NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by Zr
An intermetallic compound and eutectic metal technology, which is applied in the field of Zr-modified NiAl-Cr(Mo) dual-phase eutectic intermetallic compounds, can solve the problems of little improvement in high temperature strength and inability to meet the requirements of use, and achieve improved The effect of high temperature strength
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Embodiment 1
[0031] Example 1: Preparation of 33Ni-23Al-30Cr-4Mo-10Zr intermetallic compound
[0032] The ingredients are 33Ni-23Al-30Cr-4Mo-10Zr (atomic percentage), and the purity of the raw materials is 99.999%.
[0033] Melting 33Ni-23Al-30Cr-4Mo-10Zr alloy ingots in a non-consumable vacuum electric arc furnace with a vacuum degree of 5×10 -3 Pa, smelting temperature 3000°C, smelting 4 times, the raw materials are smelted evenly.
[0034] The obtained intermetallic compound rod was kept at 1200° C. for 12 hours in a high-temperature heat treatment furnace, and then cooled to room temperature with the furnace.
[0035] A cylinder sample with a diameter of 6mm and a height of 9mm and a square cylinder with a diameter of 6mm×6mm×30mm were cut from the heat-treated 33Ni-23Al-30Cr-4Mo-10Zr ingot by wire cutting method for mechanical performance testing.
[0036] Accurate to 10 with Model 1111 -4 The mass M of the sample is measured by an electronic balance of g with an accuracy of 10 ...
Embodiment 2
[0038] Example 2: Preparation of 33Ni-30Al-30Cr-4Mo-3Zr intermetallic compound
[0039] The ingredients are 33Ni-30Al-30Cr-4Mo-3Zr (atomic percentage), and the purity of the raw materials is 99.999%.
[0040] Melting 33Ni-30Al-30Cr-4Mo-3Zr alloy ingots in a non-consumable vacuum electric arc furnace with a vacuum degree of 3×10 -3 Pa, the melting temperature is 2700°C, smelting 6 times, and the raw materials are smelted evenly.
[0041] The obtained intermetallic compound rod was kept at 1200° C. for 12 hours in a high-temperature heat treatment furnace, and then cooled to room temperature with the furnace.
[0042] The mechanical property testing conditions of 33Ni-30Al-30Cr-4Mo-3Zr intermetallic compound are the same as in Example 1, and its density is 6.24g / cm 3 ; see figure 2 As shown in the figure, the yield strength at 25°C is 1600MPa, and the compressive plasticity is greater than 15%; the yield strength at 800°C is 380MPa, and the compressive plasticity is greate...
Embodiment 3
[0043] Example 3: Preparation of 33Ni-28Al-30Cr-4Mo-5Zr intermetallic compound
[0044] The ingredients are formulated according to the composition of 33Ni-28Al-30Cr-4Mo-5Zr (atomic percentage), and the purity of the raw materials is 99.999%.
[0045] Melting 33Ni-28Al-30Cr-4Mo-5Zr alloy ingots in a non-consumable vacuum electric arc furnace with a vacuum degree of 5×10 -3 Pa, smelting temperature 2500°C, smelting 4 times, the raw materials are smelted evenly.
[0046] The obtained intermetallic compound rod was kept at 1200° C. for 12 hours in a high-temperature heat treatment furnace, and then cooled to room temperature with the furnace.
[0047] A cylindrical sample with a diameter of 6mm and a height of 9mm and a square cylinder with a diameter of 6mm×6mm×30mm were cut from the heat-treated 33Ni-28Al-30Cr-4Mo-5Zr ingot by wire cutting method for mechanical performance testing.
[0048] Accurate to 10 with Model 1111 -4 The mass M of the sample is measured by an electr...
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