摘要
Ｆｅ－Ｎｂ－Ｃ合金内耗测试表明：７００℃，１ｈ水淬合金的Ｓｎｏｅｋ峰较低，而且含Ｎｂ越多，Ｓｎｏｅｋ峰高（ｈｓ）越低，与通常铁基材料不同，变形导致Ｆｅ－Ｎｂ－Ｃ合金的ｈｓ增强：对于含Ｎｂ（≥０．０６％，质量分数，下同）较低的合金，“Ｓｎｏｅｋ阻尼温区”（温－１５０℃）内耗增强显著，其Ｓｎｏｅｋ峰高温支明显抬起、甚至形成混合双峰；对于含Ｎｂ≥０．３％的合金．ｈｓ增强甚微，仍是一对称的Ｓｎｏｅｋ峰，并在８０—１３０℃间形成一分立峰，降温ＳＫＫ峰向低温移动，但峰高（ｈｃＳＫＫ）未减低，含Ｎｂ较低合金的ｈｃＳＫＫ都明显高于ｈｈＳＫＫ．
The internal friction in the Fe-Nb-C alloys was measured, It was found that the Snoek peak height (h(s)) of the alloys held at 700 degreesC for 1 h and quenched in water is lower, and the more of niobium the alloy contains, the lower the h(s) is. Unlike general ferro-base materials, the h(s) of the Fe-Nb-C alloys raises after deforming. For the alloys containing Nb greater than or equal to0.06%(mass fraction), the enlargement of the internal friction in the temperature range of Snoek damping (from room temperature to 150 degreesC) is obvious, and the high-temperature branch of Snoek peak is evidently raised, or even developed to form a mixing double peak. For the alloys containing Nb greater than or equal to0.33%, the h, is slightly enlarged, so that a Snoek peak and a peak between 80 degreesC and 130 degreesC can be observed. There are SKK peaks in all the h alloys deformed, while the heights of the SKK peaks(h(SKK)(h)) in the alloys containing low niobium are lower. The SKK peaks measured during decreasing temperature all shift toward lower temperature; however, their heights(h(SKK)(h)) do not reduce, while the h(SKK)(c) in the alloys containing less niobium are all obviously higher than their h(SKK)(h).
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第11期1169-1173,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金资助项目 59771045
