译：

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开发用于处理VZhM4-VI镍高温合金变级废料以降低碳含量的工艺参数

摘要

已经进行了实验工作，以处理铸造的VZhM4-VI镍超合金的不合格废物，其碳含量超过标准要求，并且不允许将其进一步用作装料。已经测试了一些技术解决方案，包括在各种温度和保持时间下对熔体（HTTM）进行高温处理，使用氧化镍形式的氧化剂以及它们的复杂应用。考虑到每种提出的解决方案在熔体脱碳方面的效率，建立了它们的动力学依赖性，并指出了每种解决方案的优缺点。获得的结果表明，最有效的技术解决方案是将HTTM和氧化剂结合使用，