Production technology for casting wear-resistant thin plates by compounding double liquid metals
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A dual-liquid dual-metal, composite casting technology, applied in metal processing equipment, manufacturing tools, casting and molding equipment, etc., to avoid microscopic crack sources
Inactive Publication Date: 2014-12-03
JIAMUSI UNIVERSITY
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[0003] In order to solve the shortcomings of the existing surfacing wear-resistant plate production process, the present invention provides a production process for double-liquid bimetal composite casting wear-resistant thin plate
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Embodiment 1
[0033] This embodiment provides a production process for a double-liquid bimetal composite casting wear-resistant thin plate, such as Figure 1-2 As shown, the specific steps are as follows:
[0034] KGPS-800 type 150kg and 250kg intermediate frequency melting furnaces, one set each, and the molding material is CO 2 Hardened sodium silicate sand, reserved anti-deformation amount of 3mm / m, combined with special chilling material (placed on the lower side of the middle area of the cavity) to change the traditional double pouring system design, and carry out the flat casting molding of the double pouring system, which is convenient for pouring Adjustment of the temperature field after the molten metal. The chilling material is formed by mixing zircon sand, steel shot and water glass in a mass ratio of 7:90:3.
[0039] KGPS-800 type 150kg and 250kg intermediate frequency melting furnaces, one set each, and the molding material is CO 2 For hardened water glass sand, the reserved anti-deformation amount is 2mm / m. The chilling material is made of zircon sand, steel shot and water glass mixed according to the mass ratio of 5:92:3, and placed on the lower side of the middle area of the cavity. Alloy composition design: low alloy steel, C: 0.36wt%, Cr: 1.0wt%, Mn: 1.3wt%, Si: 1.8wt%, RE: trace, S, P: ≤0.05wt%; high carbon high alloy steel , C: 2.05wt%, Cr: 12.5wt%, W: 1.3wt%; Mn: 0.8wt%, Si: 0.3wt%, S, P: ≤ 0.05wt%. The minimum height of the low-alloy molten steel poured into the base material can be controlled above 10mm, and the pouring temperature is 1450°C. According to the size and thickness of the wear-resistant layer, the time interval for pouring the high-carbon and high-alloy molten steel of the wear-resistant layer is 5 ~15s, the pouring temperature is 1550°C. The process is a...
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Abstract
The invention discloses a production technology for casting wear-resistant thin plates by compounding double liquid metals, and aims to replace the conventional build-up welding abrasion-resistant plate production technology with the production technology. The production technology disclosed by the invention comprises the following steps: a gravity casting double casting system is combined with a casting technology; a special chilling material is used for adjusting the temperature fields of molten metals entering a cavity to ensure that the temperature gradient of the part I, in contact with the chilling material, of a first molten metal entering the cavity first is larger, while the temperature gradient of the part II, far away from the chilling material, of the first molten metal is smaller; pouring a second molten metal into the rest space of the cavity after the part I of the first molten metal is in a solid phase and the part II of the first molten metal is in a solid-liquid phase or a liquid phase, so as to ensure that the two molten metals are combined metallurgically but not mixed. Through the adoption of the production technology, under the premise that the metallurgical quality of a metal of a wear layer is superior, the dilution effect of a base material to the alloying constituent of the wear layer is effectively reduced.
Description
technical field [0001] The invention relates to a production process of double-liquid bimetal composite casting wear-resistant thin plate, which is used to replace the existing surfacing welding wear-resistant plate production process. Background technique [0002] At present, the wear-resistant composite steel plate mainly adopts the automatic welding process, and the high-hardness self-shielding alloy welding wire is evenly welded on the surface of the ordinary low-carbon steel or low-carbon low-alloy steel plate substrate, and the number of composite layers is one to two or even multiple layers. Prepared as a bimetal overlay wear-resistant plate. The surfacing process of bimetal composite wear-resistant steel plate is a non-uniform heating process, and a large welding residual stress is generated during surfacing welding, which is an obvious feature of surfacing wear-resistant plates. During the composite process, due to the different shrinkage ratio of the alloy, unifor...
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