Test block No. C Si Mn P Cu Mo S RE Mg Y30-1 3.37 2.25 0.58 0.022 0.53 0.32 0.01 0.0059 0.045 Y30-2 3.29 2.28 0.56 0.023 0.52 0.32 0.009 0.0055 0.047 Y30-3 3.33 2.23 0.55 0.019 0.55 0.33 0.009 0.006 0.041 The chemical composition and mechanical properties of...
Three wear-resistant pump body castings were poured in production, and three attached cast test blocks were taken. The numbers of the three attached cast test blocks were y30-1, y30-2 and y30-3, and the size of the attached cast test block was 180 mm × 30 mm × 85 mm....
1. Spheroidization Select the spheroidizing method of the dam type spheroidizing ladle rushing method, select the mixed rare earth spheroidizing agent with a mass fraction of 5% ~ 6% magnesium and 0.4% ~ 0.6% rare earth, and add 1.20% ~ 1.30% of the spheroidizing agent. Use the carbon and...
During the use of the wear-resistant pump body casting, the high-density hard particles move close to the cavity wall, thereby causing scouring and great friction damage to the inner wall of the flow-through parts. Therefore, the wear-resistant pump body casting itself needs to have high wear resistance. Wear resistant...
1. Selection of C and Si For wear-resistant pump body castings, the selection of C content should not only ensure the requirement of sufficient graphitization, but also take into account the risk of graphite floating in the casting process. Therefore ω (C) 3.65% ~ 3.80%; Si strongly promotes graphitization,...
The wear-resistant pump body casting is the main part of the pumping system. As the pumping system used in mining machinery and equipment contains hard particles, during the pumping process, due to vortex centrifugation and gravity, the high-density hard particles move close to the cavity wall, thereby causing erosion...
Furan resin sand is used for molding, and the 24h strength of sand mold (core) is controlled σ b≥1.0 MPa； The rigidity of the sand box used for molding should be good, and the sand consumption of the mold should be large enough to ensure the overall rigidity of...
The castings without riser system were introduced into magma, and the pouring posture of the connecting flange at the top and bottom was respectively used for simulation. The starting temperature was 1580 ℃, and the defect prediction results were obtained, as shown in Fig. 1 and Fig. 2. It...
Fig. 1 shows the current mainstream pump casing casting process. The water system is injected at the parting surface height through risers respectively located at the foundation support and the outlet flange. The casting process gating system has the following defects: (1) The drop of internal water outlet is...
The dual-phase steel pump casing has the common characteristics of cast steel: high melting point, poor fluidity, large shrinkage, easy oxidation and inclusion. Generally speaking, it is a material with poor casting process. The design of the pouring system of the pump casing steel castings has the following requirements:...