1.Application of steel castings on tanks and armored vehicles
Tank armored vehicle is composed of control part, power part, action part and combat part. The control part is the cab, and the internal equipment includes control mechanism, detection instrument, driving chair, etc; The power part is the power room, and the internal equipment includes the engine and its auxiliary system, transmission device, etc; The action part is the track shoe part, and the internal equipment includes track propulsion device and suspension device; The combat part is the combat chamber, and the internal equipment includes turret and turret seat ring. The survey found that only the power part and action part have demand for steel castings, as shown in the table.
| Composition structure | Casting demand | Texture of material | Weight | Requirement | Remarks |
| Power part | Gas turbine gasifier room | Cylinder block cb-7cu martensitic stainless steel | 208 kg | Domestic diesel power systems have no demand for steel castings, and there are a small number of gas turbine powered tanks in the United States | Liquid penetrant test and X-ray inspection are required |
| Power part | Reducer box | ZG32MnMo | 3.4 kg～20 kg | Less than 500 kg / year | Some cast steel and some cast iron HT500 |
| Action part | Driving wheel | HT200 | 2 350 kg | 2 per tank per year | Nothing |
| Action part | Track shoe | High manganese steel ZG28MnNi | 38 kg～1 000 kg | At least 3000 tons per year | Nothing |
2.Application of steel castings in missile weapons
The castings of missile weapons are mainly used in missile launchers. The material requirements are aluminum silicon cast aluminum alloy ZL104. It is easy to produce defects such as thick sand and suspended sand on the surface of aluminum alloy castings, which can reduce the defects of different thickness and suspended sand on the surface of aluminum alloy castings.
3.Application of steel castings in space equipment
The demand for steel castings in space equipment is concentrated on the nozzle and head of solid motor. The materials are 30CrMnSiA / zg45# and 1Cr18Ni9Ti respectively. They are light and belong to small steel castings. The demand unit is the Sixth Research Institute of China Aerospace Science and Industry Corporation.