Stainless steel powder produced by utilizing waste leftover materials and preparation method of stainless steel powder

Abstract

The invention provides stainless steel powder produced by utilizing waste leftover materials, which is prepared from the following raw materials in parts by weight: 30-93 parts of stainless steel waste leftover materials, 0-39 parts of DT4 pure iron, 3-17 parts of chromium, 0-4 parts of nickel, 0-1 part of molybdenum, 0-1 part of silicon, 0-5 parts of electrolytic copper and 0-5 parts of niobium. The stainless steel powder produced from the waste leftover materials is prepared from the waste stainless steel leftover materials and other corresponding alloy raw materials, secondary utilization of resources is achieved, and the development strategy of energy conservation and emission reduction in China is met; the preparation method is a high-pressure water mist process, the method is simple and high in efficiency, and the stainless steel powder is uniform in particle size and controllable in quality.

Description

technical field

[0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a stainless steel powder produced by using waste leftover materials and a preparation method thereof. Background technique

[0002] In metallurgical powder production, the chemical composition of the powder is an important indicator of the product. In the smelting process, most of the bars with standard chemical composition are put into the melting furnace to be smelted into molten steel. The so-called bar stock is steel that has been refined into a standard chemical composition by a steel mill, and the powder metallurgy industry also becomes the base material. When producing powder, the bar material with standard chemical composition is directly smelted into molten steel in an intermediate frequency melting furnace, and then atomized into powder by a powder making device.

[0003] There are a large number of manufacturers of stainless steel complete sets o...

Examples

Embodiment 1

[0033] Embodiment 1 utilizes the stainless steel powder that waste leftover material produces

[0034] A kind of stainless steel powder that utilizes waste leftover material to produce, is made of the following raw materials by weight: 92 parts of stainless steel waste leftover material, 3.67 parts of chromium, 3.28 parts of nickel, 0.79 part of molybdenum, 0.13 part of silicon;

[0035] A kind of preparation method of the stainless steel powder that utilizes waste leftover material to produce, comprises the following steps:

[0036] Step 1: Sorting and grading the waste stainless steel scraps, removing oil stains on the surface and cleaning, then dehydrating and drying;

[0037] Step 2: Put stainless steel scraps and other alloy raw materials directly into the intermediate frequency melting furnace according to the process ratio, and melt them into molten steel, which specifically includes the following steps:

[0038] S21: When the cold furnace is started, the temperature i...

Embodiment 2

[0052] A kind of stainless steel powder that utilizes waste leftovers to produce is made of the following raw materials by weight: 92.2 parts of stainless steel waste leftovers, 4.13 parts of chromium, 3.16 parts of nickel, and 0.26 parts of silicon;

[0053] The preparation method of Example 2 refers to Example 1. The difference from Example 1 is that the high-pressure water atomization pressure in step 4 is 90MPa, the flow rate of molten steel is 8kg / min, and the water flow rate is 0.1m 3 / min.

Embodiment 3

[0055] A kind of stainless steel powder that utilizes waste leftovers to produce is made of the following raw materials by weight: 38.8 parts of stainless steel waste leftovers, 16.72 parts of chromium, 0.98 parts of nickel, 4.13 parts of copper, 0.47 parts of niobium, and 38.8 parts of DT4 pure iron;

[0056] The preparation method of Example 3 refers to Example 1. The difference from Example 1 is that the high-pressure water atomization pressure in step 4 is 93MPa, the flow rate of molten steel is 9kg / min, and the water flow rate is 0.12m 3 / min.

technical field

[0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a stainless steel powder produced by using waste leftover materials and a preparation method thereof. Background technique

[0002] In metallurgical powder production, the chemical composition of the powder is an important indicator of the product. In the smelting process, most of the bars with standard chemical composition are put into the melting furnace to be smelted into molten steel. The so-called bar stock is steel that has been refined into a standard chemical composition by a steel mill, and the powder metallurgy industry also becomes the base material. When producing powder, the bar material with standard chemical composition is directly smelted into molten steel in an intermediate frequency melting furnace, and then atomized into powder by a powder making device.

[0003] There are a large number of manufacturers of stainless steel complete sets o...

Examples

Embodiment 1

[0033] Embodiment 1 utilizes the stainless steel powder that waste leftover material produces

[0034] A kind of stainless steel powder that utilizes waste leftover material to produce, is made of the following raw materials by weight: 92 parts of stainless steel waste leftover material, 3.67 parts of chromium, 3.28 parts of nickel, 0.79 part of molybdenum, 0.13 part of silicon;

[0035] A kind of preparation method of the stainless steel powder that utilizes waste leftover material to produce, comprises the following steps:

[0036] Step 1: Sorting and grading the waste stainless steel scraps, removing oil stains on the surface and cleaning, then dehydrating and drying;

[0037] Step 2: Put stainless steel scraps and other alloy raw materials directly into the intermediate frequency melting furnace according to the process ratio, and melt them into molten steel, which specifically includes the following steps:

[0038] S21: When the cold furnace is started, the temperature i...

Embodiment 2

[0052] A kind of stainless steel powder that utilizes waste leftovers to produce is made of the following raw materials by weight: 92.2 parts of stainless steel waste leftovers, 4.13 parts of chromium, 3.16 parts of nickel, and 0.26 parts of silicon;

[0053] The preparation method of Example 2 refers to Example 1. The difference from Example 1 is that the high-pressure water atomization pressure in step 4 is 90MPa, the flow rate of molten steel is 8kg / min, and the water flow rate is 0.1m 3 / min.

Embodiment 3

[0055] A kind of stainless steel powder that utilizes waste leftovers to produce is made of the following raw materials by weight: 38.8 parts of stainless steel waste leftovers, 16.72 parts of chromium, 0.98 parts of nickel, 4.13 parts of copper, 0.47 parts of niobium, and 38.8 parts of DT4 pure iron;

[0056] The preparation method of Example 3 refers to Example 1. The difference from Example 1 is that the high-pressure water atomization pressure in step 4 is 93MPa, the flow rate of molten steel is 9kg / min, and the water flow rate is 0.12m 3 / min.

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