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

Method for preparing fine spherical stainless steel powder

A stainless steel powder and spherical technology, applied in the field of preparation of fine spherical stainless steel powder, can solve the problems of restricting the popularization and application of gas atomized stainless steel powder, affecting the performance of stainless steel products, coarse powder particle size, etc., achieving easy automatic control and widening the scope of application , the effect of uniform distribution of elements

Inactive Publication Date: 2014-12-24
SUZHOU ZHIYAN NEW MATERIAL TECH CO LTD
View PDF5 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional preparation methods of fine spherical stainless steel powder are water atomization method and gas atomization method, but there are great differences in the quality, performance and cost of stainless steel powder prepared by these two methods, which are mainly reflected in the following aspects: (1 ) Water atomization powder has certain advantages in powder fineness and cost, but the powder is basically irregular in shape, which greatly affects the performance of subsequent stainless steel products
(2) Gas atomization powder production has certain advantages in powder oxygen content and powder sphericity, but the overall particle size of the prepared powder is relatively coarse, the cost is high, and the technology is difficult, which greatly limits the popularization and application of gas atomization stainless steel powder

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
  • Method for preparing fine spherical stainless steel powder
  • Method for preparing fine spherical stainless steel powder

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] The preparation method of the fine spherical stainless steel powder of the present invention comprises the following steps:

[0019] First, directly select 316L stainless steel powder or use C, Si, S, P, Fe, Cr, Ni, Mo, Mn elements to form an alloy in proportion. Since it is possible to select appropriate proportions of elements to prepare raw materials according to material requirements, the element design can be carried out according to material requirements, which broadens the scope of application of raw materials, and can choose relatively cheap and cheap raw materials.

[0020] Then use hydrogen or argon as the carrier gas to send the above-mentioned alloy feed or 316L stainless steel powder into the plasma torch for vaporization and melting to form an alloy body. The high-frequency plasma equipment used in this step is as figure 1 As shown, it mainly includes feeder, plasma torch, RF generator (radio frequency generator), heat exchange chamber and gas-solid separ...

Embodiment 1

[0024] This embodiment provides a preparation method of fine spherical stainless steel powder, comprising the following steps:

[0025] (a) Select 316L stainless steel powder;

[0026] (b) Use argon as the carrier gas to send the stainless steel powder into the plasma torch for vaporization and melting to form an alloy body. The flow rate of the carrier gas is 0.5m 3 / h, the feed rate is 5g / min, and the power of the plasma torch is 50kW, and the flow rate of the generated gas is 1m 3 / h of argon, side gas flow rate 1m 3 / h of argon, the pressure is a negative pressure of 200mm Hg;

[0027] (c) Introduce the alloy body into a heat exchange chamber with a temperature of 150°C, and the heat exchange adopts a flow rate of 1m 3 / h of argon;

[0028] (d) Introduce the fine spherical stainless steel powder into the gas-solid separation chamber to collect the solid powder.

Embodiment 2

[0030] This embodiment provides a preparation method of fine spherical stainless steel powder, comprising the following steps:

[0031] (a) Select C, Si, S, P, Fe, Cr, Ni, Mo, and Mn elements to form alloys in proportion, among which C≤0.03%, Si≤1%, Mn≤2%, P≤0.035% , S≤0.03%, Ni is 10%~14%, Cr is 16%~18%, Mo is 2%~3%, and the balance is Fe (mass ratio);

[0032] (b) Use hydrogen as the carrier gas to send the alloy material into the plasma torch for vaporization and melting to form an alloy body. The flow rate of the carrier gas is 5m 3 / h, the feed rate is 100g / min, and the power of the plasma torch is 5kW, and the flow rate of the generated gas is 3m 3 / h of argon, the side gas flow rate is 20m 3 / h of argon, the pressure is a negative pressure of 50mm Hg;

[0033] (c) Lead the alloy body into a heat exchange chamber with a temperature of 150 °C, and the heat exchange adopts a flow rate of 1 m 3 / h of hydrogen;

[0034] (d) Introduce the fine spherical stainless steel p...

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

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing fine spherical stainless steel powder. The method comprises the following steps of (a) selecting stainless steel powder or preparing C, Si, S, P and other elements into an alloy feed; (b) sending the stainless steel powder or the alloy feed into a plasma torch for vaporization smelting by using hydrogen or argon as carrier gas so as to obtain an alloy body; (c) performing heat exchange on the alloy body to obtain the fine spherical stainless steel powder; (d) introducing the fine spherical stainless steel powder into a gas-solid separation chamber to collect solid powder. According to the method, the stainless steel powder is utilized, or C, Si, S, P and other elements are prepared into the alloy feed, a raw material can be prepared by an element mixing method, and the application range of the raw material is widened; the carrier gas is utilized to feed the raw material into the plasma torch, and the fine spherical stainless steel powder is formed through heat exchange, so that the raw material scattering uniformity is improved, and the stainless steel powder with uniformly distributed elements and uniformly distributed particle size is formed.

Description

technical field [0001] The invention relates to a preparation method of stainless steel powder, in particular to a preparation method of fine spherical stainless steel powder. Background technique [0002] With the development of 3D printing and modern powder metallurgy technology, there are more and more types of stainless steel products, and they are developing in the direction of high strength, high density and high precision. [0003] 316L stainless steel is widely used in aviation, aerospace, marine engineering, automobile industry, bioengineering and other fields because of its low density, high specific strength, good corrosion resistance, and excellent heat resistance. It is an important foundation Industrial raw materials. The fine spherical 316L stainless steel powder shows unique advantages in chemical activity, mechanical properties, fluidity, bulk density, etc., and is often used in laser rapid prototyping and other fields. With the continuous development of ...

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): B22F9/08
Inventor 方鹏
Owner SUZHOU ZHIYAN NEW MATERIAL TECH CO LTD
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com