Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of spherical 304 stainless steel powder

A technology of 304 stainless steel and spherical powder, which is applied in the field of preparation of 304 stainless steel spherical powder, can solve problems such as difficult removal of scale, achieve high sphericity, increase powder yield, and improve production efficiency.

Inactive Publication Date: 2017-05-17
SINO EURO MATERIALS TECH OF XIAN CO LTD
View PDF6 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the production of 304 stainless steel powder is limited by high temperature and easy oxidation, once oxidized, it is difficult to remove the oxide skin on the surface by other methods

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of spherical 304 stainless steel powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of 304 stainless steel spherical powders, comprises the following steps:

[0024] 1) According to the ingredients required for 304 stainless steel, the raw materials for melting and casting are obtained according to the mass percentage, Cr: 19.00%, Si: 1.00%, S: 0.03%, C: 0.08%, P: 0.045%, Mn: 2.00%, Ni: 8.00%, the rest is Fe, and the casting raw materials are smelted to obtain stainless steel ingots; 304 stainless steel ingots are made into forged bars with a microstructure density of 99.0% by forging process;

[0025] 2) Carry out fine turning processing on the forged bar. The processed electrode rod is: 75mm in diameter, 650mm in length, 0.003mm in roundness deviation, 0.05mm / 650mm in straightness deviation, and 0.899μm in roughness;

[0026] 3) Place the obtained electrode rod in the electrode rod installation chamber 2, and evacuate the atomization chamber 1 until the vacuum degree of the equipment reaches 1×10 -3 Pa filled with inert gas, ...

Embodiment 2

[0031] The preparation method of 304 stainless steel spherical powders, comprises the following steps:

[0032] 1) According to the ingredients required for 304 stainless steel, the raw materials for melting and casting are obtained according to the mass percentage, C: 0.07%, Mn: 2.00%, P: 0.045%, Si: 0.75%, Cr: 18.00%, Ni: 8.00%, and the rest For Fe, the stainless steel ingot is obtained through the melting process; through forging, the 304 stainless steel ingot is made into a forged bar with a dense structure;

[0033] 2) The forged bar is machined by a lathe and a precision CNC lathe to obtain a stainless steel electrode rod that meets the requirements of the plasma rotating electrode method. The diameter of the stainless steel electrode rod is 80mm, the length is 700mm, the roundness deviation is 0.01mm, and the straightness deviation 0.025mm / 700mm, roughness 1.0μm;

[0034] 3) Place the obtained electrode rod in the electrode rod installation room, and evacuate the atomi...

Embodiment 3

[0041] The preparation method of 304 stainless steel spherical powders, comprises the following steps:

[0042] 1) According to the ingredients required for 304 stainless steel, according to the mass percentage, the casting raw materials are obtained, C: 0.08%, Mn: 2.00%, P: 0.045%, S: 0.03%, Si: 1.00%, Cr: 20.00%, Ni : 8.00%, Cu: 1.00%, N: 0.10%, the rest is Fe, and the stainless steel ingot is obtained through the melting process; through forging, the 304 stainless steel ingot is made into a forged bar with a dense structure;

[0043] 2) The forged bar is machined by a lathe and a precision CNC lathe to obtain a stainless steel electrode rod that meets the requirements of the plasma rotating electrode method. The diameter of the stainless steel electrode rod is 50mm, the length is 200mm, the roundness deviation is 0.05mm, and the straightness deviation 0.1mm / 200mm, roughness 0.8μm;

[0044] 3) Place the obtained electrode rod in the electrode rod installation room, and evac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of spherical 304 stainless steel powder. Materials are mixed according to components of 304 stainless steel, a 304 stainless steel alloy bar is prepared with forging and machining preparation methods and then is machined into a 304 stainless steel electrode bar, the electrode bar is loaded into a reaction chamber, the reaction chamber is subjected to vacuum pumping, pre-vacuum-pumping treatment is performed on atomizing equipment, the reaction chamber is filled with inert gas in a certain ratio, and the oxygen content of the atmosphere is smaller than 0.1wt%; the electrode bar is sent into an atomizing chamber through a feeding system, the end surface of the electrode bar is heated by a plasma torch, the end melts uniformly, metal droplets are prepared under the centrifugal effect of a rotating electrode and then are instantaneously solidified into spherical metal powder, and finally, the powder is packaged through multi-layer vacuum heat sealing. The 304 stainless steel powder prepared with the method is not oxidized easily at the high temperature and is high in sphericity degree, free of hollow powder and satellite powder and controllable in particle size distribution.

Description

technical field [0001] The invention belongs to the technical field of metal and alloy powder preparation, in particular to a preparation method of 304 stainless steel spherical powder. Background technique [0002] As a common material in stainless steel, 304 stainless steel has the characteristics of high temperature resistance, corrosion resistance and excellent processing performance, and is widely used. The stainless steel powder produced by it has good corrosion resistance and durability. It can be used as a high-quality material for coating film. It has excellent covering performance and can form a shielding layer to block moisture and prevent corrosion. It can be widely used in Lu castings, Surface finishing treatment of copper-zinc castings, etc., as well as shot blasting on the surface of various metal materials. However, since the production of 304 stainless steel powder is limited by high temperature and easy oxidation, once oxidized, it is difficult to remove t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B22F9/10C22C38/58C22C38/42C22C38/02
CPCB22F9/10C22C38/001C22C38/02C22C38/42C22C38/58
Inventor 李鑫闫飞周洪宇王庆相梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com