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在天然气压缩机高强度灰铸铁HT300缸体、缸盖等受压件受压部位的非加工面,采用刷碲涂料的方法解决渗漏问题,但必须注意碲在高温溶入铸铁中,对铸铁力学性能的不利影响。论述了碲元素含量及浇注温度对铸件石墨形态和抗拉强度的影响。实验和生产实践表明,在熔炼时最好不加刷过碲粉的回炉料,对于含有碲涂料的受压件,一定要严格控制浇注温度,以确保铸件的强度。
In natural gas compressor high strength gray iron HT300 cylinder, cylinder head and other parts of the pressure parts of the non-machined surface, the use of brush-tellurium paint solution to the problem of leakage, but we must note that tellurium dissolved in high temperature cast iron, cast iron Adverse effects of mechanical properties. The effects of Te content and pouring temperature on the graphite morphology and tensile strength of castings were discussed. Experiments and production practices show that it is best not to charge the tellurium powder back to the furnace during melting. For the compressors with tellurium coating, the pouring temperature must be strictly controlled to ensure the strength of the casting.