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Pre-alloying powder for diamond tool and manufacturing method thereof

A diamond tool and pre-alloying technology, applied in the field of powder metallurgy, can solve the problems of unfavorable sintered diamond control, high environmental treatment cost, unacceptable market, etc., and achieve the effect of reducing raw material cost, large production capacity and production cost.

Inactive Publication Date: 2010-06-23
ADVANCED TECH BAZHOU SPECIAL POWDER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the reduction of co-precipitated oxides, the total oxygen content of the pre-alloyed powder is relatively high, which is not conducive to sintering and holding diamonds, and the environmental treatment costs are high and the production capacity is small. It usually contains more than 20% by mass of cobalt, making The price is high and the market is not easy to accept

Method used

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  • Pre-alloying powder for diamond tool and manufacturing method thereof
  • Pre-alloying powder for diamond tool and manufacturing method thereof
  • Pre-alloying powder for diamond tool and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This Example 1 is a comparison of the basic properties of the pre-alloyed powder and the sintered carcass without adding B and adding a small amount of B in the same alloy Fe-Cu-Co system, see Table 1 and Table 2 respectively.

[0037] Table 1 Basic properties of Fe-Cu-Co alloy powders without B and with trace amounts of B

[0038]

[0039] Table 2 Basic properties of Fe-Cu-Co sintered matrix without B and with trace B

[0040] powder

[0041] The main phase of the prealloyed powder in Example 1 is Fe phase, the secondary phase is Cu phase, and the main phase is strengthened by 10% Co solid solution. The addition of a small amount of B can increase the three-point bending strength of the carcass by 25-28%, and the flexural modulus of elasticity by about 7%. This means that the wear resistance of the carcass and the holding force of the diamond will be improved. The effect of trace B is that it refines Fe solid solution grains and strengthens grain boundar...

Embodiment 2

[0043] Example 2 is a Cu-based pre-alloyed powder, and the composition system is Cu-Fe-Co-B. The basic properties of its powder and sintered matrix are listed in Table 3 and Table 4 respectively.

[0044] Table 3 Basic properties of Cu-Fe-Co-B powder

[0045]

[0046] Table 4 Basic properties of Cu-Fe-Co-B sintered matrix

[0047] powder

[0048] In Example 2, the main phase of the prealloyed powder is Cu phase, the secondary phase is Fe phase, and the Cu and Fe phases are solid solution strengthened with 10% Co. Adding a small amount of B, which is 0.08% in this example, makes the three-point bending strength of the sintered carcass reach 1100-1150MPa, and the bending elastic modulus is 46-48GPa. The bending strength is significantly higher than that of the traditional Cu-based carcass, which indicates that the wear resistance of the carcass will be improved. The Cu-based matrix has a lower flexural elastic modulus than the Fe-based matrix, which means that it...

Embodiment 3

[0050] Example 3 is an Fe-based pre-alloyed powder that does not contain Co, and the composition system is Fe-Cu-Ni-Sn-B. The basic properties of its powder and sintered matrix are listed in Table 5 and Table 6, respectively.

[0051] Table 5 Basic properties of Fe-Cu-Ni-Sn-B powder

[0052]

[0053] Table 6 Basic properties of Fe-Cu-Ni-Sn-B sintered matrix

[0054] powder

[0055] The outstanding feature of Example 3 is that it does not contain Co, the main phase is Fe phase, the secondary phase is Cu phase, the main phase and secondary phase are strengthened by Ni solid solution, and Sn meets the special requirements of "sharp" tools. The addition of Sn, as mentioned above, can form Cu-Sn electronic compounds with Cu (the most common is Cu 31 sn 8 , Cu 3 Sn or similar compounds) can also form Fe-Sn compounds with Fe. These compounds have high hardness but are brittle. On the microstructure, these small amounts of compound phases and solid solution matrix ph...

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Abstract

The invention relates to pre-alloying powder for a diamond tool and a manufacturing method thereof. The pre-alloying powder adopts Fe phase or Cu phase as the main phase. The pre-alloying powder is characterized in that: trace B strengthens crystal boundary and refines crystal particles; Ni, Co and Me (at least one of Mn, Cr, Si, Ti, V, W and Mo is selected) are adopted as strengthening elements; and Sn, P and C further adjusts an alloy structure. The pre-alloying powder is prepared by the high-pressure water atomization powdering technology. The manufacturing method is characterized in that: alloy liquid is smashed by high-pressure water which is preferential for many times, the meso-position diameter D50 of the powder measured by a laser particle-size meter is within 7 to 18mum, and the preference is within 7 to 13mum; the full oxygen content measured by a full oxygen analyzer is smaller than or equal to 0.35% (mass), and the preference is smaller than or equal to 0.25% (mass).

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to prealloyed powder for diamond cutting tools and its manufacturing technology. Background technique [0002] The vast majority of diamond tools are impregnated tools made by mixing binder and artificial diamond particles, pressing and sintering. Binder is also called carcass. Carcass powder is mainly metal powder, but also resin, ceramic powder and so on. Currently, electrolytic copper powder, reduced iron powder, and reduced cobalt powder are the most widely used metal powders. Ultrafine cobalt powder has many advantages when used as a matrix, but its price is expensive and fluctuates greatly, and its use is greatly restricted. [0003] The diamond impregnated tool wears the matrix ahead of time, the diamond particles are exposed, and the exposed diamond acts on the workpiece. When the matrix is ​​worn enough to hold the exposed diamond particles, these diamond particles will ...

Claims

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Application Information

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IPC IPC(8): C22C1/04B22F1/00B22F9/08
Inventor 罗锡裕黄漫钟正刚麻洪秋王峻李斌丁士安金成海
Owner ADVANCED TECH BAZHOU SPECIAL POWDER CO LTD
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