Wear-resistant coating for laser manufacturing of high-speed elevator traction wheel
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A wear-resistant coating, high-speed elevator technology, applied in the field of wear-resistant alloy coating, can solve the problems of different expansion coefficients, large particle size differences, uncontrollable cracks, etc., to improve hardness, improve corrosion resistance, wear resistance, etc. good corrosion performance
Inactive Publication Date: 2017-05-31
SHENYANG DALU LASER COMPLETE EQUIP
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These mixed alloy powders have problems such as uneven mixing, large particle size differences, different melting points, compositional deviations, and different expansion coefficients, which lead to defects such as cracks, pores, segregation, unstable performance, and difficult machining in actual cladding.
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[0015] Example 1.
[0016] Use a 3KW semiconductor laser to laser cladding the traction wheel of a high-speed elevator. The mass percentage of alloying elements in the designed cobalt-based wear-resistant coating is.
[0018] The cladding process parameters are: power: 2500W, spot diameter: 3mm, scanning speed: 1000mm / min, overlap rate: 50%.
[0019] Achieved results: At present, the wear resistance of the cobalt-based alloy coating used for high-speed elevator traction wheels is more than 5 times that of the original casting substrate.
Example Embodiment
[0020] Example 2.
[0021] Use a 3KW semiconductor laser to laser cladding the traction wheel of a high-speed elevator. The mass percentage of alloying elements in the designed cobalt-based wear-resistant coating is.
[0022] C: 1.25%, Cr: 24%, Si: 1.3%, Ni: 1.4%, Mn: 0.13%, Mo: 2.6%, W: 4.5%, Fe: 2.81%, B: 1.7%, and the balance is Co.
[0023] The cladding process parameters are: power: 2500W, spot diameter: 3mm, scanning speed: 1000mm / min, overlap rate: 50%.
[0024] Achieved results: At present, the wear resistance of the cobalt-based alloy coating used for high-speed elevator traction wheels is more than 5 times that of the original casting substrate.
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Abstract
The invention discloses a wear-resistant coating for laser manufacturing of a high-speed elevator traction wheel. The wear-resistant coating is characterized in that a priming coating between a base material and a functional layer is not needed; a semiconductor laser unit is directly used for cladding a cobalt-base alloy wear-resistant coating on a nodular cast iron base material of the elevator traction wheel; and the wear-resistant coating comprises, by weight, 1.1-1.3% of C, 22-24% of Cr, 1.0-1.3% of Si, 1.3-1.5% of Ni, 0.1-0.15% of Mn, 2.5-2.8% of Mo, 4.5-4.7% of W, 2.8-2.9% of Fe, 1.6-1.8% of B, and the balance Co. According to the wear-resistant coating, by regulating the composition proportion of all the elements, an obtained cladding layer is free of inclusions, pores, cracks and other defects and is good in wear resistance and corrosion resistance and suitable for laser cladding of the high-speed elevator traction wheel.
Description
technical field [0001] The invention relates to an alloy material for laser manufacturing of conveying parts, in particular to a wear-resistant alloy coating for laser manufacturing of high-speed elevator traction wheels. Background technique [0002] The elevator traction sheave is a very important part of the elevator. The main form of damage to the elevator traction sheave is damage and corrosion, and the uneven wear between the grooves often causes the failure of the entire part, which eventually leads to the scrapping of the equipment; because the elevator traction sheave has to bear the load of the car, load capacity, counterweight and other devices All dynamic and static loads, so the traction sheave is required to have high strength, good toughness, wear resistance, and impact resistance, so nodular cast iron is often used as a material. In order to reduce the wear of the traction wire rope in the groove of the traction sheave, in addition to selecting a suitable gr...
Claims
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