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:...
Sand casting steel rolling stand is a typical large steel casting widely used. It is one of the important components of rolling mill equipment. This piece is a key bearing casting in rolling equipment, which requires high mechanical strength and stiffness. Its quality is directly related to the production...
CB2 cast steel is a heat-resistant steel developed for 630 ℃ ultra supercritical units in the European joint research project cost522 R & D plan. After the development of 620 ℃ high-efficiency ultra supercritical units in China, CB2 cast steel has been used as the manufacturing material for large...
Based on the current manufacturing and use status of CB2 steel castings, in order to grasp the quality differences between CB2 steel castings from different manufacturers, a comprehensive comparative analysis was made on the performance data of domestic and imported CB2 steel castings. The imported manufacturers involved include Voestalpine...
With the increasing requirements of environmental protection, energy conservation and emission reduction, efficient, clean and low emission ultra supercritical power generation technology has become the main development direction of thermal power units in the world. China began to vigorously develop 620 ℃ high-efficiency ultra supercritical power generation technology in...
1. Brushing method Brush the clean surface to be observed with mixed lime water, and block the through-hole within the surface to be tested with putty or rubber plug. After the lime water is dry, place the part to be inspected horizontally downward, brush kerosene on the inner surface...
Some box type steel castings have the functional requirements to prevent the leakage of lubricating oil in the inner cavity during the actual operation. However, for the blank steel castings of sand casting, in order to prevent leakage, air tightness testing is usually required. However, due to the lack...
1. Assign professional personnel to control production quality For enterprises, in order to obtain economic benefits, their products are required to have good quality, and integrity is particularly important for cast steel production. In actual production, relevant staff should strictly follow the relevant requirements of smelting and manufacturing process....