89results about How to "Stable at high temperature" patented technology

The invention discloses a thick-wall cast steel exhaust manifold casting process and belongs to the technical field of exhaust manifold casting. According to the thick-wall cast steel exhaust manifoldcasting process, a thick-wall cast steel exhaust manifold casting mold and method are included. The casting mold comprises a sand mold, feeder heads, a sand core and a pouring system. The sand core is provided with multiple sand jetting openings. The pouring system comprises a sprue bar, a cross gate and an ingate. The sprue bar communicates with the cross gate in a perpendicular manner. A filteris arranged in the middle of the cross gate. The feeder heads comprise the large-face feeder heads, the triangular flange feeder heads, the fire inlet feeder head and the heat preservation feeder head. The fire inlet feeder head is arranged at the tail end of the cross gate. The thick-wall cast steel exhaust manifold casting process is good in mechanical performance, uniform in wall thickness andresistant to high temperature. The thick-wall cast steel exhaust manifold casting mold and method are included. The wall thickness of a casting ranges from 5.5 mm to 6.5 mm, and the weight ranges from 8 Kg to 12 Kg. Technical requirements are met; performance is stable; the problem that molding is difficult to achieve when common casting processes are adopted is solved; and the qualification rateof products is high.