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首页> 外文期刊>Materials Science and Engineering >Thermal fatigue testing of Inconel 617 and Stellite 6 alloys as potential tooling materials for thixoforming of steels
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Thermal fatigue testing of Inconel 617 and Stellite 6 alloys as potential tooling materials for thixoforming of steels

机译：Inconel 617和Stellite 6合金的热疲劳测试，作为钢的触变性的潜在工具材料

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摘要

The principle failure mechanism in thixoforming dies is thermal fatigue as the mechanical loading on the tooling is modest owing to a mushy feedstock. Samples of X32CrMoV33 steel, Inconel 617 and Stellite 6 alloys were submitted to thermal cycling under conditions which approximate thixoforming of steels. The thermal fatigue test of the X32CrMoV33 hot work tool steel was terminated after 1500 cycles due to severe surface degradation and temper softening, both leading to a relatively poor thermal fatigue resistance, in spite of favorable thermo-physical properties. The response to thermal cycling of the Ni-and Co-based superalloys, Inconel 617 and Stellite 6, under steel thixoforming conditions, on the other hand, was encouraging. The Inconel 617 and Stellite 6 samples are much more resistant to oxidation and temper softening than the hot work tool steel, providing a superior resistance to thermal fatigue cracking with few and relatively shallow cracks after as many as 5000 thermal cycles.
机译：触变性成型模具的主要失效机理是热疲劳，因为由于糊状原料，模具上的机械负荷适中。 X32CrMoV33钢，Inconel 617和Stellite 6合金的样品在近似于钢的触变性的条件下进行了热循环。 X32CrMoV33热作工具钢的热疲劳试验在1500次循环后由于严重的表面退化和回火软化而终止，尽管具有良好的热物理性能，但都导致相对较差的抗热疲劳性。另一方面，镍和钴基超级合金Inconel 617和Stellite 6在钢触变成形条件下对热循环的响应令人鼓舞。 Inconel 617和Stellite 6样品比热作工具钢具有更高的抗氧化性和回火软化性，在经过多达5000个热循环后，具有极好的抗热疲劳开裂的能力，且裂纹很少且相对较浅。

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