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Binder and preparation method for preparing powder metallurgy premixed steel powder by adopting binder

A technology of binder preparation and powder metallurgy, which is applied in the field of materials, can solve the problems of polluting the working environment, composition, structure performance and size unevenness, and achieve the effect of improving performance and bonding rate

Pending Publication Date: 2020-11-03
JIANGDU LEADER POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to improve the mechanical properties of Fe-based products, alloying elements such as C, Ni, Cu, and Mo are often added to Fe powder. Compared with Fe powder, these alloy elements have different bulk density, particle size, and morphology. Cause dust and segregation of alloying elements in the mixed powder during transportation and pressing, pollute the working environment, and lead to uneven composition, structure, and even performance and size in the blank and between blanks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] A binder used in the preparation of powder metallurgy premixed steel powder, the binder is hydroxyl-terminated polybutadiene.

[0016] Further, the selected hydroxyl-terminated polybutadiene has a molecular weight of 1000-4500.

[0017] Further, follow the steps below:

[0018] 1) Dissolve HTPB in ethyl acetate solvent, or tetrahydrofuran, dichloromethane solvent, add the base powder and auxiliary materials prepared in advance according to the ingredient list into the double-cone rotary vacuum mixer, and the base powder is iron powder , the auxiliary materials are copper powder, graphite and zinc stearate;

[0019] 2) Start premixing after the feeding is finished, the time is 15-25min, the speed is 8-15r min －１ , during which the prepared solvent is added to the dissolution tank for dissolution;

[0020] 3) On the premise of confirming that the binder is completely dissolved, turn on the metering diaphragm pump to spray liquid, during which the mixer keeps rotating a...

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PUM

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Abstract

The invention relates to a binder and a preparation method for preparing powder metallurgy premixed steel powder by adopting the binder. The binder is hydroxyl-terminated polybutadiene. By the adoption of the technical scheme, through detection, the bonding rate of copper powder and carbon powder is remarkably increased, and the performance of the premixed steel powder is effectively improved.

Description

technical field [0001] The invention relates to a binder and a preparation method of using the binder to prepare powder metallurgy premixed steel powder, belonging to the technical field of materials. Background technique [0002] In order to improve the mechanical properties of Fe-based products, alloying elements such as C, Ni, Cu, and Mo are often added to Fe powder. Compared with Fe powder, these alloy elements have different bulk density, particle size, and morphology. As a result, dust and segregation of alloying elements will be generated during transportation and pressing of the mixed powder, polluting the working environment, and causing uneven composition, structure, and even performance and size in the blank and between blanks. Pre-alloyed steel powder is a new technology to solve this problem by bonding alloying elements in steel powder. The preparation principle is based on highly compressible Fe powder, diffusion powder or pre-alloyed powder. The binder adhere...

Claims

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Application Information

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IPC IPC(8): B22F1/00
CPCB22F1/10
Inventor 葛莲李松林
Owner JIANGDU LEADER POWDER METALLURGY