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North heavy industry steel casting company successfully trial produced steel ingots with high aspect ratio

North heavy industry steel casting company successfully trial produced steel ingots with high aspect ratio

China Construction Machinery Information

2 Then it is checked that the height diameter ratio of the traditional ingots produced by the cast steel branch of the amplifier unit casting and forging company is generally within the range of 1.8 to 2.5, the appearance is short, thick and fat, the ingot yield is about 85%, and the current market share has gradually declined. In order to optimize the product structure, improve the utilization rate of steel ingots and broaden the market share of steel ingots, since the beginning of the year, the cast steel branch has actively cooperated with Shenyang Metal Research Institute to develop large height diameter ratio steel ingots, and recently successfully trial produced a 14T steel ingot with 42CrMo material and height diameter ratio of 6.0

since the production of steel ingots with large height diameter ratio in China has been in the exploratory stage, there are few production examples and experiences that can be used for reference, such as rubber lined elastic materials in fixtures. With the increase of the height diameter ratio of the ingot, the ingot is prone to crack, segregation, shrinkage cavity and other defects during solidification. There are also a series of technical problems in pure purification smelting, smooth pouring, molten steel self feeding and so on

in order to solve a series of technical problems, cast steel branch has devoted itself to research and bold innovation. Smelting: according to previous smelting experience, it is ensured that the molten steel is oxidized to remove phosphorus within 1580 ~ 1590 ℃ and reduced to desulfurize within 1640 ~ 1645 ℃. The chemical composition is operated according to the medium limit and its uniformity is ensured. The tapping temperature is increased by 70 ℃ at the melting point to prevent defects from smelting. Pouring technology: in view of the long pouring time of fine and high steel ingots, the cooling of exposed steel surface and serious surface oxidation, the technical backbone of the branch and relevant personnel of the metal Institute carefully analyzed, repeated tests and discussions, and finally put forward the pouring method of argon protection. The solidification simulation of molten steel was carried out through ProCAST software. The simulation results were also further discussed by experts from automobile, automobile parts, material supply, colleges and universities on the utilization of plastic materials concerned by the current automobile industry, and the feasibility of the above scheme was affirmed. After determining each process plan, the technology department and the production department jointly organized the production technology review meeting, systematically reviewed the process planning and production arrangement, carefully discussed the control points of each detail, and ensured the smooth production of high aspect ratio ingots. In the process of organizing production, the leaders of the branch company invited PPC of the Metal Research Institute to finally realize the on-site guidance of mass production related personnel, the process personnel conducted detailed process disclosure, and the production personnel implemented the process with high quality. With the cooperation of all departments, the branch successfully trial produced a 14T steel ingot with a material of 42CrMo and a height diameter ratio of 6.0, and all performance indicators reached the target requirements

42crmo ingots with high aspect ratio have been successfully trial produced. The branch company has made a major breakthrough in the production of ingots with high aspect ratio, marking that the production capacity and level of the branch company have reached a new level. At the same time, it has improved the competitiveness of the branch company in the ingot market and laid a good foundation for opening up the ingot Market with high aspect ratio

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