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Application of centrifugal casting: Castings with significant production benefits include: ① Bimetallic cast iron roll; ② Heating furnace bottom heat-resistant steel roller table; ③ Special steel seamless steel pipe; ④ Brake drum, piston ring blank, copper alloy worm gear; ⑤ Special shaped castings such as impellers, metal false teeth, gold and silver mesons, small valves and cast aluminum motor rotors. Centrifugal casting was first used to produce cast pipes, and then this process developed rapidly. Centrifugal casting process is adopted in metallurgy, mining, transportation, irrigation and drainage machinery, aviation, national defense, automobile and other industries at home and abroad to…

The formation of subcutaneous blowholes is a comprehensive reaction of improper operation of each link and process in the casting process. The causes are complex, and there are many influencing factors, involving everyone. Everyone should pay high attention to each process. 1、 Raw materials 1. Raw materials with high content of titanium (Ti) and aluminum (AI), as well as high alloy steel and stainless steel are prohibited. 2. Raw materials that are seriously rusted and oxidized and have a lot of oil, coal sludge and waste sand shall be used after cleaning. 3. Wet raw materials with water shall be…

Sculpture is a form of expression of art. The history of sculpture in the Central Plains can be traced back to the Peiligang Culture more than 8000 years ago. For thousands of years, Central Plains sculpture has always been the leading and symbol of Chinese sculpture. The following section will introduce the process of casting copper sculpture. The cast bronze sculpture is not a general and simple process, but a sculpture cast by professional molds and techniques. Here is a detailed look at the casting process of the cast bronze sculpture: 1. Deepening of design scheme and clay sculpture production:…

With the establishment of the company's multi-ethnic market, the successful development of the multi-ethnic products, and the continuous expansion of the company's business with the recovery of the world economy, not only the customers have higher requirements for product quality, but also the prices of raw materials have increased significantly with the recovery of the economy, leading to the difficulty of casting, an industry with small profits. If you want to make profits in today's society, you must use scientific methods to reduce costs, To improve the yield and yield of castings, the important measures are to design reasonable risers…

In the past 30 years, the application of induction furnace in the casting steel industry has developed rapidly, of course, because it has many advantages, but on the other hand, it also has many disadvantages. When selecting it as smelting equipment, we must conduct comprehensive analysis and research, strive to develop its strengths and avoid its weaknesses, and must not join in the excitement and catch up with the trend. After the equipment is selected, we should have a comprehensive understanding of its characteristics, and strive to continuously improve the quality of casting products on the basis of energy conservation…

The manufacturing costs of different castings in each process are not completely the same, but some links have very small differences, which can be calculated according to the average level. We should pay attention to those factors that have a greater impact on the cost of castings. The main factors leading to the cost difference in the casting production process are as follows: 1. Process yield. Process yield, also known as yield, is the percentage of the actual casting weight in the pouring weight. For specific castings, the process yield is equal to the percentage of the total casting weight…

NDT refers to the defect that does not damage the surface or interior of the casting, or called NDT. There are many NDT test methods, and the following four methods are widely used in production: magnetic particle flaw detection, ultrasonic flaw detection, radiographic flaw detection, and liquid penetrant flaw detection. 1. Magnetic particle flaw detection: ferromagnetic materials such as iron and steel will be subject to this if they pass through a large current or are placed in a magnetic field. For defects on the surface, such as cracks and inclusions, the magnetic line of force is not easy to…

The surface heat treatment is divided into two categories, one is surface quenching and tempering heat treatment, and the other is chemical heat treatment. The hardness test methods are as follows: 1. Surface quenching and tempering heat treatment The surface quenching and tempering heat treatment is usually conducted by induction heating or flame heating. The main technical parameters are surface hardness, local hardness and effective hardened layer depth. The Vickers hardness tester, Rockwell or Superficial Rockwell hardness tester can be used for hardness testing. The selection of test force (scale) is related to the effective hardened case depth and workpiece…

1. Purpose: to standardize the production process, operation contents and methods 2. Scope: applicable to pre-treatment in plastic spraying workshop. 3. Process flow: Degreasing (alkaline) → water washing → rust removal → water washing → neutralization → surface conditioning → phosphating → water washing → post phosphating treatment (spraying) 4. Operation content and key control points: 4.1 Workpiece framing: handle with care to prevent deformation of workpieces. The height shall not exceed the scope of solution blistering (the effect of oil removal and phosphating is better than that of regular oil removal and phosphating when products are placed in a…

The surface performance of die parts is very important to the working performance and service life, such as wear resistance, corrosion resistance, friction coefficient, fatigue performance, etc. It is very limited and uneconomical to rely solely on the improvement and enhancement of the matrix materials. However, through the surface treatment technology, we can get twice the result with half the effort. Therefore, the mold surface treatment technology has been developed rapidly. This technology is a system engineering that changes the shape, chemical composition, structure and stress state of the die surface through surface coating, surface modification or composite treatment technology…