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Alloy steel used for casting track plate, track plate and preparation method and construction machinery of track plate

A technology of construction machinery and manufacturing methods, which is applied in the direction of manufacturing tools, tracked vehicles, motor vehicles, etc., can solve the problems of pin lug cracking, extrusion, uneven stretching and impact, and track damage, etc., to achieve increased rigidity , Improve the overall strength and the effect of surface wear resistance

Active Publication Date: 2012-01-04
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when subjected to extrusion, stretching, and impact, the extrusion, stretching, and impact of each pin lug are uneven, which may easily cause the pin lug to crack, and the track (especially the wheel row of the track shoe used to engage with the wheel) Surface 4) is thus damaged

Method used

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  • Alloy steel used for casting track plate, track plate and preparation method and construction machinery of track plate
  • Alloy steel used for casting track plate, track plate and preparation method and construction machinery of track plate
  • Alloy steel used for casting track plate, track plate and preparation method and construction machinery of track plate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Casting was performed using alloy steels having the compositions shown in Table 1. During quenching and tempering treatment: during quenching, heat the casting (ie track shoe) and furnace test rod to 880°C and keep it warm for 2.5 hours, and use water cooling when cooling; after quenching, perform high temperature tempering, and heat the casting and furnace test rod to 600°C and keep it warm for 2.5 hours, and use water cooling when cooling. When the surface is quenched, use a 2.5khz power supply to heat the casting. After the casting is heated to 860°C, spray water to cool it immediately. The depth of the surface quenching layer is 3mm.

[0045] Table 1

[0046] the element

Embodiment 2

[0048] Use the method of embodiment 1 to make track shoe. However, casting was performed using alloy steels having the compositions shown in Table 2. During quenching and tempering treatment: during quenching, heat the casting (ie track shoe) and furnace test rod to 870°C and keep it warm for 2.5 hours, and use water cooling when cooling; after quenching, perform high temperature tempering, and heat the casting and furnace test rod to 580°C and keep it warm for 2.5 hours, and use water cooling when cooling. When surface quenching, use a 3khz power supply to heat the casting. After heating the casting to 870°C, spray water to cool it immediately. The depth of the surface quenching layer is 3.5mm

[0049] Table 2

[0050] the element

Embodiment 3

[0052] Use the method of embodiment 1 to make track shoe. However, casting was performed using alloy steels having the compositions shown in Table 3. During quenching and tempering treatment: during quenching treatment, heat the casting (ie track shoe) and furnace test rod to 860°C and keep it warm for 2.5 hours, and use water cooling when cooling; after quenching, perform high temperature tempering, and heat the casting and furnace test rod to 550°C and keep it warm for 2.5 hours, and use water cooling when cooling. When the surface is quenched, use a 5khz power supply to heat the casting. After heating the casting to 880°C, spray water to cool it immediately. The depth of the surface quenching layer is 4mm

[0053] table 3

[0054] the element

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Abstract

The invention discloses an alloy steel used for casting a track plate. The alloy steel comprises the following components in percent by weight: 0.3-0.37% of C, 0.75-1.05% of Mn, 0.30-0.65% of Si, 0-0.02% of S, 0-0.02% of P, 0.50-1.10% of Ni, 0.70-0.90% of Cr, 0.40-0.60% of Mo, 0.02-0.05% of Al, 0-0.02% of Cu, 0-0.01% of B and 95.21-97.03% of Fe. The invention also discloses a method for preparingthe track plate with the alloy steel, the prepared track plate and construction machinery. By using the alloy steel with alloy elements such as nickel, chromium, molybdenum and the like, the strengthand rigidity of the track plate can be increased. In addition, by performing quenching and tempering on the track plate as well as quenching on the wheeling surface, the overall strength and surface wear resistance can be further increased so that the pin can have enough strength to bear extrusion, extension and shock.

Description

technical field [0001] The invention relates to a crawler belt of a construction machine, in particular to an alloy steel for casting a track shoe, a track shoe and a manufacturing method thereof, and a construction machine including the track shoe. Background technique [0002] Construction machinery using crawlers has good mobility, so it can be flexibly applied to different workplaces. For example, crawler cranes are popular in petrochemical, nuclear power, wind power, thermal power, etc. due to their small grounding pressure, small turning radius, large climbing ability, good lifting performance, and high passability, mobility, and flexibility of the machine. Favored by the construction market. [0003] The track is composed of a plurality of track shoes connected to each other. Such as figure 1 with figure 2 As shown, the track shoe generally includes a base plate 1 , a box body 2 arranged on the bottom plate 1 and a plurality of pin lugs 3 arranged on both sides o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/54C21D9/00B62D55/18
Inventor 詹纯新刘权高一平何光辉谭微林新汪启明
Owner ZOOMLION HEAVY IND CO LTD
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