In order to have an effective understanding of vermicular graphite cast iron technology, we must have a comprehensive understanding of its graphite growth state and production mechanism. The graphite in vermicular graphite cast iron is called vermicular graphite cast iron because its production state is vermicular. During the growth...
The effect of semi-solid forming process is better than other methods such as modification. However, the possibility of defects (shrinkage porosity) is increased due to low pouring temperature. Generally, extrusion equipment is required, which is complex and costly. The defects caused by hot rolling are the same as those...
Directional solidification (UDS) is a method to produce eutectic composites or in-situ composites by applying high directional temperature gradient to the specimens during alloy solidification. UDS has the flexibility to adjust the solidification rate (R), solid-liquid interface temperature gradient (GL) and alloy composition (C0). It is a unique technology...
In recent years, with the development of diesel engine to the direction of high power, high strengthening, low noise, low emission and high reliability, the functional chambers of a single casting tend to be integrated, and the structure of some key parts becomes more and more complex, which puts...
At present, the dimension measurement methods commonly used in large steel castings are traditional manual measurement, three-dimensional scriber and so on. Due to the poor measurement accuracy and low efficiency of the traditional three-dimensional scriber, it can not move on the fixed platform and has high requirements for the...
A company in Guangdong has developed the largest integral jaw crusher in China. As the key component of large jaw crusher, the frame is directly related to the service life of the whole machine. It is necessary to ensure that the casting process and structural design of the product...
Due to the limitation of level and time, there are still some work need to be further studied and improved, and some valuable research directions need to be further explored (1) The “translational pressure solidification method” of squeeze casting has not been compared and summarized. In the future, the...
On the basis of lspsf semi-solid pulping process in laboratory, the lspsf control system was upgraded, a set of semi-solid vertical squeeze casting equipment with translational pouring and injection system was designed and developed, and a special squeeze casting mold was developed. High quality semi-solid slurry was produced by...
(1) Preparation and melting of experimental alloy. According to the standard composition of 7075 alloy, the weight of various master alloys is calculated in proportion and then melted. Among them, aluminum ingot al51kg, Al Cu alloy 2.04kg, mg1.5kg, al-20mn alloy 0.45kg, al-10cr alloy 1.32kg, zn3.48kg, Al-5Ti-B alloy 1.2kg. The...
Since the thixotropic properties of semi-solid metals were discovered by American scholars in the 1970s, semi-solid processing technology has been rapidly developed and applied in industry. However, the semi-solid forming technology and theoretical research are far less perfect and mature than all liquid casting and all solid forging, especially...