316L stainless steel powder for 3D printing technology and preparation method thereof

A 3D printing and stainless steel technology, applied in the field of 316L stainless steel powder and its preparation, can solve the problems of low material utilization rate, macroscopic composition segregation, etc., and achieve the effects of excellent mechanical properties, high sphericity, and reduced production costs.

Active Publication Date: 2016-05-04
SHANGHAI RES INST OF MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

316L stainless steel parts manufactured by traditional processes such as casting and forging have the disadvantages of macroscopic ...

Method used

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  • 316L stainless steel powder for 3D printing technology and preparation method thereof
  • 316L stainless steel powder for 3D printing technology and preparation method thereof
  • 316L stainless steel powder for 3D printing technology and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The following steps were used to prepare 316L stainless steel powder for SLM technology:

[0038] (1) Alloy remelting: add 50kg of 316L stainless steel raw material to vacuum induction furnace for melting, the alloy composition is Ni: 10.0%, Cr: 18.0%, Mo: 2.905%, C: 0.03%, Si: 1.00%, Mn: 2.00 %, P: 0.035%, S: 0.03%, Fe: 66%. Melting furnace vacuum degree 2.1×10 -2 Pa, the smelting temperature is controlled at 1580°C, after the raw materials are completely melted, the temperature is kept for 20 minutes, and the tundish is heated to 1040°C at the same time;

[0039](2) Atomization pulverization: the alloy melt flows freely downward into the gas atomization furnace through the leakage hole at the bottom of the middle leakage bag. The atomization pressure in the gas atomization furnace is 3.5MPa. Under the impact of high-purity argon flow , the alloy melt is crushed into fine droplets, cooled and solidified to obtain 316L stainless steel powder, the powder lands at the b...

Embodiment 2

[0044] The following steps were used to prepare 316L stainless steel powder for the LENS technique:

[0045] (1) Alloy smelting: Add 50kg of 316L stainless steel raw materials into a vacuum induction furnace for smelting, the alloy composition is Ni: 14.0%, Cr: 17.0%, Mo: 2.0%, C: 0.02%, Si: 0.94%, Mn: 2.00% , P: 0.02%, S: 0.02%, Fe: 64%. The melting temperature range is 1560°C, and the vacuum degree in the vacuum induction furnace is 4×10 -2 Pa, after the raw material is completely melted, keep it warm for 20 minutes, and at the same time, heat the middle leakage bag to 1020°C;

[0046] (2) Atomized pulverization: Pour the alloy melt into the middle leakage bag, and the alloy melt flows freely downward into the gas atomization furnace through the leakage hole at the bottom of the middle leakage bag. The atomization pressure in the gas atomization furnace is 1.0MPa , under the impact of high-purity argon flow, the alloy melt is crushed into fine droplets, and after cooling a...

Embodiment 3

[0051] The following steps were used to prepare 316L stainless steel powder for EBM technology:

[0052] (1) Alloy remelting: Put 50kg of 316L stainless steel raw material into a vacuum induction furnace for melting, the alloy composition is Ni: 12.0%, Cr: 18.0%, Mo: 3.0%, C: 0.02%, Si: 0.94%, Mn: 1.00 %, P: 0.02%, S: 0.02%, Fe: 65%. Melting furnace vacuum degree 2.5×10 -2 Pa, the smelting temperature is controlled at 1550°C, after the raw materials are completely melted, keep the temperature for 20 minutes, and at the same time heat the middle leakage bag to 1070°C;

[0053] (2) Atomized pulverization: the alloy melt freely flows downward into the gas atomization furnace through the leakage hole at the bottom of the middle leakage bag. The atomization pressure in the gas atomization furnace is 2.5MPa. Under the impact of high-purity argon flow , the alloy melt is crushed into fine droplets, cooled and solidified to obtain 316L stainless steel powder, the powder lands at the...

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Abstract

The invention relates to 316L stainless steel powder for the 3D printing technology and a preparation method thereof. The vacuum melting technology is adopted for the method, an ultrasonic vibration and air flow classification method is used for matching powder of different granularities, and the 316L stainless steel powder suitable for the 3D printing technology of different types of metal is prepared through the vacuum degassing technology. Compared with the prior art, the 316L stainless steel powder has the advantages of being high in sphericity degree, uniform in granularity distribution, low in oxygen content, low in impurity content, capable of meeting performance requirements of different 3D printing technologies for powder material and promoting the development of the metal material increasing manufacturing technology and the like.

Description

technical field [0001] The invention relates to the field of metal powder preparation, in particular to a 316L stainless steel powder used for 3D printing technology and a preparation method thereof. Background technique [0002] 3D printing is a manufacturing technology that uses lasers or electron beams and other means, based on three-dimensional modeling, to add and accumulate materials layer by layer under computer control to directly quickly and accurately form parts, also known as "additive manufacturing". Additive manufacturing technology does not require traditional tools, fixtures and multi-processing procedures. Using 3D design data, parts of any complex shape can be quickly and accurately manufactured on one device. Compared with traditional material removal (or deformation) Processing and common special processing technology, additive manufacturing technology has a very high material utilization rate. [0003] Selective Laser Melting (SLM) is a method for direct...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/08B33Y70/00C22C38/44C22C38/58C22C38/04
CPCC22C38/04C22C38/44C22C38/58B22F9/082B22F2009/0824B22F2009/0848B22F10/00B22F1/14B22F10/28B22F10/34B22F10/25Y02P10/25
Inventor 吴文恒吴凯琦肖逸凡杨启云仲守亮
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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