本发明公开了一种高强抗氧化Ni-Cr-Fe基耐热合金，属于耐热合金技术领域。按重量百分比计，该合金化学成分为：C 0.01～0.1％，Cr 18～26％，Fe 15～25％，Mo 0.8～3.0％，Nb 0.8～1.5％，Al 0.5～1.2％，Ti 0.8～1 .5％，Ta 0～0.6％，B 0.001～0.008％，P 0.002～0.06％，余量为Ni及不可避免的杂质。该合金在适用温度范围内在合金表面形成致密、连续且稳定的保护性外氧化层，在外氧化层下形成根状内氧化层，从而使合金具有优异的抗氧化性，同时合金具有高的蠕变强度、塑性和工艺性等，适用于制造在600～750℃条件下长期服役的部件。

The invention discloses a Ni-Cr-Fe-based heat resisting alloy with high oxidation resistance, which belongs to the technical field of heat resisting alloy. The compositions of the alloys (wt.%) are: C 0.01 ~ 0.1%, Cr 18 ~ 26%, Fe 15 ~ 25%, Mo 0.8 ~ 3.0%, Nb 0.8 ~ 1.5%, Al 0.5 ~ 1.2%, Ti 0.8 ~ 1.5%, Ta 0 ~ 0.6%, B 0.001 ~ 0.008%, P 0.002 ~ 0.06%, Ni balance and unavoidable impurities. The surface of the alloy forms a dense, continuous and stable protective oxide layer within the applicable temperature range. Therefore, the alloy has excellent oxidation resistance. In addition, the alloy possesses high creep strength, plasticity and manufacturability, and so on. The alloy is suitable for manufacturing in 600 ~ 750 ℃ under the condition of service parts for a long time.