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Tool steel material for hedge trimmer blades and preparation method thereof

A tool steel and hedge trimmer technology, applied in the field of alloys, can solve the problems of blade becoming brittle, easy to break, element precipitation, etc., and achieve the effect of improving strength and uniform structure

Active Publication Date: 2015-05-20
NINGBO YINZHOU TAILI MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for blade tool steels, because of the requirement to use thinner materials, during the production process using powder metallurgy technology, the problem of element precipitation occurs due to relatively large temperature changes, resulting in the inside of the blade becoming brittle and easy to break

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Described preparation method is:

[0023] Calculate the amount of each composition for batching, and its composition is by weight percentage, 1.8% carbon, 0.35% silicon, 4.2% chromium, 8.2% tungsten, 4.2% vanadium, 3.5% molybdenum, 0.2% cobalt, 1.3% manganese, 0.12% titanium, 0.8% copper and aluminum, 0.5% boron, 0.003% rare earth containing niobium and yttrium, and the balance is iron. Among them, tungsten, vanadium, titanium, and rare earth are respectively made of tungsten Iron, vanadium ferro, titanium ferroalloy and rare earth ferroalloy are used for batching; the weight ratio of copper and aluminum is 2:1, the rare earth in rare earth ferroalloy accounts for 15% by weight, and the weight ratio of niobium and yttrium is 3:2;

[0024] Put carbon, silicon, iron, chromium, ferro-tungsten, ferro-vanadium, ferro-titanium, molybdenum, cobalt, and manganese into the furnace according to the calculated amount, heat and melt into a liquid, then add copper, aluminum and rare...

Embodiment 2

[0030] Described preparation method is:

[0031] Calculate the amount of each composition for batching, the composition is by weight percentage, 2.0% carbon, 0.5% silicon, 4.3% chromium, 8.3% tungsten, 4.5% vanadium, 3.8% molybdenum, 0.3% cobalt, 1.4% manganese, 0.15% titanium, 1.0% copper and aluminum, 0.6% boron, 0.004% rare earth containing niobium and yttrium, and the balance is iron. Among them, tungsten, vanadium, titanium, and rare earth are respectively made of tungsten Ferro-vanadium, ferro-titanium and rare earth ferroalloy ingredients;

[0032] Put carbon, silicon, iron, chromium, ferro-tungsten, ferro-vanadium, ferro-titanium, molybdenum, cobalt, and manganese into the furnace according to the calculated amount, heat and melt into a liquid, then add copper, aluminum and rare earth, the temperature is 1250-1350 ℃ for 2 hours;

[0033] Ensure that the temperature is 1000-1050 ℃ for constant temperature casting;

[0034] Cool down in stages at a constant rate. In t...

Embodiment 3

[0038] Calculate the amount of each composition for batching, and its composition is by weight percentage, 2.0% carbon, 0.45% silicon, 4.2% chromium, 8.2% tungsten, 4.25% vanadium, 3.6% molybdenum, 0.22% cobalt, 1.32% manganese, 0.12% titanium, 0.8% copper and aluminum, 0.53% boron, 0.003% rare earth containing niobium and yttrium, and the balance is iron. Among them, tungsten, vanadium, titanium, and rare earth are respectively made of tungsten Ferro-vanadium, ferro-titanium and rare earth ferroalloy ingredients;

[0039] Put carbon, silicon, iron, chromium, ferro-tungsten, ferro-vanadium, ferro-titanium, molybdenum, cobalt, and manganese into the furnace according to the calculated amount, heat and melt into a liquid, then add copper, aluminum and rare earth, the temperature is 1250-1350 ℃ for 2 hours;

[0040] Ensure that the temperature is 1000-1050 ℃ for constant temperature casting;

[0041] Cool down in stages at a constant rate. In the first stage, the temperature is...

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Abstract

The invention relates to a tool steel material for hedge trimmer blades and a preparation method thereof. The tool steel material for hedge trimmer blades comprises the following components in percentage by weight: 1.8-2.0% of carbon, 0.35-0.5% of silicon, 4.2-4.3% of chromium, 8.2-8.3% of tungsten, 4.2-4.5% of vanadium, 3.5-3.8% of molybdenum, 0.2-0.3% of cobalt, 1.3-1.4% of manganese, 0.12-0.15% of titanium, 0.8-1.0% of copper and aluminum, 0.5-0.6% of boron, 0.003-0.004% of rare earth containing niobium and yttrium, and the balance of iron. The technical scheme provided by the invention ensures that the vanadium, cobalt and molybdenum, which are beneficial to enhancing strength and have certain toughness, and the copper and aluminum for enhancing toughness can be better combined with the tungsten, chromium and titanium so as to reduce precipitation.

Description

technical field [0001] The invention belongs to the field of alloys, and refers to a tool steel, in particular to a tool steel material for a hedge trimmer blade and a preparation method thereof. Background technique [0002] In the actual use of the current hedge trimmer blades, the proportion of being discarded due to wear to a certain extent is not high, and the largest proportion is broken due to the brittleness of the blades. However, the purpose of tool steel is to use its high strength to realize its function, and increasing the toughness of alloy steel will affect the strength of alloy steel. In recent years, it has been found that adding some characteristic elements in alloy steel, such as tungsten and manganese In a certain proportion, alloy steel can improve toughness while ensuring strength. [0003] However, in the ordinary alloy steel melting and casting process, because of the different solubility of elements, especially during and after the casting process, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/36C22C33/04C21D1/28C21D1/18
Inventor 郑臻
Owner NINGBO YINZHOU TAILI MACHINERY
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