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Fully-prealloyed powder and preparation method thereof

A pre-alloying and powder technology, applied in the field of fully pre-alloyed powder and its preparation, can solve the problems of increased rejection rate, poor formability, limited use ratio, etc., and achieve good low-temperature sinterability, excellent weldability, and excellent resistance. abrasive effect

Active Publication Date: 2016-04-06
BOSUN TOOLS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation methods of pre-alloyed powder mainly include atomization method, chemical co-precipitation method and mechanical alloying method. The chemical co-precipitation method is a process of co-precipitation oxide reduction. The particle size of the powder is small and the loose ratio is low, which is beneficial to the knife The sintering of the head, but the total oxygen content is high, the process control is difficult, the price is high, and it pollutes the environment; the mechanical alloying method adopts the high-energy ball milling process, which can realize the alloying of some special elements, and the free energy of the powder It is relatively high, but the energy efficiency is low, and the subsequent passivation treatment is technically difficult; the atomization method adopts a smelting atomization process, which has large production capacity, low cost, high alloying degree of powder, and uniform composition, but high loose ratio and poor formability
[0006] Among the above three preparation methods, the atomization method is the most widely used in industrial applications. The pre-alloyed powder prepared by the water atomization method can improve the overall performance compared with the mixed powder with the same composition, but due to poor formability, the proportion of pre-alloyed powder exceeds When it is 50%, the waste rate of pressing increases significantly, and the proportion of use in the carcass is limited

Method used

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  • Fully-prealloyed powder and preparation method thereof
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  • Fully-prealloyed powder and preparation method thereof

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preparation example Construction

[0040] The invention also discloses a method for preparing the fully pre-alloyed powder, which includes the following process steps,

[0041] A. Separate a part of Cu from the raw material of the fully pre-alloyed powder as the cladding layer raw material, and the remaining part is the parent core raw material.

[0042] Specifically, the separated Cu as the raw material of the cladding layer accounts for 10-25% by weight of the fully pre-alloyed powder, and the Cu as the raw material of the cladding layer is added in the form of copper oxide.

[0043] B. Using the high-pressure water atomization pulverization method to prepare the matrix core core raw material in step A into matrix core core powder.

[0044]Specifically, the specific process and process conditions of the high-pressure water atomization powder making method are: batching is carried out according to the weight percentage of each component in the parent core raw material, preferably block, rod or sheet raw materi...

Embodiment 1

[0054] The composition and weight percentage of the fully pre-alloyed powder prepared in this embodiment are predetermined as: Fe62%, Cu20%, Sn4%, Ni8%, Co6%. That is, 100 kg of fully pre-alloyed powder is prepared in this embodiment, Fe accounts for 62 kg, Cu accounts for 20 kg, Sn accounts for 4 kg, Ni accounts for 8 kg, and Co accounts for 6 kg.

[0055] The preparation method of the fully pre-alloyed powder of this embodiment includes the following process steps,

[0056] A. Separate a part of Cu from the raw material of the fully pre-alloyed powder as the cladding layer raw material, and the remaining part is the parent core raw material.

[0057] In this embodiment, Cu used as the raw material of the cladding layer accounts for 15% by weight of the fully pre-alloyed powder. That is, in this embodiment, the cladding layer raw material contains 15 kg of Cu, and the parent core raw material is composed of 62 kg of Fe, 5 kg of Cu, 4 kg of Sn, 8 kg of Ni, and 6 kg of Co.

...

Embodiment 2

[0078] The composition and weight percentage of the fully pre-alloyed powder prepared in this embodiment are predetermined as: Fe38%, Cu40%, Sn10%, Ni8%, Co4%. That is, 100 kg of fully pre-alloyed powder is prepared in this embodiment, Fe accounts for 38 kg, Cu accounts for 40 kg, Sn accounts for 10 kg, Ni accounts for 8 kg, and Co accounts for 4 kg.

[0079] The preparation method of the fully pre-alloyed powder of this embodiment includes the following process steps,

[0080] A. Separate a part of Cu from the raw material of the fully pre-alloyed powder as the cladding layer raw material, and the remaining part is the parent core raw material.

[0081] In this embodiment, Cu used as the raw material of the cladding layer accounts for 25% by weight of the fully pre-alloyed powder. That is, in this embodiment, the cladding layer raw material contains 25 kg of Cu, and the parent core raw material is composed of 38 kg of Fe, 15 kg of Cu, 10 kg of Sn, 8 kg of Ni, and 4 kg of Co....

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Abstract

The invention discloses fully-prealloyed powder. The fully-prealloyed powder is prepared from, by weight percentage, 30%-65% of Fe, 15%-45% of Cu, 1%-15% of Sn, 0%-15% of Ni, 1%-30% of Co, 0%-5% of Qt and the balance inevitable impurities, wherein Qt is selected from one or more of Mn, Cr, Ti, P and W. The invention further discloses a preparation method of the fully-prealloyed powder. The formability and sintering strength of the fully-prealloyed powder are improved, and the sintering density of the fully-prealloyed power is increased; in the whole process, only the fully-prealloyed powder is used as a bonding agent in a diamond tool bit; and the advantages that the fully-prealloyed powder is low in sintering temperature, wide in process range and good in pullout strength on diamond are brought into full play.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a fully prealloyed powder and a preparation method thereof. Background technique [0002] The vast majority of diamond tools are made by powder metallurgy. First, the binder is mixed with artificial diamond particles, and then pressed and sintered. [0003] The binder (also known as the matrix) affects the performance of diamond tools to a large extent. It is generally formulated from various elements such as cobalt, copper, tin, iron, and nickel. After being evenly mixed with diamond particles, it is pressed , Sintering to achieve the set shape, density and mechanical properties, this multi-element mechanical mixed powder has high sintering temperature, insufficient alloying of elements, uneven metallographic structure, difficulty in achieving complete densification by sintering, and sintering when the melting point of elements is very different. Not easy to control a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/04C22C38/16C22C38/10C22C38/08C22C38/18C22C38/12C22C38/14C22C38/04B22F1/02B22F9/08B22F9/22
CPCC22C9/00C22C30/02C22C30/04C22C38/002C22C38/008C22C38/04C22C38/10C22C38/105C22C38/12C22C38/14C22C38/16C22C38/18B22F9/082B22F9/22B22F2009/0828B22F1/17
Inventor 李忠林王成军侯俊彦
Owner BOSUN TOOLS CO LTD
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