Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Refractory material for surface layer of precision casting wax mold
The invention discloses a refractory material for a surface layer of a precision casting wax mold. The material is prepared uniformly mixing, by mass, 75-85% of industrial aluminum oxide, 11-18% of vein quartz and 3-6% of zircon sand, smelting at 2100-2300 DEG C by adopting a three-phase star-shaped electric arc furnace, crushing and grinding. Due to reasonable design and proportioning, the main crystal phases comprise approximately granular corundum and mullite which is continuously distributed; the size of the corundum crystals is about 30-120 microns; besides the two main crystalline phases, a small amount of glass phase and a small amount of zirconium oxide are also included. Demolding is easy, adhesion is avoided, sand burning is little, and the finish degree of a precision casting product is guaranteed. The specific gravity is 3.10 g/cm<3>; the thermal conductivity is high, and the linear expansion coefficient is small and is 5*10<-6>; and deformation, cracks and cracking of theformwork are reduced.
本发明公开了一种精铸腊模的面层耐火材料，它是由下述方法制备的：按质量百分比，工业氧化铝75~85％、脉石英11~18％、锆英砂3~6％，混匀，采用三相星形电弧炉2100~2300℃冶炼，粉碎，研磨；由于设计配料合理，主晶相为近似圆粒状的刚玉和呈连续分布的莫来石；刚玉晶体尺寸约在30~120微米之间；除两种主晶相外，还有少量玻璃相，微量氧化锆；易脱膜，不粘结，粘砂少，保证了精铸产品的光洁度；比重为3.l0g/cm3；热导率大，线膨胀系数小，为5×10‑6；减少了模壳变形、裂纹、开裂的产生。
Refractory material for surface layer of precision casting wax mold
The invention discloses a refractory material for a surface layer of a precision casting wax mold. The material is prepared uniformly mixing, by mass, 75-85% of industrial aluminum oxide, 11-18% of vein quartz and 3-6% of zircon sand, smelting at 2100-2300 DEG C by adopting a three-phase star-shaped electric arc furnace, crushing and grinding. Due to reasonable design and proportioning, the main crystal phases comprise approximately granular corundum and mullite which is continuously distributed; the size of the corundum crystals is about 30-120 microns; besides the two main crystalline phases, a small amount of glass phase and a small amount of zirconium oxide are also included. Demolding is easy, adhesion is avoided, sand burning is little, and the finish degree of a precision casting product is guaranteed. The specific gravity is 3.10 g/cm<3>; the thermal conductivity is high, and the linear expansion coefficient is small and is 5*10<-6>; and deformation, cracks and cracking of theformwork are reduced.
本发明公开了一种精铸腊模的面层耐火材料，它是由下述方法制备的：按质量百分比，工业氧化铝75~85％、脉石英11~18％、锆英砂3~6％，混匀，采用三相星形电弧炉2100~2300℃冶炼，粉碎，研磨；由于设计配料合理，主晶相为近似圆粒状的刚玉和呈连续分布的莫来石；刚玉晶体尺寸约在30~120微米之间；除两种主晶相外，还有少量玻璃相，微量氧化锆；易脱膜，不粘结，粘砂少，保证了精铸产品的光洁度；比重为3.l0g/cm3；热导率大，线膨胀系数小，为5×10‑6；减少了模壳变形、裂纹、开裂的产生。
Refractory material for surface layer of precision casting wax mold
精铸腊模的面层耐火材料
LIU DECHENG (Autor:in) / HUANG WENBO (Autor:in)
17.11.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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