There are two process schemes of low-temperature fast casting and high-temperature slow casting for nodular iron castings of wind power hub. (1) Low temperature quick Pouring Scheme: the low temperature quick pouring scheme fully considers the characteristics of furan resin sand, such as good thermal insulation, easy sand washing,...
1. Test process parameters Three nodular iron castings were tested and poured. The main parameters during the test are: the tapping temperature of molten iron is 1492 ℃; Pouring temperature: 1386 ~ 1362 ℃; The pouring time is 21 s, 18 s and 20 s respectively; The pouring temperature...
The influence of carbon and silicon content on the quality of nodular iron castings is shown in the figure below: It can be seen from the figure that the optimum carbon and silicon contents of nodular iron castings are 3.4-3.85% C and 2.0-2.75% Si respectively, and the carbon equivalent...
In order to reconfirm the defects of the nodular iron casting and the rationality of the analysis results, the CAE filling simulation of the original process scheme was carried out. The filling parameters of nodular iron castings are set as pouring mass of 87 kg, pouring temperature of 1420...
According to the analysis of the casting structure and key casting technology difficulties of the intake cylinder, this paper mainly focuses on the theoretical research, design and calculation of the core casting technology scheme and process of the intake cylinder, and determines the final optimization process technology scheme. In...
According to the data reported by China Foundry Association at the industry annual meeting in recent years, the total amount of nodular cast iron castings has increased by about 5% in recent years. In 2016, the total amount of ductile iron castings reached 13.2 million tons, which was higher...
Ductile iron is an important kind of strong and tough cast iron, which has been fully used in heavy and large load-bearing structural parts such as engineering machinery, energy machinery, national defense and military industry. Especially in the environment with high requirements for plasticity, toughness and anti-seismic wear resistance,...
The feeding riser must be large enough to supply additional liquid metal during liquid shrinkage until the temperature drops below the solid phase line and the parts begin to solidify. In the same way, the modulus can be used to evaluate the shrinkage of riser, MC is the modulus...
After the casting spheroidization problem appeared, our company’s technical, quality, physical and chemical department and other departments jointly analyzed, according to the actual production, the rectification measures were determined. 1) Standardize the operation procedures and control the pouring time. 2) Adjust the blowing in sequence, the first furnace smelting...
After the occurrence of bad nodularity, our plant strengthened the detection of sulfur in the original molten iron and the molten iron after spheroidizing treatment, as well as the control of the use of recycled materials to prevent such problems. In order to produce high quality nodular iron castings,...