一种市政工程用球墨铸铁泵及其制备方法
By optimizing the chemical composition and preparation process, and combining multiple inoculation treatments and wire feeding methods, the problems of strength, toughness and corrosion resistance of spherical cast iron pumps for municipal engineering have been solved, and stable and efficient cast iron pumps have been prepared.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGGUO DONGFANG MILLING MATERIAL CO LTD
- Filing Date
- 2023-02-23
- Publication Date
- 2026-07-17
AI Technical Summary
Existing spheroidal cast iron pumps used in municipal engineering projects cannot simultaneously meet the requirements of high strength, toughness, and corrosion resistance. Furthermore, the spheroidization and inoculation processes during casting are unstable, resulting in uneven performance.
By optimizing the chemical composition ratio and adding elements such as Cr, Cu, Ni, Ti, Nb, Mg, and Re, combined with multiple inoculation techniques and wire feeding methods, ductile iron pumps were prepared to form hard phase carbides, which improved toughness and corrosion resistance. The use of double wire feeding and in-flow inoculation treatment ensured the spheroidization rate and performance stability.
It achieves high hardness, toughness and excellent corrosion resistance in ductile iron pumps, meeting the long-term use requirements of pump bodies for municipal engineering and improving performance stability.
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