NiAl-Cr(Mo) biphase eutectic crystal intermetallic compound modified by W
A technology of intermetallic compounds and eutectic metals, which is applied in the field of W-modified NiAl-Cr(Mo) dual-phase eutectic intermetallic compounds, can solve the problems of not being able to meet the requirements of use and little improvement in high-temperature strength, and achieve improved Room temperature plasticity, good comprehensive performance, and the effect of improving high temperature strength
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Embodiment 1
[0030] Example 1: Preparation of 33Ni-23Al-30Cr-4Mo-10W intermetallic compound
[0031] The ingredients are formulated according to the composition of 33Ni-23Al-30Cr-4Mo-10W (atomic percentage), and the purity of the raw materials is 99.999%.
[0032] Melting 33Ni-23Al-30Cr-4Mo-10W alloy ingots in a non-consumable vacuum electric arc furnace with a vacuum degree of 5×10 -3 Pa, smelting temperature 3500°C, smelting 6 times, the raw materials are smelted evenly.
[0033] 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.
[0034] 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-23Al-30Cr-4Mo-10W ingot by wire cutting method for mechanical performance testing.
[0035] Accurate to 10 with Model 1111 -4 The mass M of the sample is measured by an electr...
Embodiment 2
[0037] Example 2: Preparation of 33Ni-30Al-30Cr-4Mo-3W intermetallic compound
[0038] The ingredients are formulated according to the composition of 33Ni-30Al-30Cr-4Mo-3W (atomic percentage), and the purity of the raw materials is 99.999%.
[0039] Melting 33Ni-30Al-30Cr-4Mo-3W alloy ingots in a non-consumable vacuum electric arc furnace with a vacuum degree of 4×10- 3 Pa, smelting temperature 3700°C, smelting 4 times, the raw materials are smelted evenly.
[0040] 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.
[0041] The mechanical property testing conditions of 33Ni-30Al-30Cr-4Mo-3W intermetallic compound are the same as in Example 1, and its density is 7.02g / cm 3 ; see figure 2 As shown in the figure, the yield strength at 25°C is 1300MPa, and the compressive plasticity is greater than 15%; the yield strength at 800°C is 280MPa, and the com...
Embodiment 3
[0042] Example 3: Preparation of 33Ni-28Al-30Cr-4Mo-5W intermetallic compound
[0043] The ingredients are Ni-28Al-30Cr-4Mo-5W (atomic percentage), and the purity of the raw materials is 99.999%.
[0044] Melting 33Ni-28Al-30Cr-4Mo-5W alloy ingots in a non-consumable vacuum electric arc furnace with a vacuum degree of 3×10 -3 Pa, smelting temperature 3800°C, smelting 4 times, the raw materials are smelted evenly.
[0045] 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.
[0046] A cylinder sample with a diameter of 6 mm and a height of 9 mm and a square cylinder with a diameter of 6 mm × 6 mm × 30 mm were cut from the heat-treated 33Ni-28Al-30Cr-4Mo-5W ingot by wire cutting method for mechanical property testing.
[0047] The mechanical property testing conditions of 33Ni-28Al-30Cr-4Mo-5W intermetallic compound are the same as in Example 1, and its d...
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