Main casting defects of nodular cast iron
1.Shrinkage cavity, shrinkage porosity and casting defects Due to the characteristics of paste solidification of nodular cast iron, the produced […]
1.Shrinkage cavity, shrinkage porosity and casting defects Due to the characteristics of paste solidification of nodular cast iron, the produced […]
The market has higher and higher requirements for the quality of large and medium-sized steel castings. The castings requiring ultrasonic
The molten metal interacts with the surface of the mold cavity at high temperature. After condensation, a layer of hard
1. Quality control of sodium silicate. “Modulus, concentration” and “guest salt” (NaCI, Na2SO4, Na2CO3, etc.) are important parameters of sodium
The liquid metal penetrates into the gap of molding sand, and after condensation, a layer of mechanical mixture of liquid
Various cast iron codes are composed of the first capital letter of the Chinese pinyin letter representing the characteristics of
There are two main forms of incomplete forming of bucket teeth in Squeeze Casting: incomplete bucket teeth and incomplete forming
Through the simulation analysis of mold filling and solidification process of different pouring schemes, the similarities and differences of mold
1.How to control the pouring temperature? Since lowering the pouring temperature has so many advantages, how can we ensure smooth
The molten steel contains gas in the melting process, which requires pre deoxidation and final deoxidation. If the deoxidation is
(1) There should not be too much recycled sand in the core sand, because there are too many fine sand
Porosity is one of the most common casting defects in castings. According to the different formation mechanism, it is mainly
Reducing pouring “temperature” to reduce sand hole and air hole defects of large steel castings Reducing the pouring “temperature” is
There is a layer of sand particles on the surface of castings that are difficult to remove, which is called
Take the bucket tooth sleeve of loader as an example (as shown in Figure 1). The single blank mass of
① Increase the diameter of ladle nozzle and the size of gating system; ② Increase the number of ladle nozzles;
Therefore, we analyze and sort out the causes of sand sticking in cast wear-resistant low alloy steel and the preventive
A new type of cylinder block EA888 is a high-end sand casting. Due to its complex structure and wall thickness
How to overcome the shortcomings of quartz sand and significantly reduce the sand holes and pores of large and medium-sized
At present, the manufacturing processes of excavator bucket teeth in China mainly include sand casting, forging manufacturing and precision casting.
The bucket teeth on the excavator are the combination of the tooth tip and the tooth seat (see Fig. 1
The casting simulation software ProCAST can predict the casting defects such as shrinkage porosity, shrinkage cavity and slag inclusion in
The process scheme is put into production after being determined by casting CAE simulation, and all valve castings are qualified
The working environment of valve castings for petrochemical industry has the characteristics of high temperature, high pressure and hydrogen (including
Pouring temperature, shell preheating temperature, investment casting pouring speed and other process parameters are very important to the molding quality
After the above improvement measures are taken, the waste of valve castings and the statistics of defect types are shown
According to the causes of valve casting defects, we have taken improvement measures mainly from the following aspects: (1) Properly
There are many reasons for casting defects. Gating system, pouring temperature and flow speed of molten liquid, casting size and
The crack defects can be greatly reduced and eliminated by improving the main key process methods in the manufacture of
Lost foam casting numerical simulation technology has become a powerful simulation and simulation technology, and goes deep into all aspects