Reasons for brittle fracture of stainless steel castings:
1. The amount of deoxidizer-aluminium used in smelting is too high, and the combination of deoxidizer-aluminium and nitriding in steel can easily form an aluminium nitride inclusion and make the castings brittle and fractured.
2. The excessive amount of boric acid in lining construction results in the occurrence of carbon and boron compounds in steel.
3. Excessive carbon content and other alloying elements beyond the allowable scale will also increase the brittleness of steel. For example, when carburizing with pig iron, if the feeding is not carefully or without accounting, harmful elements will be brought into the steel.
4. Severe overheating of molten steel and improper heat treatment operation resulted in coarse grains.
Located in Xuejiaduan, Xinbei Development Zone, Changzhou Champion Mechanical and Electrical Manufacturing Co., Ltd. is a private enterprise specializing in foundry, R&D, production, sales and service. Founded in 2000, it mainly produces gray iron castings and low temperature ductile iron series products, including nodular iron castings brand QT350-20, QT400-18, QT450-10, QT500-7, QT600-3, QT800-2, gray iron castings brand HT200, HT250, HT300, etc., mainly for wind power, elevators, reducers, rail transit, large lathe parts, metallurgical equipment supporting.
After years of innovation and innovation, the company has advanced equipment. There are two resin sand automatic production lines and one iron sand casting production line, one clay sand moulding line, two 10-ton electric furnaces, one 2-ton electric furnaces, four 1-ton electric furnaces and post-processing equipment for castings such as large shot blasting machines and heat treatment furnaces, with an annual output of 20,000 tons. The processing equipment includes large gantry, Taiwan Youjia and Shenyang machine tools. More than 40 sets of various processing centers and CNC lathes of Xinrui and other brands. The testing equipment is complete, including German imported direct reading spectrometer, computer metallographic analyzer, universal tensile testing machine, cryogenic impact analyzer, fast carbon-silicon analyzer, ultrasonic flaw detector and so on.
In order to ensure good product quality, the company further improves the management system, standardizes the management process, clarifies the management responsibility, consolidates the management foundation, takes customer's demand as the core of service, and creates customer satisfaction products with the most professional service!