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Alloy steel for bucket teeth and preparation method of bucket teeth

A technology of alloy steel and bucket teeth, applied in the field of preparation of alloy steel and bucket teeth, can solve the problems of high cost of bucket teeth material, short service life, poor impact toughness, etc., achieve uniform distribution of carbides, eliminate segregation and columnar crystals granules, the effect of improving performance

Active Publication Date: 2015-05-27
柳州市友军机械配件铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a preparation method of alloy steel for bucket teeth and bucket teeth, which can solve the problems of high cost of bucket teeth materials for engineering machinery, poor impact toughness, easy fracture, and short service life.

Method used

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  • Alloy steel for bucket teeth and preparation method of bucket teeth

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare bucket teeth as follows:

[0027] First, smelting and casting:

[0028] 1) In the pre-deoxidation stage of alloy steel raw material smelting, ferromanganese and ferrosilicon are used for pre-deoxidation, and at the same time, 0.10% Ca-Si alloy deoxidizer is added. In the final deoxidation stage, 0.15%-0.20% pure aluminum is added for deoxidation to control molten steel The content of oxygen in the medium is (17-26)×10 -6 Within the interval; Sampling and analysis of the chemical composition of molten steel, adjusted according to the weight percentage of the substance to obtain molten steel with C: 0.25%, Si: 0.78%, Mn: 0.90%, Cr: 1.0%, p≤0.030, S≤0.030;

[0029] 2) Add nano-sized TiN, the addition amount is 0.30% of the molten steel weight, place it at the bottom of the casting ladle, and use the impact force of the molten steel during tapping to fully stir; Get tooth castings.

[0030] Second, the heat treatment process of bucket tooth castings:

[0031] 1)...

Embodiment 2

[0035] Prepare bucket teeth as follows:

[0036] First, smelting and casting:

[0037] 1) In the pre-deoxidation stage of alloy steel raw material smelting, ferromanganese and ferrosilicon are used for pre-deoxidation, at the same time, 0.10% Ca-Si alloy is added, and 0.15%-0.20% pure aluminum is added for deoxidation during final deoxidation, so as to control the oxygen content in molten steel Content in (17-26)×10 -6 Within the interval; Sampling and analysis of the chemical composition of molten steel, adjusted according to the weight percentage of the substance to obtain molten steel with C: 0.31%, Si: 0.48%, Mn: 1.15%, Cr: 0.85%, p≤0.030, S≤0.030;

[0038] 2) Add nano-sized TiN, the addition amount is 0.28% of the molten steel weight, place it at the bottom of the casting ladle, and use the impact force of the molten steel when tapping to fully stir; Get tooth castings.

[0039] Second, the heat treatment process of the bucket tooth casting: the method is the same as t...

Embodiment 3

[0041] Prepare bucket teeth as follows:

[0042] First, smelting and casting:

[0043] 1) In the pre-deoxidation stage of alloy steel raw material smelting, ferromanganese and ferrosilicon are used for pre-deoxidation, at the same time, 0.10% Ca-Si alloy is added, and 0.15%-0.20% pure aluminum is added for deoxidation during final deoxidation, so as to control the oxygen content in molten steel Content in (17-26)×10 -6 Within the interval; Sampling and analysis of the chemical composition of molten steel, adjusted according to the weight percentage of the substance to obtain molten steel with C: 0.28%, Si: 0.60%, Mn: 1.20%, Cr: 1.10%, S≤0.030, P≤0.030;

[0044]2) Add nano-sized TiN, the addition amount is 0.34% of the molten steel weight, place it at the bottom of the casting ladle, and use the impact force of the molten steel during tapping to fully stir; Get tooth castings.

[0045] Second, the heat treatment process of the bucket tooth casting: the method is the same as ...

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Abstract

The invention discloses alloy steel for bucket teeth and a preparation method of the bucket teeth, and relates to the field of mechanical manufacturing. The alloy steel for the bucket teeth comprises the chemical components in percentage by weight: 0.25-0.33 percent of C, 0.30-0.80 percent of Si, 0.85-1.25 percent of Mn, 0.70-1.10 percent of Cr, 0.20-0.35 percent of nanoscale TiN, less than or equal to 0.030 percent of p and less than or equal to 0.030 percent of S. The method comprises the following steps: smelting and casting the materials to obtain castings; and performing heat treatment to obtain the bucket teeth. When the alloy steel is smelted, Ca-Si alloys are added while preliminary deoxidizing is carried out by using ferromanganese and silicon iron at the same time, the nanoscale TiN is added during modification treatment; the bucket teeth castings are subjected to high-temperature solid solution spheroidizing annealing. According to the alloy steel and the preparation method, the problems of high material cost of the bucket teeth, poor impact toughness, easiness for breakage and short service life are solved.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, in particular to an alloy steel used for manufacturing bucket teeth and a preparation method of the bucket teeth. Background technique [0002] Commonly used bucket teeth are made of low alloy material, the composition is: C: 0.25%-0.35%, Si: 0.30%-0.80%, Mn: 0.80%-1.50%, S≤0.03%, p≤0.03%, Cr: 0.50% -1.0%, Ni: 0.40%-0.90%, Mo: 0.25%-0.60%, containing relatively high Mo, Ni and other precious metals, the product cost is high; the casting process is sodium silicate precision casting; smelting by intermediate frequency furnace melting method ; The normal deoxidation process adds 0.06%-0.10% pure aluminum for final deoxidation, the pouring temperature is 1520°C-1580°C, and there is no microalloying and modification of molten steel. The heat treatment process is normalizing + quenching + tempering or quenching + tempering, normalizing temperature: 860°C-910°C, quenching temperature: ...

Claims

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Application Information

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IPC IPC(8): C22C38/18C22C33/04C21D1/32C21D1/18E02F9/28
Inventor 龙吉祥
Owner 柳州市友军机械配件铸造有限公司
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