阅读说明：本技术 高耐磨挖掘机斗齿及其铸造方法 (High-wear-resistance excavator bucket tooth and casting method thereof ) 是由 刘波 刘宸伟 马贵兰 于 2019-09-21 设计创作，主要内容包括：本发明公开了高耐磨挖掘机斗齿及其铸造方法,属于金属材料技术领域,所述挖掘机斗齿中各元素成分的质量百分比为：碳0.24-0.27％,硅0.6-1.0％,锰0.9-1.2％,铬1.0-1.5％,钨0.1-0.2％,余量为铁及不可避免的杂质。本发明的挖掘机斗齿在铸造过程中添加了细化晶粒的钨元素,提高了高耐磨挖掘机斗齿机械性能,尤其是提高了硬度及冲击韧度值,使斗齿的耐磨性好,使用寿命长。(The invention discloses a high-wear-resistance excavator bucket tooth and a casting method thereof, belonging to the technical field of metal materials, wherein the excavator bucket tooth comprises the following element components in percentage by mass: 0.24 to 0.27 percent of carbon, 0.6 to 1.0 percent of silicon, 0.9 to 1.2 percent of manganese, 1.0 to 1.5 percent of chromium, 0.1 to 0.2 percent of tungsten, and the balance of iron and inevitable impurities. According to the excavator bucket tooth, the tungsten element for refining the crystal grains is added in the casting process, so that the mechanical property of the high-wear-resistance excavator bucket tooth is improved, particularly the hardness and impact toughness values are improved, the wear resistance of the bucket tooth is good, and the service life of the bucket tooth is long.)

1. The high-wear-resistance excavator bucket tooth is characterized in that the excavator bucket tooth comprises the following element components in percentage by mass: 0.24 to 0.27 percent of carbon, 0.6 to 1.0 percent of silicon, 0.9 to 1.2 percent of manganese, 1.0 to 1.5 percent of chromium, 0.1 to 0.2 percent of tungsten, and the balance of iron and inevitable impurities.

2. The highly wear-resistant excavator tooth as claimed in claim 1, wherein the excavator tooth comprises the following element components in percentage by mass: 0.24% of carbon, 0.6% of silicon, 0.9% of manganese, 1.0% of chromium, 0.1% of tungsten, and the balance of iron and inevitable impurities.

3. The highly wear-resistant excavator tooth as claimed in claim 1, wherein the excavator tooth comprises the following element components in percentage by mass: 0.25% of carbon, 1.8% of silicon, 1.0% of manganese, 1.3% of chromium, 0.15% of tungsten and the balance of iron and inevitable impurities.

4. The highly wear-resistant excavator tooth as claimed in claim 1, wherein the excavator tooth comprises the following element components in percentage by mass: 0.27% of carbon, 1.0% of silicon, 1.2% of manganese, 1.5% of chromium, 0.2% of tungsten, and the balance of iron and inevitable impurities.

5. The casting method of the bucket tooth of the high-wear-resistance excavator according to any one of claims 1 to 4, comprising a casting process and a heat treatment process, wherein in the heat treatment process, the quenching temperature is 900 ℃ to 950 ℃, the heat preservation time after quenching is 2 to 4 hours, the tempering temperature is 230 ℃ to 260 ℃, and the heat preservation time after tempering is 3 to 4 hours.

6. The method of casting a tooth for a high abrasion excavator according to claim 5, wherein the tempering temperature in the heat treatment step is 240 ℃.

Technical Field

The invention belongs to the technical field of metal materials, relates to an excavator bucket tooth, and particularly relates to a high-wear-resistance excavator bucket tooth and a casting method thereof.

Background

The bucket tooth belongs to an excavator spare and accessory part, is generally arranged at the front end of an excavator bucket, is widely applied to industries such as mines, metallurgy, electric power, building materials, cement, machinery and the like, is directly contacted with sand, soil, rocks, minerals and the like, and bears the impact action and the bending action when contacting materials. In the working process, the tip of the bucket tooth is abraded by larger impact sliding abrasive particles, and various furrows and deformation are frequently generated on the surface of the tip, so that the surface abrasion is caused. Factors that affect the life of the excavator tooth are many, except for the ore structure. The hardness degree, the blasting condition, the maintenance and the operating level of a driver of the excavator by using units, the structure and the shape of the bucket tooth, the material of the bucket tooth of the excavator and the heat treatment in the preparation method thereof.

