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MgO-Y2O3-based crucible for ultra-vacuum melting of Ni-TiAl alloy and preparation method of MgO-Y2O3-based crucible
The invention discloses a MgO-Y2O3-based crucible for ultra-vacuum melting of a Ni-TiAl alloy and a preparation method of the MgO-Y2O3-based crucible. The technical scheme of the invention is as follows: the chemical components of the invention are as follows: a MgO-Y2O3-based light refractory raw material with a core-shell structure (called MgO-Y2O3 for short) is taken as a raw material (wherein three grain sizes are aggregates and one fine powder is taken as a matrix), pure calcium aluminate is taken as a binding agent, and CaF2 is taken as an additive. The preparation method comprises the following steps: putting the aggregate into a stirrer, uniformly mixing, adding the matrix and the binding agent, and stirring; and then adding the CaF2 suspension turbid solution at a constant speed, uniformly mixing, carrying out vacuum casting molding, drying, carrying out heat preservation for 2-5 hours under the condition of 1100-1300 DEG C, and carrying out heat preservation for 4-8 hours under the condition of 1650-1780 DEG C, so as to obtain the MgO-Y2O3-based crucible for ultra-vacuum melting of the Ni-TiAl alloy. The prepared product is low in vacuum volatilization rate, long in service life, free of pollution to smelting melt, capable of being used circularly and intermittently and good in thermal shock resistance.
本发明公开了一种超真空熔炼Ni‑TiAl合金用MgO‑Y2O3基坩埚及其制备方法。其技术方案是：本发明的化学组分是，以“具有核壳结构的MgO‑Y2O3基轻质耐火原料”(简称MgO‑Y2O3)为原料(其中：三种颗粒级为骨料和一种细粉为基质)，以纯铝酸钙为结合剂和CaF2为添加剂。本发明的制备方法是：将所述骨料置于搅拌器内，混匀，加入基质和结合剂，搅拌；然后匀速加入CaF2悬浮浑浊液，混匀，真空浇注成型，干燥，在1100℃～1300℃条件下保温2～5小时，在1650℃～1780℃条件下保温4～8小时，得到超真空熔炼Ni‑TiAl合金用MgO‑Y2O3基坩埚。本发明所制制品具有真空挥发率低、使用寿命长、不污染冶炼熔体、能循环间歇使用和热震稳定性好。
MgO-Y2O3-based crucible for ultra-vacuum melting of Ni-TiAl alloy and preparation method of MgO-Y2O3-based crucible
The invention discloses a MgO-Y2O3-based crucible for ultra-vacuum melting of a Ni-TiAl alloy and a preparation method of the MgO-Y2O3-based crucible. The technical scheme of the invention is as follows: the chemical components of the invention are as follows: a MgO-Y2O3-based light refractory raw material with a core-shell structure (called MgO-Y2O3 for short) is taken as a raw material (wherein three grain sizes are aggregates and one fine powder is taken as a matrix), pure calcium aluminate is taken as a binding agent, and CaF2 is taken as an additive. The preparation method comprises the following steps: putting the aggregate into a stirrer, uniformly mixing, adding the matrix and the binding agent, and stirring; and then adding the CaF2 suspension turbid solution at a constant speed, uniformly mixing, carrying out vacuum casting molding, drying, carrying out heat preservation for 2-5 hours under the condition of 1100-1300 DEG C, and carrying out heat preservation for 4-8 hours under the condition of 1650-1780 DEG C, so as to obtain the MgO-Y2O3-based crucible for ultra-vacuum melting of the Ni-TiAl alloy. The prepared product is low in vacuum volatilization rate, long in service life, free of pollution to smelting melt, capable of being used circularly and intermittently and good in thermal shock resistance.
本发明公开了一种超真空熔炼Ni‑TiAl合金用MgO‑Y2O3基坩埚及其制备方法。其技术方案是：本发明的化学组分是，以“具有核壳结构的MgO‑Y2O3基轻质耐火原料”(简称MgO‑Y2O3)为原料(其中：三种颗粒级为骨料和一种细粉为基质)，以纯铝酸钙为结合剂和CaF2为添加剂。本发明的制备方法是：将所述骨料置于搅拌器内，混匀，加入基质和结合剂，搅拌；然后匀速加入CaF2悬浮浑浊液，混匀，真空浇注成型，干燥，在1100℃～1300℃条件下保温2～5小时，在1650℃～1780℃条件下保温4～8小时，得到超真空熔炼Ni‑TiAl合金用MgO‑Y2O3基坩埚。本发明所制制品具有真空挥发率低、使用寿命长、不污染冶炼熔体、能循环间歇使用和热震稳定性好。
MgO-Y2O3-based crucible for ultra-vacuum melting of Ni-TiAl alloy and preparation method of MgO-Y2O3-based crucible
一种超真空熔炼Ni-TiAl合金用MgO-Y2O3基坩埚及其制备方法
CHEN JUNFENG (Autor:in) / HOU XIANGSHUAI (Autor:in) / CHEN QIANLIN (Autor:in) / ZHANG YU (Autor:in) / YAN WEN (Autor:in) / LI NAN (Autor:in)
04.06.2024
Patent
Elektronische Ressource
Chinesisch
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