Method for preparing B4C/17-4PH high-strength steel composite material through SLM

A composite material and high-strength steel technology, which is applied in the field of preparing B4C/17-4PH high-strength steel composite materials, can solve the problems of high cost, affecting the overall performance of materials, and cumbersome procedures, and achieve short cycle times, resource saving, and low manufacturing costs. Effect

Active Publication Date: 2022-05-31
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, preparation B 4 The methods of C / 17-4PH high-strength steel composite materials include powder metallurgy, extrusion molding, etc. However, these methods are not only costly and cumbersome to prepare composite materials, but also greatly affect the comprehensive properties of materials.

Method used

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  • Method for preparing B4C/17-4PH high-strength steel composite material through SLM
  • Method for preparing B4C/17-4PH high-strength steel composite material through SLM

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing B4C / 17-4PH high-strength steel composite material by using SLM, comprising the following steps: (1) Pretreatment of 17-4PH high-strength steel powder: the concentration is 0.06 g / L, the density is 1.055 g / cm3 (20° C. ), the sodium cetyl sulfonate aqueous solution with a viscosity of 0.02 Pa s (20°C) was evenly distributed in the 17-4PH high-strength steel powder, and then ultrasonic cleaning and magnetic stirring were performed, and the cleaning temperature was set to 60°C, The cleaning time was 2 hours, and after cleaning, it was left to stand for 10 minutes, and then ultrasonic cleaning and magnetic stirring were used for cleaning with monododecyl phosphate triethanolamine aqueous solution. The cleaning temperature was set to 60 °C, and the cleaning time was 1 hour. Dry in a hot atmosphere furnace (XQ) to finally obtain pretreated 17-4PH high-strength steel powder.

[0026] (2) Pretreatment of B4C powder: The prepared B4C powder with an average ...

Embodiment 2

[0032] A method for preparing B4C / 17-4PH high-strength steel composite material by using SLM, comprising the following steps: (1) Pretreatment of 17-4PH high-strength steel powder: the concentration is 0.07g / L, the density is 1.055g / cm3 (20°C ), the sodium cetyl sulfonate aqueous solution with a viscosity of 0.02Pa s (20℃) was evenly distributed in the 17-4PH high-strength steel powder for ultrasonic cleaning and magnetic stirring treatment. The cleaning temperature was set to 60℃, and the cleaning time was 2.5h, let stand for 20min after cleaning, and then use the monododecyl phosphate triethanolamine aqueous solution to carry out ultrasonic cleaning and magnetic stirring treatment cleaning, and set the cleaning temperature to 60 ° C and the cleaning time to 1.5h. Type atmosphere furnace (XQ) drying, and finally get pretreated 17-4PH high-strength steel powder.

[0033] (2) Pretreatment of B4C powder: The prepared B4C powder with an average grain size of 40 μm was uniformly d...

Embodiment 3

[0039] A method for preparing B4C / 17-4PH high-strength steel composite material by using SLM, comprising the following steps: (1) pretreatment of 17-4PH high-strength steel powder: the concentration is 0.08g / L, the density is 1.055g / cm3 (20°C ), the sodium cetyl sulfonate aqueous solution with a viscosity of 0.02Pa s (20℃) was evenly distributed in the 17-4PH high-strength steel powder for ultrasonic cleaning and magnetic stirring treatment. The cleaning temperature was set to 60℃, and the cleaning time was 3h, let stand for 30min after cleaning, and then perform ultrasonic cleaning and magnetic stirring treatment cleaning with monododecyl phosphate triethanolamine aqueous solution, and set the cleaning temperature to 60 °C and the cleaning time to 2h, after filtration, in an endothermic atmosphere Dry in furnace (XQ) to obtain 17-4PH high-strength steel powder after pretreatment.

[0040] (2) Pretreatment of B4C powder: The prepared B4C powder with an average grain size of 50...

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Abstract

The invention discloses a method for preparing a B4C/17-4PH high-strength steel composite material through SLM. The method comprises the following steps that (1) 17-4PH high-strength steel powder is pretreated; (2) pretreatment of B4C powder; (3) the 17-4PH high-strength steel powder obtained through pretreatment and B4C powder are mixed and subjected to ball milling, and finally mixed powder with the B4C powder evenly distributed in the 17-4PH powder is prepared; (4) filling powder according to a preset powder filling mode; (5) after powder filling is finished, SLM forming is carried out, and a complete B4C/17-4PH composite material with the B4C reinforced phase evenly distributed in a matrix is printed; and (6) the SLM-formed B4C/17-4PH composite material is subjected to solid solution aging treatment, and the B4C/17-4PH composite material with the B4C reinforced phase evenly distributed in a matrix after SLM-formed solid solution aging treatment is obtained. And compared with 17-4PH high-strength steel, the composite material has the advantages that the comprehensive properties such as attenuation resistance and corrosion fatigue resistance are greatly improved, so that the development requirements of China in the fields of aerospace, military industry, mechanical equipment and the like are met.

Description

technical field [0001] The present invention relates to a kind of preparation B by utilizing SLM 4 The method for C / 17-4PH high-strength steel composite material belongs to the technical field of metal matrix composite materials. Background technique [0002] 17-4PH high-strength steel is a martensitic precipitation hardening stainless steel, which is characterized by good attenuation resistance, corrosion fatigue resistance and water drop resistance. It is widely used in aerospace, military industry, offshore platforms and other fields. With the continuous improvement of science and technology, the performance of a single martensitic precipitation hardening stainless steel material is difficult to meet the development needs of our country. B 4 As one of the most common reinforcing phases, C added to the matrix phase can play the role of grain refinement strengthening and precipitation strengthening, thereby improving the comprehensive properties of the material such as st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B22F9/04B22F1/14B22F1/145B22F1/10B22F10/64B33Y10/00B33Y40/20B33Y70/10
CPCB22F10/28B22F9/04B22F10/64B33Y10/00B33Y40/20B33Y70/10B22F2009/043Y02P10/25
Inventor 赵占勇王建斌王少伟白培康张震王利卿李晓峰王建宏
Owner ZHONGBEI UNIV
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