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Microalloyed iron-based composite powder for diamond products and preparation method thereof

A technology of composite powder and pre-alloyed powder, which is applied in metal processing equipment, transportation and packaging, etc., and can solve problems such as environmental pollution, sharpness reduction, and complicated preparation process

Active Publication Date: 2021-09-07
HENAN HOLD DIAMOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, an engineering problem currently faced by the diamond product industry is that no matter what kind of iron-based powder is used, there is a prominent problem: the sintering temperature is high, and the structure of the matrix after high-temperature sintering is coarse and agglomerated. Due to high hardness and strong wear resistance, the exposed height of diamond is limited, which greatly limits the sharpness of diamond tools. In other words, the sharpness of iron-based bond diamond tools is poor, which is a common problem faced by the industry.
However, the high Mn alloy steel powder prepared by this method has problems such as complex preparation process, easy environmental pollution caused by pickling, and high high-temperature reduction cost. Carcass wear resistance is too high and the sharpness is reduced

Method used

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  • Microalloyed iron-based composite powder for diamond products and preparation method thereof
  • Microalloyed iron-based composite powder for diamond products and preparation method thereof
  • Microalloyed iron-based composite powder for diamond products and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] The preparation of embodiment 1 Fe-based pre-alloyed powder (1)

[0028] A medium frequency induction smelting furnace with a capacity of 250kg is used, and the composition ratio is 98.8% Fe, 0.3% Si, 0.6% Mn, 0.3% rare earth, and a furnace charge with a total weight of 200kg is prepared. The weight of raw materials is as shown in Table 1:

[0029] Table 1 Embodiment 1 Raw materials and feeding weight ratio

[0030] raw material Fe block Si block Mn block rare earth block gross weight Weight (kg) 197.6 0.6 1.2 0.6 200

[0031] Add Fe, Si, Mn, and rare earth to the medium-frequency induction furnace in turn, energize to melt and refine, add 0.2% carbon powder of the total weight of the smelt to deoxidize, adjust the superheat of the melt to 150-200°C, and pour it into the tundish , After the melt passes through the leakage hole at the bottom of the bag, it is crushed by high-pressure water, and atomized into powder in the atomizing barr...

Embodiment 2

[0034] The preparation of embodiment 2Fe base pre-alloyed powder (2)

[0035] A medium-frequency induction smelting furnace with a capacity of 250kg is used, and the composition ratio is 99.75% Fe, 0.1% Si, 0.1% Mn, and 0.05% rare earth. The total amount of feed is 200kg, and the ratio of raw materials and weight is shown in Table 3 below:

[0036] Table 3 Embodiment 2 raw materials and weight proportion

[0037] raw material Fe block Si block Mn block rare earth block gross weight Weight (kg) 199.5 0.2 0.2 0.1 200

[0038] Add Fe, Si, Mn, and rare earth to the medium-frequency induction furnace in turn, energize to melt and refine, add 0.2% carbon powder of the total weight of the smelt to deoxidize, adjust the superheat of the melt to 150-200°C, and pour it into the tundish , After the melt passes through the leakage hole at the bottom of the bag, it is crushed by high-pressure water, and atomized into powder in the atomizing barrel filled...

Embodiment 3

[0041] The preparation of embodiment 3 Fe-based pre-alloyed powder (3)

[0042] Use a 250kg intermediate frequency induction smelting furnace, the composition ratio is 99.4% Fe, 0.2% Si, 0.3% Mn, 0.1% rare earth, and the total weight of the feed is 200 kg. The raw materials and feed weight are shown in Table 5:

[0043] Table 5 Embodiment 3 raw materials and weight ratio

[0044] raw material Fe block Si block Mn block rare earth block gross weight Weight (kg) 198.8 0.4 0.6 0.2 200

[0045] Add Fe, Si, Mn, and rare earth to the medium-frequency induction furnace in turn, energize to melt and refine, add 0.2% carbon powder of the total weight of the smelt to deoxidize, adjust the superheat of the melt to 150-200°C, and pour it into the tundish , After the melt passes through the leakage hole at the bottom of the bag, it is crushed by high-pressure water, and atomized into powder in the atomizing barrel filled with nitrogen protection. The pow...

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Abstract

The microalloy iron-based composite powder for diamond products and the preparation method thereof of the present invention belong to the technical field of metal material powder metallurgy. The components of the microalloyed iron-based composite powder include Fe-based pre-alloyed powder and ultra-fine additive powder; Fe-based pre-alloyed powder is doped with Si, Mn, La+Ce mixed rare earth; the ultra-fine additive powder is Cr 3 C 2 or / and Mo 2 C; superfine additive powder by weight: Fe-based pre-alloyed powder = 0.3-5: 95-99.7. The Fe-based pre-alloyed powder is prepared by high-temperature liquid melting and high-pressure water atomization, and then evenly mixed with ultra-fine additive powder. The method of the present invention can effectively prevent the coarsening and growth of powder particles by sintering, improve the comprehensive mechanical properties of the powder sintered body, and improve the sharpness of diamond tools; Requirements.

Description

technical field [0001] The invention belongs to the technical field of metal material powder metallurgy, and in particular relates to the composition design, water atomization preparation method and ultrafine Cr 3 C 2 、Mo 2 Functional combined application between C powders. Background technique [0002] Diamond products are widely used in many application fields such as aerospace, mechanical processing, and construction. Among them, the consumption of metal bond products accounts for about 85% of the total product consumption. Metal binders are mainly classified into iron-based, copper-based and cobalt-based according to their composition categories. Among them, cobalt-based binders have the best overall performance, but are also the most expensive. Due to its low price, iron-based binders can greatly reduce the development and production costs of diamond products, and have always been the development focus of the diamond product industry at home and abroad. At present, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/08C22C38/02C22C38/04C22C38/12C22C38/22
CPCB22F9/082C22C38/02C22C38/04C22C38/005C22C38/22C22C38/12B22F2009/0828B22F2009/0848B22F1/052
Inventor 董书山李鹏旭徐航董欣然陶强朱品文
Owner HENAN HOLD DIAMOND TECH
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