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A platform for research: civil engineering, architecture and urbanism
Directional solidification BN mold shell capable of resisting 1800 DEG C
The invention relates to a casting shell, in particular to a directional solidification BN shell resistant to 1800 DEG C. The directional solidification BN shell comprises a shell base, a shell body and a pouring cup. The mold shell main body is assembled between the mold shell base and the pouring cup to form a mold shell for directional solidification; and the shell base, the shell main body and the pouring cup are all processed and formed by high-temperature and high-pressure sintered hexagonal boron nitride blocks. Compared with the prior art, the method has the advantages that the advantages of high density, small expansion coefficient, good thermal shock resistance and good machining performance of high-temperature and high-pressure sintered BN are fully exerted, the existing lost wax method preparation process is replaced by a machining and assembling method, and the defects that the surface layer of the BN shell prepared by the lost wax method is easy to fall off and the back layer is insufficient in strength are thoroughly overcome; and the yield and quality of directional solidification preparation of the ultrahigh-temperature alloy can be improved.
本发明涉及一种铸件型壳，具体涉及一种耐1800℃的定向凝固BN型壳，包括型壳底座、型壳主体和浇口杯；所述的型壳主体装配于型壳底座和浇口杯之间，形成用于定向凝固的型壳；型壳底座、型壳主体和浇口杯均由高温高压烧结六方氮化硼块体加工成型。与现有技术相比，本发明充分发挥了高温高压烧结BN致密度高、膨胀系数小、抗热震性好、机加工性能好的优点，采用机械加工和装配的方法替代了已有的失蜡法制备工艺，彻底解决了失蜡法制备BN型壳面层容易脱落、背层强度不够的缺点，有利于提高超高温合金定向凝固制备合格率和质量。
Directional solidification BN mold shell capable of resisting 1800 DEG C
The invention relates to a casting shell, in particular to a directional solidification BN shell resistant to 1800 DEG C. The directional solidification BN shell comprises a shell base, a shell body and a pouring cup. The mold shell main body is assembled between the mold shell base and the pouring cup to form a mold shell for directional solidification; and the shell base, the shell main body and the pouring cup are all processed and formed by high-temperature and high-pressure sintered hexagonal boron nitride blocks. Compared with the prior art, the method has the advantages that the advantages of high density, small expansion coefficient, good thermal shock resistance and good machining performance of high-temperature and high-pressure sintered BN are fully exerted, the existing lost wax method preparation process is replaced by a machining and assembling method, and the defects that the surface layer of the BN shell prepared by the lost wax method is easy to fall off and the back layer is insufficient in strength are thoroughly overcome; and the yield and quality of directional solidification preparation of the ultrahigh-temperature alloy can be improved.
本发明涉及一种铸件型壳，具体涉及一种耐1800℃的定向凝固BN型壳，包括型壳底座、型壳主体和浇口杯；所述的型壳主体装配于型壳底座和浇口杯之间，形成用于定向凝固的型壳；型壳底座、型壳主体和浇口杯均由高温高压烧结六方氮化硼块体加工成型。与现有技术相比，本发明充分发挥了高温高压烧结BN致密度高、膨胀系数小、抗热震性好、机加工性能好的优点，采用机械加工和装配的方法替代了已有的失蜡法制备工艺，彻底解决了失蜡法制备BN型壳面层容易脱落、背层强度不够的缺点，有利于提高超高温合金定向凝固制备合格率和质量。
Directional solidification BN mold shell capable of resisting 1800 DEG C
一种耐1800℃的定向凝固BN型壳
ZENG LONG (author) / CAO BINGQIAN (author) / CHEN SENHONG (author) / LI FEI (author) / XIA MINGXU (author) / LI JIANGUO (author)
2023-09-19
Patent
Electronic Resource
Chinese
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