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Internal hexagonal wrench

A hexagonal wrench and preparation technology, which is applied in the field of powder metallurgy inner hexagonal wrench and hexagonal wrench, can solve the problem of alloy steel tensile strength, yield strength, corrosion resistance, product performance such as lack of strength and hardness, Problems such as numerous processes, to achieve the effect of increasing the scope of use, improving corrosion resistance, and reducing costs

Inactive Publication Date: 2018-03-13
NINGBO YINZHOU YONGJIA ELECTRICAL TOOLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional processing method not only has many procedures, but also lacks in product performance such as strength and hardness.
[0005] Aiming at the shortcomings of traditional alloy steel such as low hardness and non-wear resistance, Publication No. 106244936A discloses a method to improve the strength, hardness and wear resistance of the product by increasing the content of carbon, chromium and molybdenum in the alloy ball.
However, simply increasing the content of some elements in the alloy cannot solve the tensile strength, yield strength, corrosion resistance and reduce the impurity elements in the steel.

Method used

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  • Internal hexagonal wrench

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Milling: Weigh raw materials according to the composition and mass percentage of the above wrench, including Pd: 1.6%, Ag: 4%, C: 0.05%, Si: 0.6%, Cu: 0.3%, Ni: 2%, Li: 0.8 %, the balance is Fe and impurities, wherein impurities include P<0.05%, S<0.04%, N<0.02%, O<0.02%. Various raw materials were jet milled into powders with a particle size of 10 μm and mixed.

[0037] Pre-alloying: the mixed powder is pressed to a density of 1.9g / cm 3 Put the compact into a vacuum furnace, adjust the pressure in the furnace to 0.005Pa, slowly raise the temperature to 630°C at a rate of 30°C / min, and keep it warm for 5h to obtain a prefabricated compact.

[0038] Forming: The prefabricated block is broken by machinery, and the fragments are jet-milled into powder, and then the powder is filled into the copper tube in the explosive device, and the explosive is filled according to the powder quality. The explosive is an ordinary solid mixed explosive. The alloy blank is formed by expl...

Embodiment 2

[0042]Milling: Weigh raw materials according to the composition and mass percentage of the above wrench, including Pd: 0.2%, Ag: 1%, C: 0.01%, Si: 0.4%, Cu: 0.1%, Ni: 1%, Li: 0.5% %, the balance is Fe and impurities, wherein impurities include P<0.05%, S<0.04%, N<0.02%, O<0.02%. Various raw materials were jet milled into powders with a particle size of 5 μm and mixed.

[0043] Pre-alloying: the mixed powder is pressed to a density of 1.9g / cm 3 Put the compact into a vacuum furnace, adjust the pressure in the furnace to 0.005Pa, slowly raise the temperature to 630°C at a rate of 30°C / min, and keep it warm for 5h to obtain a prefabricated compact.

[0044] Forming: The prefabricated block is broken by machinery, and the fragments are jet-milled into powder, and then the powder is filled into the copper tube in the explosive device, and the explosive is filled according to the powder quality. The explosive is an ordinary solid mixed explosive. The alloy blank is formed by explo...

Embodiment 3

[0048] Milling: Weigh raw materials according to the composition and mass percentage of the above wrench, including Pd: 3%, Ag: 6%, C: 0.1%, Si: 0.8%, Cu: 0.5%, Ni: 3%, Li: 1 %, the balance is Fe and impurities, wherein impurities include P<0.05%, S<0.04%, N<0.02%, O<0.02%. Various raw materials were jet milled into powders with a particle size of 15 μm and mixed.

[0049] Pre-alloying: the mixed powder is pressed to a density of 1.9g / cm 3 Put the compact into a vacuum furnace, adjust the pressure in the furnace to 0.005Pa, slowly raise the temperature to 630°C at a rate of 30°C / min, and keep it warm for 5h to obtain a prefabricated compact.

[0050] Forming: The prefabricated block is broken by machinery, and the fragments are jet-milled into powder, and then the powder is filled into the copper tube in the explosive device, and the explosive is filled according to the powder quality. The explosive is an ordinary solid mixed explosive. The alloy blank is formed by explosive...

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Abstract

The invention discloses an internal hexagonal wrench and a preparation method of the internal hexagonal wrench, and belongs to the technical field of powder metallurgy. The internal hexagonal wrench is prepared from 0.2-3% of Pd, 1-6% of Ag, 0.01-0.1% of C, 0.4-0.8% of Si, 0.1-0.5% of Cu, 1-3% of Ni, 0.5-1% of Li and the balance Fe and impurities. Degassing agent lithium is added in raw materials,lithium will react with nitrogen, oxygen, sulphur, nitrogen and other gas elements in alloy to generate a compound with the low density and melting point, and mechanical performance of alloy is improved. The Pd element can refine grains during prealloying, meanwhile, sulfuration of Ag is restrained, corrosion resistance of alloy is improved, mechanical performance is improved, and alloy color andluster are improved. Meanwhile, the instantaneous compaction technology is utilized for obtaining good combination between powder, and the compacted blank density reaches the high level.

Description

technical field [0001] The invention relates to an inner hexagonal wrench, in particular to a powder metallurgy inner hexagonal wrench, belonging to the technical field of powder metallurgy. Background technique [0002] Powder metallurgy is a process technology for producing metal powder or using metal powder (or a mixture of metal powder and non-metal powder) as raw material, forming and sintering to manufacture metal materials, composite materials and various types of products. Powder metallurgy includes powder making and products. Among them, milling is mainly a metallurgical process, which is consistent with the literal meaning. However, powder metallurgy products often go far beyond the scope of materials and metallurgy, and are often interdisciplinary technologies. In particular, modern metal powder 3D printing integrates mechanical engineering, CAD, reverse engineering technology, layered manufacturing technology, numerical control technology, material science, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/16C22C38/08C22C33/02B22F9/04B22F3/08B22F3/10
CPCC22C38/002B22F3/08B22F3/10B22F9/04B22F2009/045C22C33/0264C22C38/007C22C38/02C22C38/08C22C38/16
Inventor 侯红光周志礼金晓群
Owner NINGBO YINZHOU YONGJIA ELECTRICAL TOOLS