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Relieved tooth and preparation method thereof

A shovel tooth, mass percentage technology, applied in the field of loader shovel teeth and its preparation, can solve the problems of high cost of raw materials and heat treatment, complicated melting process, and unsatisfactory material wear resistance, etc., and achieve good mechanical properties, high resistance The effect of tensile strength

Inactive Publication Date: 2013-06-12
NINGBO JIADA PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing wear-resistant steel for shovel teeth, such as ZGMn 13 The material, whose hardness after solid solution treatment is HB170-210, has good strong impact resistance, but its wear resistance mainly comes from the surface layer hardening caused by impacting ore, and the wear resistance of the material itself is not ideal. The cost of heat treatment is relatively high, and the melting process is complicated

Method used

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  • Relieved tooth and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The composition and mass percentage of the shovel teeth in this embodiment are: C: 0.29%, Mn: 0.90%, Si: 0.8%, Cr: 1.40%, B: 0.001%, Al: 0.02%, and the balance is Fe. At the same time, due to the adverse effects of S and P elements on the mechanical properties of the shovel teeth, it is necessary to ensure that the mass percentage of the S element is less than or equal to 0.025%, and the mass percentage of the P element is less than or equal to 0.025%.

[0013] As the basic element of alloy steel, C element forms carbides with Fe and Mn, which improves the hardness and wear resistance of steel, and plays an important role in solid solution strengthening.

[0014] Although Mn element is an element that promotes the formation of austenite in alloy steel, the content of Mn element is usually higher, above 10%. However, under the premise of ensuring the austenite structure, with the decrease of the content of Mn element, although the stability of austenite decreases, the pr...

Embodiment 2

[0027] The composition and mass percentage of the shovel teeth in this embodiment are: C: 0.31%, Mn: 1.2%, Si: 1.0%, Cr: 1.50%, B: 0.003%, Al: 0.03%, and the balance is Fe. At the same time, due to the adverse effects of S and P elements on the mechanical properties of shovel teeth, it is necessary to ensure that the mass percentage of S element is less than or equal to 0.025%, and the mass percentage of P element is less than or equal to 0.025%.

[0028] In this embodiment, the shovel teeth go through a casting process and a heat treatment process. The heat treatment process adopts the same process conditions as in Example 1, that is, quenching after heating up to 900 ° C and tempering at 220 ° C to 250 ° C after holding for 2-4 hours Temper at low temperature, and keep warm for 2-4 hours after tempering. Test its mechanical properties as shown in Table 2:

[0029] Table 2

[0030]

[0031] After adopting the ratio of this embodiment, the mechanical properties of the sho...

Embodiment 3

[0033] The composition and mass percentage of the shovel teeth in this embodiment are: C: 0.33%, Mn: 1.40%, Si: 1.20%, Cr: 1.70%, B: 0.005%, Al: 0.06%, and the balance is Fe. At the same time, due to the adverse effects of S and P elements on the mechanical properties of shovel teeth, it is necessary to ensure that the mass percentage of S element is less than or equal to 0.025%, and the mass percentage of P element is less than or equal to 0.025%.

[0034] In this embodiment, the shovel teeth go through a casting process and a heat treatment process. The heat treatment process adopts the same process conditions as in Example 1, that is, quenching after heating up to 900 ° C and tempering at 220 ° C to 250 ° C after holding for 2-4 hours Temper at low temperature, and keep warm for 2-4 hours after tempering. Test its mechanical properties as shown in Table 3:

[0035] table 3

[0036]

[0037] After adopting the ratio of this embodiment, the mechanical properties of the s...

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Abstract

The invention discloses a relieved tooth and a preparation method thereof, and the relieved tooth and the preparation method disclosed by the invention can be used for solving the problems of poor abrasion resistance and impact property of an existing relieved tooth. The relieved tooth disclosed by the invention comprises the following compositions in percentage by weight: 0.29%-0.33% of C, 0.90%-1.40% of Mn, 0.8%-1.20% of Si, 1.40%-1.70% of Cr, 0.001%-0.005% of B, 0.02%-0.06% of Al and the balance of Fe. The invention provides the preparation method for preparing the relieved tooth, and the preparation method comprises a casting process and a thermal treatment process. The relieved tooth disclosed by the invention is good in mechanical property, high in hardness, high in tensile strengthand high in tenacity and can meet the special working environment requirements of a loader.

Description

technical field [0001] The invention relates to a shovel tooth and a preparation method thereof, in particular to a shovel tooth for a loader and a preparation method thereof. Background technique [0002] Loader shovel teeth are important parts on the loader, similar to human teeth, and are also vulnerable parts. The shovel teeth of the loader directly work with the ore, and are subjected to strong abrasive wear, and the force is complex and periodically changed. At the same time, the shovel teeth of the loader are also accompanied by high stress when working with the ore, and their service conditions are very harsh. Therefore, the shovel teeth High wear resistance requirements, but also requires good comprehensive mechanical properties. [0003] Existing wear-resistant steel for shovel teeth, such as ZGMn 13 The material has a hardness of HB170-210 after solid solution treatment, and has good strong impact resistance, but its wear resistance mainly comes from the hardeni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/32C21D1/18E02F9/28
Inventor 钱嘉镕新
Owner NINGBO JIADA PRECISION CASTING
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