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A preparation method of HK30 material based on MIM molding and HK30 blade

A hk30-ti, feeding technology, applied in the field of powder metallurgy, can solve the problems of over-burning and under-burning, and achieve the effect of increasing the sintering temperature, widening the sintering window, and improving the yield rate

Inactive Publication Date: 2020-06-02
GUANGXI UNIVERSITY OF TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Relevant literature shows that during the sintering process of HK30, its high-temperature flexural strength will increase with the increase of sintering temperature. At about 1310°C, the high temperature (800°C) tensile strength is about 420MPa

Method used

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  • A preparation method of HK30 material based on MIM molding and HK30 blade
  • A preparation method of HK30 material based on MIM molding and HK30 blade
  • A preparation method of HK30 material based on MIM molding and HK30 blade

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Experimental program
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Effect test

Embodiment 1

[0030] A method for preparing HK30 material based on MIM molding, comprising the following steps:

[0031] (1) Mix HK30 stainless steel powder and hydrogenated dehydrogenation titanium powder with a four-pot mixer for 5 hours to obtain HK30-Ti composite powder; wherein, the median particle size of HK30 stainless steel powder is 20 μm, and the median particle size of hydrogenated dehydrogenation titanium powder is The particle size is 17 μm; the amount of hydrogenated dehydrogenation titanium powder accounts for 1.2% of the total amount of HK30-Ti composite powder; the composition of HK30 stainless steel powder and titanium powder is shown in Table 1 and Table 2 below;

[0032] (2) After mixing the HK30-Ti composite powder obtained in step (1) with the binder, knead, and then granulate to obtain granular feed; wherein, the amount of binder is controlled as the loading of the HK30-Ti composite powder 57% of the amount, the mixing temperature is 155°C, and the mixing time is 180m...

Embodiment 2

[0042] A method for preparing HK30 material based on MIM molding, comprising the following steps:

[0043] (1) Mix HK30 stainless steel powder and hydrogenated dehydrogenation titanium powder with a four-pot mixer for 5 hours to obtain HK30-Ti composite powder; wherein, the median particle size of HK30 stainless steel powder is 20 μm, and the median particle size of hydrogenated dehydrogenation titanium powder is The particle size is 17 μm; the amount of hydrogenated dehydrogenation titanium powder accounts for 0.4% of the total amount of HK30-Ti composite powder; the composition of HK30 stainless steel powder and titanium powder is the same as in Example 1;

[0044](2) After mixing the HK30-Ti composite powder obtained in step (1) with the binder, knead, and then granulate to obtain granular feed; wherein, the amount of binder is controlled as the loading of the HK30-Ti composite powder 57% of the amount, the mixing temperature is 155°C, and the mixing time is 180min;

[004...

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Abstract

The invention discloses a preparation method of HK30 material based on MIM molding, which comprises the following steps: (1) uniformly mixing HK30 stainless steel powder and titanium powder to obtain HK30-Ti composite powder; (2) mixing the obtained in step (1) HK30‑Ti composite powder is mixed with binder, mixed, and then granulated to obtain granular feed; (3) inject the granular feed obtained in step (2) on an injection molding machine to obtain an injection green body; (4) The injection green body obtained in step (3) is degreased and vacuum sintered to obtain the HK30 material. The present invention also provides an HK30 blade prepared by using the above-mentioned HK30 material. In the present invention, by adding Ti to the HK30 stainless steel powder, the sintering temperature is effectively increased, and the high-temperature mechanical properties are further improved.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, and in particular relates to a preparation method of HK30 material and HK30 blades. Background technique [0002] HK30 is a high-chromium-nickel austenitic stainless steel. Due to its excellent corrosion resistance and oxidation resistance at high temperatures, it has been widely used in the fields of automobiles, chemicals, and construction machinery. However, austenitic stainless steel HK30 sticks to the knife more seriously during processing, and it is difficult to prepare small and medium-sized HK30 parts with complex shapes by machining methods. The preparation of HK30 by metal injection molding method (MIM process) has the advantages of high material utilization rate, low cost and uniform structure. However, the two steps of adding binder and degreasing in the MIM process easily lead to fluctuations in the carbon content of the final product, resulting in a narrow sintering window, easy ov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/22B22F1/00B22F3/10B22F5/00
CPCB22F3/1007B22F3/225B22F5/00B22F2998/10B22F1/10
Inventor 何浩李益民刘晨陈永志
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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