That is to treat LD31 alloy by selecting reasonable chemical components and strengthening meltrefining.
提出了选择合理的化学成份和加强熔体精炼等方法，对LD31合金进行处理。
2
The invention relates to metallurgy and foundry engineering, in particular to producing a monocrystalline structure and to a meltrefining associated therewith.
本发明涉及一种生产超纯金属以及由其制造的单晶体的方法。
3
Occasionally, a bubble is not removed during refining, a sand grain refuses to melt, a tremor in the tin puts ripples into the glass ribbon.