1. Production examples of Shanghai Heavy Machinery Factory Co., Ltd Located in Minhang District of Shanghai, Shanghai Heavy Machinery Works Co., Ltd. is the largest production base of steel castings and casting refined steel ingots in East China. Relying on the strong rough machining capacity, machining equipment and advanced...
1. Application of resin sand process Ordinary sodium silicate sand process has been used in the production of large steel castings in China since the 1970s. However, with the vigorous development of power, transportation, petrochemical, basic machinery, national defense and other industries, users have higher and higher requirements for...
Large steel castings generally refer to steel castings with a single gross weight of more than 5 t. With China’s vigorous development of power, transportation, petrochemical, basic machinery, national defense and other industries, the demand for large steel castings is increasing. Large steel castings provide blanks for the manufacture...
With the rapid development of economy, the domestic demand for large and complex castings in the fields of automobile, aviation, architecture and military industry is increasing day by day, and the lightweight development trend of large castings is becoming more and more obvious, such as large aluminum alloy automobile...
The manufacturing industry of large steel castings is the basic industry of national equipment manufacturing, and its development level is an important symbol to measure a country’s comprehensive national strength. There are more than 30 large steel casting production enterprises in China, most of which are large and medium-sized...
Different from forged steel parts, steel castings for hull structure have low carbon content and good welding performance. Defective parts are allowed to be repaired by welding. The control of the welding repair process is mainly related to the carbon equivalent of the casting material, the area of the...
Hot crack: the crack is an irregular curve, the inner surface is rough and black brown iron oxide. Cold crack: the crack line is relatively straight, and the inner surface of the crack is clean and metallic luster. Fig. 1 JIS rodless anchor claw root arc surface thermal crack...
1. Manifestations of cold crack defects Under the joint action of welding stress and other embrittlement factors, the bonding force of metal atoms in the local area of the welded joint is destroyed to form a new interface. The gap generated by the new interface is a cold crack...
With the continuous development of wind power generation, the manufacturing requirements of wind power equipment are also increasing. Especially in recent years, the development and improvement of land wind farm has turned the attention of many researchers to the development of offshore wind power, which requires wind power manufacturing...
1. Casting process Fig. 1 is the casting process diagram of the main frame and hub of 6 MW wind turbine generator. Both of them are of multi box shape. The main frame machine adopts the inner sprue and the sprue, which are three sets of independent bottom pouring...