The experiment shows that adopting protective casting technology can reduce reoxidation and improve the internal and surface quality of block.
试验结果表明采用钢包注流保护浇注技术可降低二次氧化，提高铸坯内在和表面的质量。
This paper mainly analyzes the process of bloom casting for heavy rail and internal cracks like central crack and so on in order to solve the internal quality problems.
对方坯重轨钢系列铸坯内部产生的中间裂、中心裂等缺陷进行工艺探索研究，以解决生产过程中出现的内部质量问题。
The internal quality of aluminum alloy castings that were produced by Vacuum Differential Pressure casting was studied with both theory and practice.
对用真空差压铸造法生产的铝合金铸件性能进行了研究，从理论和实践量方面论述了其较好的铸件内在性能。
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