各国的产品规格不同也帮助保护熔炼厂免受外国竞争。
Product specifications that vary from country to country, meanwhile, help to protect refiners from foreign competition.
但是，熔剂保护法和气体保护法致使熔炼工艺及设备复杂化、易产生央杂，并且污染环境；
However, both flux and protective gas would lead to some problems such as inclusion, environmental pollution and complication of melting process and equipment.
综述了近年来国外镁合金熔炼气体保护技术，熔炼炉设计和镁液浇注技术及装置的最新研究成果。
Recent technique of inertial atmosphere protection in Mg alloy melting abroad as well as latest achievements in design of melting furnace and pouring technique and devices for Mg melt.
阐述了真空熔炼、氢气保护下引法连续定向凝固工艺。
The vacuum melting and argon protecting continuous unidirectional solidification technology was introduced, which combines vacuum inductive melting with continuous unidirectional solidification.
用真空熔炼法制备了多种贮氢合金原样，分别经不同温度、时间热处理和保护气氛下球磨处理。
In this paper a series of RE2MgNi9 hydrogen storage alloys were synthesized by vacuum induction melting method.
用真空保护气氛熔炼不同锂加入量的铜锂合金，得到系列表面光滑、内部致密的铜锭，并研究了锂对工业纯铜凝固特性的影响。
A series of Cu Li alloys with different contents of lithium have been obtained by means of vacuum induction furnace at Ar atmosphere .
研究了HFC- 32气氛对镁及镁合金在熔炼过程中的保护效果，并对其保护机理进行了探讨。
The protective effects of HEC-32 mixed gases in melting process of magnesium and magnesium alloys were experimentally studied and the protective mechanism was analyzed.
研究了HFC- 32气氛对镁及镁合金在熔炼过程中的保护效果，并对其保护机理进行了探讨。
The protective effects of HEC-32 mixed gases in melting process of magnesium and magnesium alloys were experimentally studied and the protective mechanism was analyzed.
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