As the core part of diesel engine, the engine block carries all parts of the engine. Its working environment is bad. It bears not only oil pressure and water pressure, but also regular high frequency vibration and impact produced by other parts. Therefore, the quality of engine block blank...
Nodular cast iron intake cylinder is one of the important parts in the front end of heavy duty gas turbine unit. Its main function is to introduce air evenly into the compressor. It is a large pressure bearing component. The outer contour of the intake cylinder casting is bell...
30 casting samples of cylinder block were selected. The pouring information was counted, including the casting mass (unit: kg), pouring time (unit: s), average head (unit: mm), sprue area (unit: cm2), cross runner area (unit: cm2), runner area (unit: cm2), etc. Determine the type of gating system, calculate and...
The results show that the size of the cylinder block is qualified and there is no obvious defect on the surface. The wall thickness of the cylinder bore is uniform, and the wall thickness difference is less than 1.0 mm. The metallographic structure and mechanical properties of the important...
The technological principle of pouring system for cylinder body iron castings is: conveying liquid metal to the inside of the mold steadily and timely; reducing the adverse effects of turbulence, air suction and oxidation of each component in the gating system to the greatest extent; with the functions of...
In the process of pouring, cooling and solidification, the feeding liquid metal passes through the riser, riser neck and the middle split of the cast iron, and finally reaches the area to be fed. At this time, the riser is the main storage unit of feeding molten metal, and...
In the production practice, the shrinkage modulus method is mainly used to design the process riser to complete the feeding of cylinder block iron castings. The shrinkage modulus method follows the equilibrium solidification theory and considers that the shrinkage process of iron castings is a part of the solidification...
The process statistics are as follows: (1) There were 14 cases of L-type engine block and 36 cases of V-type cylinder block; (2) There were 12 cases of HT200 engine block, 28 cases of HT250 engine block and 10 cases of HT250 cylinder block; (3) The distribution of cylinder...
As a key part of engine, cylinder block casting is one of the difficulties in engine production. The design level of gating and riser technology is an important condition to determine the quality and performance of engine production. The engine performance requirements are strict and there are many specifications....
1 Reagent Anhydrous sodium carbonate solid (analytical pure), sodium peroxide solid (analytical pure), nitric acid (analytical pure), sulfuric acid (analytical pure), hydrofluoric acid (analytical pure), high-purity argon (AR > 99.99%) and secondary deionized water for water. Boron standard solution, concentration 1 mg / ml. 2 Instruments Prodigy ICP inductively...