Mixed powder electric spark surface strengthening medium powder
A technology of surface strengthening and electric sparking, which is applied in metal material coating process, coating, etc., can solve the problem that the processing efficiency and processing quality cannot meet expectations, the performance of the strengthening layer is single, and it is difficult to meet various strengthening parameters. requirements and other issues
Inactive Publication Date: 2019-02-15
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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Problems solved by technology
There is still a big gap between domestic powder and foreign countries in many aspects such as particle size, powder ratio, and purity rate, resulting in processing efficiency and processing quality that cannot meet expectations
At present, mixed powder EDM for scientific research mainly uses a single powder, such as C powder, Al powder, Si powder, etc., the performance of the strengthening layer and the type of strengthening phase are single, and it is difficult to meet the requirements for various strengthening parameters.
The actual production process is mainly based on powder imported from abroad, the production cost is high, there are many additives in the powder, and the production process is complicated
Method used
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Experimental program
Comparison scheme
Effect test
specific Embodiment approach 2
[0006] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mixed powder is composed of three pure powders, and the mixing ratio is 1 / 3 of each powder mass, and other steps and parameters are the same as Embodiment 1.
specific Embodiment approach 1
[0007] Embodiment 1: The difference between this embodiment and Embodiment 1 is that the mixed powder is composed of four pure powders, and the mixing ratio is 25% of each powder mass. Other steps and parameters are the same as Embodiment 1.
[0008] Embodiment 1: The difference between this embodiment and Embodiment 1 is that the mixed powder is composed of five pure powders, and the mixing ratio is 20% of the mass of each powder. Other steps and parameters are the same as Embodiment 1.
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Abstract
The invention discloses strengthening powder suitable for mixed powder electrosparking. The problems that in an existing electric spark surface strengthening process, adopted powder kinds and strengthening phase composition are single, the production process is complex, and the production cost is relatively high are solved, a frit reaction of an electrode material, a base body material and a strengthening powder material is achieved under the hot processing condition, a strengthening layer with superior performance meeting expectation is generated, and the purpose of strengthening the materialsurface is achieved. The strengthening medium powder is characterized in that the powder constituents are two or more kinds of powder of Fe powder with the purity being 99% or above, Al power, Ni powder, C powder and B4C powder to be mixed, the particle size of the powder is 1 micron-7 microns, the powder is spherical or is in a long strip shape, the powder is uniformly mixed according to the proportion of 1:1-1:3, and the powder and a base body TC4 or a hard alloy can achieve a complete frit reaction in the processing process.
Description
technical field [0001] The invention relates to a reinforced powder suitable for mixed powder quasi-dry processing, which belongs to the technical field of special processing. Background technique [0002] Titanium and titanium alloys are industrial materials with high specific strength, good heat resistance, excellent corrosion resistance, and high biocompatibility. They play an increasingly important role in military, industry, production and life. However, it has the defects of poor wear resistance and low hardness, so it needs to be surface strengthened. Currently commonly used surface strengthening techniques include EDM surface strengthening, laser surface cladding, plasma spraying, physical or chemical vapor deposition, surface carburizing or nitrogen, etc. These surface strengthening technologies need to be carried out in a specific working environment, such as a special working medium, a low vacuum environment, etc. Among them, powder mixing EDM and other processi...
Claims
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IPC IPC(8): C23C26/02
CPCC23C26/02
Inventor 蔡兰蓉刘士杰赵俊岭李敏
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE