Heat treatment method for improving hardness of high-temperature titanium alloy base composite materials
A technology of high-temperature titanium alloy and heat treatment method, which is applied in the field of titanium-based composite materials, can solve problems such as the decline of high-temperature performance, and achieve the effects of improved compactness and friction and wear performance, uniform dispersion and dense material.
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Embodiment 1
[0026] A heat treatment method (HT1) for improving the hardness of a high-temperature titanium alloy-based composite material, which includes the following steps:
[0027] First, weigh 10wt.%SiC p , put into a ball mill and add absolute ethanol, wet mill SiC p 24 hours; ball mill speed 300±50r / min, ball to material ratio 6:1
[0028] Secondly, SiC p After the wet grinding is completed, weigh 90 wt.% of the matrix powder (composed of 90wt.% high-temperature resistant Ti750 alloy and 10wt.% pure Ti, taking 100 grams of powder as an example, SiC p 10 grams, 81 grams of high-temperature-resistant Ti750 alloy and 9 grams of pure Ti) are placed in a ball mill jar, and the mixed powder is wet-milled at a wet-milling speed of 300±50r / min, and the wet-milling medium is absolute ethanol for 48 hours;
[0029] Then, put the wet-milled mixed powder into an oven for drying, the drying time is 12 hours, and the drying temperature is 60±5°C. The dried mixed powder is placed in a ball mil...
Embodiment 2
[0036] A heat treatment method (HT2) for improving the hardness of high-temperature titanium alloy matrix composites.
[0037] This embodiment is similar to the embodiment, except that the HT2 heat treatment process is adopted for the sintered block, and the specific heat treatment process parameters are shown in Table 1.
[0038] Ti-10SiC prepared by the above steps p Mixed powder grain refinement, Ti generated by in-situ reaction during sintering 5 Si 3 , TiC enhanced phase. figure 2(b) is the metallographic structure diagram of the sintered block after HT2 heat treatment in the embodiment of the present invention. The surface area of the sintered block after heat treatment is flat and dense, and the sintering quality is good, which reflects the preparation of new titanium matrix composite materials by this process of excellence. image 3 It is the XRD pattern of the composite material after the HT2 solid solution aging process in the embodiment of the present inventi...
Embodiment 3
[0040] A heat treatment method (HT5) for improving the hardness of high-temperature titanium alloy matrix composites.
[0041] This embodiment is the same as the embodiment, except that the HT5 heat treatment process is adopted for the sintered block, and the specific heat treatment process parameters are shown in Table 1.
[0042] Ti-10SiC prepared by the above steps p Mixed powder grain refinement, Ti generated by in-situ reaction during sintering 5 Si 3 , TiC enhanced phase. figure 2 (e) is the metallographic structure diagram of the sintered block in the embodiment of the present invention after HT5 heat treatment. The surface area of the sintered block after heat treatment is smooth and dense, and the sintering quality is good, which reflects the preparation of new titanium-based composite materials by this process. of excellence. Figure 4 It is the XRD pattern of the composite material after HT5 solid solution aging process treatment in the embodiment of the pres...
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Abstract
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