The ideal excavator bucket tooth material surface should have high hardness, high wear resistance, and the base member should have better mechanical properties, high toughness to characteristics such as long service life are prolonged, this is the requirement that single material is difficult to reach simultaneously. The bucket teeth in the prior art are generally made of wear-resistant steel, for example, Hadfield steel invented by Robert Hadfield, and have better wear resistance and toughness, but the impact toughness of the bucket teeth is lower, so that the surfaces of the bucket teeth are easy to cause large blocks to fall off and even easily break in the working process of an excavator. In addition, high manganese steels are generally considered to have surfaces that are effective in producing work hardened layers exhibiting high wear resistance only under high impact or strongly gouging wear conditions, which are otherwise not even comparable to that of ordinary steels. And the manganese content is higher, so the cost is higher and the energy consumption is higher.

Disclosure of Invention

Aiming at the technical defects, the invention aims to provide a high-wear-resistance excavator bucket tooth with strong wear resistance and long service life.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a high-wear-resistance excavator bucket tooth, which comprises the following element components in percentage by mass: 0.24 to 0.27 percent of carbon, 0.6 to 1.0 percent of silicon, 0.9 to 1.2 percent of manganese, 1.0 to 1.5 percent of chromium, 0.1 to 0.2 percent of tungsten, and the balance of iron and inevitable impurities.

Preferably, the mass percentages of the element components in the excavator bucket tooth are as follows: 0.24% of carbon, 0.6% of silicon, 0.9% of manganese, 1.0% of chromium, 0.1% of tungsten, and the balance of iron and inevitable impurities.

Preferably, the mass percentages of the element components in the excavator bucket tooth are as follows: 0.25% of carbon, 1.8% of silicon, 1.0% of manganese, 1.3% of chromium, 0.15% of tungsten and the balance of iron and inevitable impurities.

Preferably, the mass percentages of the element components in the excavator bucket tooth are as follows: 0.27% of carbon, 1.0% of silicon, 1.2% of manganese, 1.5% of chromium, 0.2% of tungsten, and the balance of iron and inevitable impurities.

The casting method of the bucket tooth of the high-wear-resistance excavator comprises a casting process and a heat treatment process, wherein in the heat treatment process, the quenching temperature is 900-950 ℃, the heat preservation time after quenching is 2-4h, the tempering temperature is 230-260 ℃, and the heat preservation time after tempering is 3-4 h.

Preferably, in the heat treatment process, the tempering temperature is 240 ℃.

The invention has the beneficial effects that: according to the excavator bucket tooth, the tungsten element for refining the crystal grains is added in the casting process, so that the mechanical property of the high-wear-resistance excavator bucket tooth is improved, particularly the hardness and impact toughness values are improved, the wear resistance of the bucket tooth is good, and the service life of the bucket tooth is long.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The bucket tooth of the high-wear-resistance excavator comprises the following element components in percentage by mass: 0.24% of carbon, 0.6% of silicon, 0.9% of manganese, 1.0% of chromium, 0.1% of tungsten, and the balance of iron and inevitable impurities.

The casting method of the bucket tooth of the high-wear-resistance excavator comprises a casting process and a heat treatment process, wherein in the heat treatment process, the quenching temperature is 900 ℃, the heat preservation time after quenching is 2 hours, the tempering temperature is 230 ℃, and the heat preservation time after tempering is 3 hours.

Example 2

The bucket tooth of the high-wear-resistance excavator comprises the following element components in percentage by mass: 0.25% of carbon, 1.8% of silicon, 1.0% of manganese, 1.3% of chromium, 0.15% of tungsten and the balance of iron and inevitable impurities.

The casting method of the bucket tooth of the high-wear-resistance excavator comprises a casting process and a heat treatment process, wherein in the heat treatment process, the quenching temperature is 930 ℃, the heat preservation time after quenching is 3 hours, the tempering temperature is 240 ℃, and the heat preservation time after tempering is 3 hours.

Example 3

The bucket tooth of the high-wear-resistance excavator comprises the following element components in percentage by mass: 0.27% of carbon, 1.0% of silicon, 1.2% of manganese, 1.5% of chromium, 0.2% of tungsten, and the balance of iron and inevitable impurities.

The casting method of the bucket tooth of the high-wear-resistance excavator comprises a casting process and a heat treatment process, wherein in the heat treatment process, the quenching temperature is 950 ℃, the heat preservation time after quenching is 4 hours, the tempering temperature is 260 ℃, and the heat preservation time after tempering is 4 hours.

And (3) performance testing:

the high abrasion excavator bucket teeth obtained in examples 1 to 3 were subjected to performance tests, and the test results are shown in table 1:

table 1: performance test result of high-abrasion-resistance excavator bucket tooth

In conclusion, the high wear-resistant excavator bucket tooth of the invention has good mechanical properties, and particularly, the high wear-resistant excavator bucket tooth of the embodiment 2 has higher hardness and impact toughness values and the best wear resistance.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.