利用在真空感应炉中使氢与GH132合金液平衡的方法得到不同氢含量的锭子,研究了铸锭氢含量对GH132合金中温塑性的影响。结果表明,铸锭氢含量不同(2.0—19.6ml/100g),但试棒氢含量被降至同一水平(0.5ml/100g左右)时,合金的塑性相近,均不产生中温低塑性区。 研究了微量Pb对GH132合金中温塑性的影响,发现大于2ppm的Pb便急剧恶化GH132合金的中温塑性,导致中温低塑性区的产生。Pb的有害作用可解释为降低晶界强度及等强温度。
The effect of the hydrogen content in the ingot on the medium temperature tensile ductility of an alloy GH132 has been investigated. Various hydrogen contents in thee ingots were produced by maintaining the equilibrium on different pressures of hydrogen input in a vacuum induction furnace and the alloy melts before casting. The results show that no matter what the original hydrogen contents, e. g. 2.0 to 19.6 ml/100 g, of the ingots are, neither marked difference to the ductility between high and low hydrogen containing ingots nor low tensile ductility region under medium temperature is found if the ingots are dehydrogenated to such extent of similar hydrogen content about 0.5 ml/100 g.The influence of trace Pb on medium temperature tensile ductility of the alloy has also been studied. Serious ductility deterioration was found and low tensile ductility region under medium temperature was obtained when Pb exceeded 2 ppm. This harmfulness may be explained by the diminishment of the granular strength and the equi-strength temperature of GH132.
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