Preparation method of HK30 material based on MIM molding and MK30 blade

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

Active Publication Date: 2018-12-18
GUANGXI UNIVERSITY OF TECHNOLOGY +1
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  • 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 increa

Method used

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  • Preparation method of HK30 material based on MIM molding and MK30 blade
  • Preparation method of HK30 material based on MIM molding and MK30 blade
  • Preparation method of HK30 material based on MIM molding and MK30 blade

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0029] Example 1:

[0030] A preparation method of HK30 material based on MIM molding, including the following steps:

[0031] (1) The HK30 stainless steel powder and hydrogenated dehydrogenated titanium powder are mixed for 5h using a four-tank mixer to obtain HK30-Ti composite powder; among them, the median diameter of HK30 stainless steel powder is 20μm, and the median of hydrogenated dehydrogenated titanium powder The particle size is 17μm; the amount of hydrogenated dehydrogenated 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) Mix the HK30-Ti composite powder obtained in step (1) with the binder, then knead, and then granulate to obtain granular feed; wherein the amount of binder is controlled to the loading of HK30-Ti composite powder 57% of the amount, the mixing temperature is 155℃, and the mixing time is 180min;

[0033] (...

Example Embodiment

[0041] Example 2:

[0042] A preparation method of HK30 material based on MIM molding, including the following steps:

[0043] (1) The HK30 stainless steel powder and hydrogenated dehydrogenated titanium powder are mixed for 5h using a four-tank mixer to obtain HK30-Ti composite powder; among them, the median diameter of HK30 stainless steel powder is 20μm, and the median of hydrogenated dehydrogenated titanium powder The particle size is 17μm; the amount of hydrogenated dehydrogenated 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) Mix the HK30-Ti composite powder obtained in step (1) with the binder, then knead, and then granulate to obtain granular feed; wherein the amount of binder is controlled to the loading of HK30-Ti composite powder 57% of the amount, the mixing temperature is 155℃, and the mixing time is 180min;

[0045] (3) The gra...

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Abstract

The invention discloses a preparation method of a HK30 material based on MIM molding. The preparation method comprises the following steps: (1) HK30 stainless steel powder and titanium powder are uniformly mixed to obtain HK30-Ti composite powder; (2) the HK30-Ti composite powder, obtained in the step (1), is mixed with a binding agent for mixing and granulation to obtain granular feeds; (3) the granular feeds, obtained in the step (2), are injected on an injection molding machine to obtain an injection blank; and (4) the injection blank, obtained in the step (3), is degreased and sintered invacuum to obtain the MK30 material. The invention further provides a HK30 blade prepared by using the HK30 material. Ti is added in the HK30 stainless steel powder, so that the sintering temperature is increased, and the high-temperature mechanical performance is 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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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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