A high temperature resistant boat suitable for reducing environment
A high temperature, boat technology, applied in the boat field, can solve problems such as work
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Embodiment 1
[0026] In the raw material preparation process: prepare Cr with a purity of 99.9%, Ni with a purity of 99.9%, Fe with a purity of 99.9% and Ta with a purity of 99.9%, and prepare them in wt%. The content of each element is shown in Table 1, and each serial number group was prepared according to the element composition in Table 1, and 8Kg of raw materials were weighed and prepared respectively.
[0027] The raw materials prepared in each embodiment and comparative example were mixed evenly, then vacuum smelted in a vacuum induction melting furnace, and poured into an investment mold to obtain a boat. The boat performance of each embodiment and comparative example is as shown in table 1:
[0028] Proportioning (wt%) and performance of each element of table 1
[0029]
[0030] The detection of the yield strength in the present invention is carried out at normal temperature, but we found in the production process that there is a corresponding relationship between the normal te...
Embodiment 2
[0045] In the raw material preparation process: prepare Cr, Fe, Ta, Nb, Ni, C, B, Al and Ti with a purity of 99.9%, and prepare them in wt%. Each serial number group was prepared according to the element composition in Table 4, and 8Kg of raw materials were weighed and prepared respectively.
[0046] The raw materials prepared in each embodiment and comparative example were mixed uniformly, vacuum smelted in a vacuum induction melting furnace, poured into an investment mold, and a boat was obtained. The boat performance of each embodiment and comparative example is as shown in table 4:
[0047] Table 4 Proportion (wt%) and performance of each element
[0048]
[0049] The detection of the yield strength in the present invention is carried out at normal temperature, which is the same as in Example 1. During the production process, we found that there is a corresponding relationship between the yield strength at normal temperature and the yield strength at high temperature. ...
Embodiment 3
[0061] The difference between Example 3 and Example 1.1 is that the surface of the boat prepared in Example 1.1 is coated with Ni plasma with a thickness of 5 μm to 20 μm.
[0062] Add tungsten trioxide as shown in Table 7 to the boats obtained in each embodiment.
[0063] Table 7 Proportion of each element (wt%)
[0064]
[0065] The loading capacity of the boat is controlled at 1.1kg; the pushing speed is controlled at 11min; the hydrogen flow rate is controlled at 25m 3 / h, its purity is greater than 99.999%; H 2 Dew point: -20℃~-10℃; the reduction temperature is divided into three zones, which are controlled respectively: The time is 150 minutes each.
[0066] After reduction in the aforementioned boat, even at higher humidity of H 2 In the atmosphere, no hydrogen embrittlement of the boat at high temperature and cracks and peeling off of the boat surface were observed.
[0067] The boat has been used continuously for three months, and the purity of the high-purity...
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Abstract
Description
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