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发明授权
CN106435279B 一种高强度抗氧化高温合金及其热处理工艺和应用 有权

一种高强度抗氧化高温合金及其热处理工艺和应用
摘要：
本发明公开了一种高强度抗氧化高温合金，其化学组成按重量百分比计为：C≤0.08；Mn≤0.1；Cr 14.0～16.0；Mo 4.5～6.0；Ti 3.35～3.65；Fe 4.0～6.0；Al 4.4～4.8；B 0.05～0.11；余量为Ni和不可避免的杂质。本发明的合金在室温(25℃)的抗拉强度σb≥950N/mm2，屈服强度σ0.2≥790N/mm2，伸长率δ5≥4％，面缩率≥9％；高温持久性能：应力140Mpa、温度980℃，抗拉强度σb≥550N/mm2，屈服强度σ0.2≥260N/mm2，伸长率δ5≥16％，面缩率≥32％；在600℃和900℃下本发明合金的Kp可分别达2.32×10‑20mg2·cm‑4·s‑1和1.23×10‑7mg2·cm‑4·s‑1。本发明还提供了制备上述合金的热处理工艺及该合金在发动机部件上的应用。
摘要（英）：

The invention discloses a high-strength oxidation-resistant high-temperature alloy. The high-strength oxidation-resistant high-temperature alloy comprises, by weight, no more than 0.08% of C, no more than 0.1% of Mn, 14.0-16.0% of Cr, 4.5-6.0% of Mo, 3.35-3.65% of Ti, 4.0-6.0% of Fe, 4.4-4.8% of Al, 0.05-0.11% of B, and the balance Ni and inevitable impurities. At the room temperature (25 DEG C), the tensile strength sigma b of the alloy is equal to or higher than 950N/mm<2>, the yield strength sigma 0.2 of the alloy is equal to or higher than 790N/mm<2>, the elongation delta 5 of the alloy is equal to or higher than 4%, and the reduction of area of the alloy is equal to or higher than 9%. According to the high temperature endurance performance, the stress is 140Mpa, the temperature is 980 DEG C, the tensile strength sigma b is equal to or higher than 550N/mm<2>, the yield strength sigma 0.2 is equal to or higher than 260N/mm<2>, the elongation delta 5 is equal to or higher than 16%, and the reduction of area is equal to or higher than 32%. At the temperature of 600 DEG C and 900 DEG C, Kps of the alloy can reach 2.32*10<-20>mg<2>.cm<-4>.s<-1> and 1.23*10<-7>mg<2>.cm<-4>.s<-1>. The invention further provides the heat treatment technique for preparing the alloy and the application of the alloy used in engine parts.

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