Processing method of high-strength wear-resistant bucket lip of large excavator
A processing method and excavator technology, applied to mechanically driven excavators/dredgers, earth movers/shovels, construction, etc., can solve the problems of long cycle times, affecting the production order of domestic users, and high prices of imported bucket lips. problems, to achieve the effect of short manufacturing time, mature equipment and technology, and shortened delivery cycle
Inactive Publication Date: 2014-12-03
INNER MONGOLIA UNIV OF SCI & TECH
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Problems solved by technology
Casting production is usually used abroad, but because domestic casting technology cannot meet the above performance indicators, and the imported bucket lip is expensive and has a long cycle, which seriously affects the production order of domestic users, so it is necessary to develop a new one based on existing technology and equipment. A new production process to produce products that meet performance indicators
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[0026] Composition design of bucket lip:
[0027] Table 1 Additive components of test steel used in manufacturing bucket lip
[0028]
[0029] Prepare steelmaking materials according to the design composition in Table 1, and use a 50T electric furnace for smelting to ensure that the chemical composition and trace elements of the material are consistent with the design composition. The smelting temperature is controlled at 1580°C±10°C, oxygen is blown, and the temperature is kept for 8 hours. The billet weighed 48.7 tons.
[0030] Vacuum electroslag furnace is used for secondary smelting to reduce harmful components such as S and P, and remove impurity layers at both ends. After electroslag smelting, the size is φ1580mm×2500mm, and the actual weight is 38.47 tons.
[0031] A 2,000-ton hydraulic press is used for blanking, and the length, width, and height dimensions after blanking are 8100 mm×2600 mm×230 mm. After further heating and forging, the final billet size is 268...
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Abstract
The invention discloses a processing method of a high-strength wear-resistant bucket lip of a large excavator. Testing steel for the bucket lip comprises the following chemical components by weight percent: 0.15-0.25% of C, 0.3-0.50% of Si, 1.30-1.60% of Mn, 0.15-0.20% of P, 0.10-0.15% of S, 0.15-0.20% of Al, 1.2-1.50% of Cr, 0.8-2.0% of Ni, 0.4-0.6% of Mo, 0.06-0.08% of Nb, 0.06-0.08% of V, 0.01-0.03% of Ti, and 0.01-0.003% of B. The method comprises the following steps: smelting, cogging, processing and reshaping, modulation treatment, physical and chemical analysis, defect detection and the like. The bucket lip produced by the method can meet the requirements of high strength and high tenacity of the bucket lip, and meanwhile has the characteristics of being good in abrasive resistance, impact resistance, weldability and the like.
Description
technical field [0001] The invention relates to a processing method for a high-strength wear-resistant bucket lip of a large excavator, and belongs to the technical field of large-scale engineering machinery processing and manufacturing. Background technique [0002] The excavator bucket is the main wear part of the excavator. The bucket lip is the key part of the bucket. It connects the bottom of the bucket and the side guard. In addition to high strength and high toughness, it also has the characteristics of wear resistance, impact resistance and good weldability. [0003] The size of the bucket lip is very large, and the length, width and height of the finished product are 4000mm, 350mm, and 140mm respectively. The requirements for material properties including strength, plasticity, wear resistance, weldability and low temperature resistance are very high. The indicators are as follows: The mechanical performance indicators are : Rp0.2≥620 (MPa), Rm≥835(MPa), A%≥13. [...
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IPC IPC(8): C22C38/54C22C33/04C21D8/00B23P15/00E02F3/40E02F9/28
Inventor 龚志华定巍李涛陈延江
Owner INNER MONGOLIA UNIV OF SCI & TECH