Quality control system analysis of high manganese steel castings in crusher parts
Release time:
2025-03-21 09:30
With the upgrading of domestic crushing equipment manufacturing technology, High manganese steel castings are widely used as core crusher accessories in wear-resistant parts such as jaw plates and hammers. The production of such special cast steel parts has significant process characteristics: a single-piece, small-batch production mode is adopted, mainly relying on manual sand mold casting technology, and its quality control system involves multi-dimensional key elements.
I. Key Control Points in the Production Process Chain
● Structural design and process adaptability
The geometric structure of crusher accessories needs to balance wear resistance and the feasibility of casting processes, especially High manganese steel castings the wall thickness transition area needs to be optimized with rounded corners to avoid stress concentration. The casting process design should focus on the impact of the gating system on directional solidification, and optimize process parameters through numerical simulation technology.
● Melting and alloying control
High manganese steel castings The smelting needs to strictly control the carbon-manganese ratio (C/Mn≈1/10), using a double-link process of electric arc furnace + refining furnace, to ensure the purity of the molten steel (S, P≤0.04%). Through argon stirring and vacuum degassing technology, the hydrogen and oxygen content is reduced to below 2ppm to prevent porosity defects.
● Sand system management
A composite system of chromite sand and resin binder is used to ensure that the refractoriness of the molding sand is ≥1580℃, the permeability is >120, and the wet compressive strength is 0.12-0.16MPa. During the molding process, the compactness needs to be controlled within the range of 75-85 units to prevent sand expansion or insufficient permeability.
II. Process Quality Control Elements
● Precise temperature field control
The pouring temperature is controlled at 1480±20℃, and a stepped pouring system is used to achieve sequential solidification. In the heat treatment stage, the furnace temperature uniformity (±15℃) needs to be ensured, the austenitizing treatment temperature is strictly controlled in the range of 1050-1100℃, and the timeliness of water quenching directly affects the wear resistance.
● Environmental parameter monitoring
Establish a constant temperature and humidity system in the casting workshop (temperature 25±3℃, humidity 45±5%), and implement dehumidification process compensation during the rainy season. For High manganese steel castings characteristics, the opening temperature should be controlled below 200℃ to avoid cracks caused by residual stress.
III. Quality Defect Prevention Mechanism
● Establish a process traceability system
Implement traceability from raw material entry to finished product shipment, set up 28 quality control points in key processes, and improve the defect detection rate to 99.6%.
● Failure mode analysis
For the common wear failure of crusher accessories, the manganese-carbon ratio is optimized through metallographic analysis, so that the initial hardness reaches HB200 or more, and after work hardening, it can be increased to HB500 or more, significantly extending the service life.
● Intelligent transformation
Introduce sand mold 3D printing technology to solve the problems of forming complex structures, and apply machine learning algorithms to optimize process parameters, so that High manganese steel castings the pass rate increased from 89% to 96.5%, and the energy consumption per ton decreased by 18%.
Duma Machinery Crusher Accessories High manganese steel castings The UT flaw detection pass rate has been increased to 98.2%, and the installed service life has been extended by more than 30%, providing reliable guarantee for the quality improvement and efficiency increase of the equipment manufacturing industry.
High manganese steel castings,Wear-resistant parts,Crusher parts
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The main products of Duma Machinery include: rolling mortar wall, crushing wall and material dividing plate of cone crusher; jaw plate, side guard plate and pressing strip of jaw crusher; lining plate of ball mill, autogenous mill and other equipment; plate hammer and impact plate of impact crusher; hammer head, screen strip, lining block and other wear-resistant alloy steel parts of metal crusher.
Contact Information
Jiangxi Duma Machinery Manufacturing Co., Ltd.
Address: No.15, Jinhui Road, High-tech Zone, Yushan County, Jiangxi Province
Mobile:13957606188
Telephone:0793-2238555
Mailbox:ceo@dumajx.cn
Chinese website:Duma. Website Wear parts. Website
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