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Micro spherical ferritic stainless steel powder and preparation method thereof

A technology of stainless steel powder and ferrite, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of high cost, high technical difficulty, affecting the performance of stainless steel products, etc., and achieve the effect of improving strength

Active Publication Date: 2017-01-11
盐城市科瑞达科技咨询服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 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 pulverization 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 pulverization has certain advantages in powder oxygen content and powder spherical shape There are certain advantages in high density, 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 atomized stainless steel powder

Method used

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  • Micro spherical ferritic stainless steel powder and preparation method thereof
  • Micro spherical ferritic stainless steel powder and preparation method thereof
  • Micro spherical ferritic stainless steel powder and preparation method thereof

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Embodiment 1

[0024] The present embodiment provides a kind of fine spherical iron cable body stainless steel powder, and it comprises the composition of following percentage by weight:

[0025]

[0026] The balance is Fe and unavoidable impurities;

[0027] The preparation method of the above-mentioned fine spherical iron cord body stainless steel powder, it comprises the following steps:

[0028] (a) select C, Si, Mn, Ti, Cr, Cu, Mg, Fe elements to form alloy raw materials;

[0029] (b) Use argon as the carrier gas to feed the stainless steel powder or alloy into the plasma torch for vaporization and melting to form an alloy body; the flow rate of the carrier gas is 0.2m 3 / h, the feeding rate is 1g / min, the power of the plasma torch is 5kW, and the flow rate of the generated gas is 10m 3 / h of argon, the side gas flow rate is 5m 3 / h of argon, the pressure range is a negative pressure of 100mm Hg;

[0030] (c) heat-exchange the alloy body with cooling gas to form fine spherical st...

Embodiment 2

[0033] This embodiment provides a fine spherical ferritic stainless steel powder, the mass content of its components is consistent with that in Example 1, the difference is that its preparation method includes the following steps:

[0034] (a) select C, Si, Mn, Ti, Cr, Cu, Mg, Fe elements to form alloy raw materials;

[0035] (b) Use hydrogen or argon as the carrier gas to send the stainless steel powder or alloy into the plasma torch for vaporization and melting to form an alloy body; the flow rate of the carrier gas is 1m 3 / h, the feed rate is 20g / min, the power of the plasma torch is 20kW, and the flow rate of the generated gas is 15m 3 / h of argon, the side gas flow rate is 25m 3 / h of argon, the pressure range is a negative pressure of 150mm Hg;

[0036] (c) heat-exchange the alloy body with cooling gas to form fine spherical stainless steel powder, and the flow rate of the cooling gas is 15m 3 / h;

[0037] (d) introducing the fine spherical stainless steel powder in...

Embodiment 3

[0039] This embodiment provides a fine spherical ferritic stainless steel powder, the mass content of its components is consistent with that in Example 1, the difference is that its preparation method includes the following steps:

[0040] (a) select C, Si, Mn, Ti, Cr, Cu, Mg, Fe elements to form alloy raw materials;

[0041] (b) Use hydrogen or argon as the carrier gas to send the stainless steel powder or alloy 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 10g / min, the power of the plasma torch is 10kW, and the flow rate of the generated gas is 12m 3 / h of argon, the side gas flow rate is 20m 3 / h of argon, the pressure range is a negative pressure of 120mm Hg;

[0042] (c) heat-exchange the alloy body with cooling gas to form fine spherical stainless steel powder, and the flow rate of the cooling gas is 10m 3 / h;

[0043] (d) introducing the fine spherical stainless steel powder ...

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Abstract

The invention relates to micro spherical ferritic stainless steel powder and a preparation method thereof. The micro spherical ferritic stainless steel powder comprises, by weight, 0.01%-0.03% of C, 0.1%-0.3% of Si, 0.1%-0.3% of Mn, 1%-5% of Ti, 15%-18% of Cr, 0.2%-0.5% of Cu, 0.2%-0.5% of Mg and the balance Fe and inevitable impurities. On one hand, the formula is formed by elements, such as C, Si, Ti, Cu and Mg, of a specific ratio, on the other hand, a large content of Ti is added, and in this way, the strength and tenacity of stainless steel can be improved and the service life of the stainless steel can be prolonged.

Description

technical field [0001] The invention belongs to the field of metal materials and relates to a stainless steel powder, in particular to a fine spherical ferritic stainless steel powder and a preparation method thereof. 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. Due to its low density, high specific strength, good corrosion resistance, excellent heat resistance and other excellent properties, ferritic stainless steel is widely used in aviation, aerospace, marine engineering, automobile industry, bioengineering and other fields. It is an important basic industrial raw materials. Ferritic 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 fiel...

Claims

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Application Information

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IPC IPC(8): C22C38/28C22C38/20C22C38/02C22C38/04C22C38/32
CPCC22C38/002C22C38/02C22C38/04C22C38/20C22C38/28C22C38/32B22F9/082B22F1/065
Inventor 朱建惠王斌仇如成侍正存仇鑫
Owner 盐城市科瑞达科技咨询服务有限公司
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