A method for preparing spherical powder of high-strength titanium alloy for additive manufacturing

A spherical powder, additive manufacturing technology, applied in the field of powder metallurgy, to achieve the effect of simplifying the method, improving the service life and increasing the atomization speed

Active Publication Date: 2021-10-26
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the finely processed titanium alloy electrode rod is put into the plasma rotating electrode atomization powder making equipment for atomization powder making, and the preparation of titanium alloy spherical powder is realized by controlling various process parameters of atomization powder making, which solves the problem. It improves the refinement of spherical powder, prevents the segregation of Fe elements in spherical powder, and avoids the formation of β spots, etc., and realizes the large-scale production of product quality stability. The method is simplified and feasible, and the quality of the prepared titanium alloy spherical powder is stable.

Method used

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  • A method for preparing spherical powder of high-strength titanium alloy for additive manufacturing
  • A method for preparing spherical powder of high-strength titanium alloy for additive manufacturing

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Experimental program
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Effect test

Embodiment 1

[0030] This embodiment includes the following steps:

[0031] Step 1, finishing the titanium alloy electrode rod; the composition of the titanium alloy electrode rod is Ti-1Al-8V-5Fe, the tensile strength is 1458MPa, and the diameter is 80mm; the process of the finishing process is: before and after Male and female thread processing, surface finishing, fine grinding and straightening;

[0032] Step 2. Put the finished titanium alloy electrode rod into the dynamic seal of the plasma rotary electrode atomization powder making equipment in step 1, and vacuum the plasma rotary electrode atomization powder making equipment to atomize the plasma rotary electrode The vacuum degree in the milling equipment is 0.8×10 -3 Pa; the dynamic seal adopts a ball bearing structure, and the sealing ring of the dynamic seal is made of polyurethane;

[0033] Step 3. Introduce the mixed gas into the plasma rotary electrode atomization powder making equipment after vacuuming in step 2, and then st...

Embodiment 2

[0038] This embodiment includes the following steps:

[0039] Step 1, finishing the titanium alloy electrode rod; the composition of the titanium alloy electrode rod is Ti-1Al-8V-5Fe, the tensile strength is 1453MPa, and the diameter is 90mm; the process of the finishing process is: before and after Male and female thread processing, surface finishing, fine grinding and straightening;

[0040] Step 2. Put the finished titanium alloy electrode rod into the dynamic seal of the plasma rotary electrode atomization powder making equipment in step 1, and vacuum the plasma rotary electrode atomization powder making equipment to atomize the plasma rotary electrode The vacuum degree in the milling equipment is 0.9×10 -3 Pa; the dynamic seal adopts a ball bearing structure, and the sealing ring of the dynamic seal is made of polyurethane;

[0041] Step 3. Introduce the mixed gas into the plasma rotary electrode atomization powder making equipment after vacuuming in step 2, and then st...

Embodiment 3

[0045] This embodiment includes the following steps:

[0046] Step 1, finishing the titanium alloy electrode rod; the composition of the titanium alloy electrode rod is Ti-1Al-8V-5Fe, the tensile strength is 1448MPa, and the diameter is 70mm; the process of the finishing process is: before and after Male and female thread processing, surface finishing, fine grinding and straightening;

[0047] Step 2. Put the finished titanium alloy electrode rod into the dynamic seal of the plasma rotary electrode atomization powder making equipment in step 1, and vacuum the plasma rotary electrode atomization powder making equipment to atomize the plasma rotary electrode The vacuum degree in the milling equipment is 0.7×10 -3 Pa; the dynamic seal adopts a ball bearing structure, and the sealing ring of the dynamic seal is made of polyurethane;

[0048] Step 3. Introduce the mixed gas into the plasma rotary electrode atomization powder making equipment after vacuuming in step 2, and then st...

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Abstract

The invention discloses a method for preparing spherical powder of high-strength titanium alloy used for additive manufacturing, which comprises the following steps: 1. finishing titanium alloy electrode rod; 2. putting the finished titanium alloy electrode rod into plasma rotation Electrode atomization powder making equipment, and vacuumize; 3. Introduce mixed gas into the plasma rotary electrode atomization powder making equipment after vacuuming, carry out atomization powder making, and obtain atomized powder; 4. Put the atomized powder into Vacuum packaging to obtain titanium alloy spherical powder. The invention puts the finished titanium alloy electrode rod into the plasma rotary electrode atomization powder making equipment for atomization powder making, and realizes the preparation of titanium alloy spherical powder by controlling various process parameters of atomization powder making, and solves the problem of The refinement of the spherical powder, the prevention of the segregation of the Fe element in the spherical powder, the avoidance of the formation of β spots and other problems have realized the large-scale production of product quality stability, the method is simplified and feasible, and the quality of the prepared titanium alloy spherical powder is stable.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a method for preparing spherical powder of high-strength titanium alloy for additive manufacturing. Background technique [0002] The weight of titanium metal is only about 45% of that of low-carbon steel. Due to its high specific strength and excellent corrosion resistance, it is widely used in special places in various industrial fields. It is often mixed with some other metal to further increase its strength. As early as 50 years ago, metallographers began to mix titanium with cheaper iron, vanadium, and aluminum metals to further increase the strength. After long-term research and application experiments by scientists, they have obtained good resistance The Ti-1Al-8V-5Fe (hereinafter referred to as Ti185) alloy with corrosion resistance, high specific strength and good fatigue resistance has promoted the development of industries such as aerospace, medi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/14B22F1/00C22C14/00
CPCB22F9/14C22C14/00B22F1/065
Inventor 李增峰赵少阳谈萍沈垒王利卿汤慧萍王建殷京瓯
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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