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Due to the small space and large wall thickness in the steam inlet chamber of the inner chamber of the […]

Due to the adoption of a wall riser process for the medium pressure inner cylinder steel casting, the main core

In order to achieve feeding of the riser to the casting, it is necessary to ensure that the solidification time

Due to the high pouring temperature of steel castings, which typically ranges from 1520 to 1620 ℃, the surface of

The material of the guide rail steel castings is ZG32MnMo. Using the company’s current 3T alkaline arc furnace smelting and

Casting shrinkage refers to the shrinkage of the solidification and cooling process of liquid metal, which causes the dimensions of

Casting shrinkage refers to the shrinkage of the solidification and cooling process of liquid metal, which causes the dimensions of

Cast steel has high pouring temperature, poor fluidity, and strong thermal impact and scouring force on the sand mold caused

Determining the pouring position is an important step in casting process design, which is related to the internal quality of

1. Difficulty in mold filling of steel castings According to the casting process manual, when the maximum contour size of

1. Structural characteristics The structure of the guide rail steel casting is shown in figure, with the following structural features.

Based on the analysis of the structural characteristics and casting process difficulties of a certain equipment’s steel casting guide rail,

Due to the defects of insufficient pouring at the top of the cylindrical part of the shell in Scheme 1

The surface quality of steel castings after welding repair shall meet the following requirements: ① For non machined surfaces, the

For welding repair of important steel castings, post weld heat treatment is generally required to eliminate thermal stress after welding

The welding repair of steel castings should be carried out before the heat treatment of the steel castings. All welding

Preheating is a key process to ensure the welding repair performance and quality of steel castings. The preheating temperature required

Before welding repair of steel castings, necessary pre welding preparations should be carried out. Firstly, it is necessary to determine

The chemical composition and mechanical properties of steel castings must comply with the relevant provisions of GB/T 40805-2021 “General Technical

The basic requirements for welding repair of rail vehicle steel castings include: general requirements, enterprise requirements, personnel requirements, environmental requirements,

With the rapid development of high-speed trains in China, the current market holds more than 4000 trains. During the new

As shown in the figure, the steel casting after riser removal and the casting before delivery are shown. This steel