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A kind of preparation method of nickel-free duplex stainless steel

A duplex stainless steel, stainless steel technology, applied in solid diffusion coating, coating, metal material coating process and other directions, can solve the problems of nickel allergy, complex process, affecting the cost of stainless steel, etc., to achieve strong anti-rust ability and production technology. simple effect

Active Publication Date: 2021-05-25
深圳市泛海统联精密制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, it is difficult for single-phase stainless steel to meet different performance requirements at the same time, and duplex stainless steel can meet different performance requirements at the same time. However, the duplex stainless steel prepared now requires a heat treatment process, which is complicated
At the same time, nickel forms a stable element as austenite, but the presence of nickel will cause some people to be allergic to nickel, and my country is a nickel-scarce country, and the high price of nickel directly affects the cost of stainless steel

Method used

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  • A kind of preparation method of nickel-free duplex stainless steel

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Effect test

Embodiment 1

[0017]Preparation method of nickel-free double-phase stainless steel, including the following preparation steps,

[0018](1) Select stainless steel feeding, the stainless steel feed comprises the following raw materials: the metal powder mass fraction is 89-91%, the adhesive mass fraction is 9-11%, the metal powder element component mass fraction is C 0.01 %, N0.53%, CR 16.69%, MO 3.16%, Si 0.46%, MN 10.96%, FE moderate;

[0019](2) Through the injection machine, the stainless steel feeding is formed into a product, the injection conditions are 150-240 MPa, the pressure pressure is 100-150 MPa, and the mold temperature is 110-150 ° C;

[0020](3) Put the molded product into the catalytic degreased furnace, remove the adhesive, the degrease conditions are the furnace cavity temperature of 100-140 ° C, the nitrogen temperature is 100-150 ° C, and the degreasing time is 180-360 min;

[0021](4) Put the degreated product to the sintering furnace for sintering, the temperature is set to room tempera...

Embodiment 2

[0024]Preparation method of nickel-free double-phase stainless steel, including the following preparation steps,

[0025](1) Select stainless steel feeding, the stainless steel feed comprises the following raw materials: the metal powder mass fraction is 89-91%, the adhesive mass fraction is 9-11%, the metal powder element component mass fraction is C 0.01 %, N0.53%, CR 16.69%, MO 3.16%, Si 0.46%, MN 10.96%, FE moderate;

[0026](2) Through the injection machine, the stainless steel feeding is formed into a product, the injection conditions are 150-240 MPa, the pressure pressure is 100-150 MPa, and the mold temperature is 110-150 ° C;

[0027](3) Put the molded product into the catalytic degreased furnace, remove the adhesive, the degrease conditions are the furnace cavity temperature of 100-140 ° C, the nitrogen temperature is 100-150 ° C, and the degreasing time is 180-360 min;

[0028](4) Put the degreated product to the sintering furnace for sintering, the temperature is set to room tempera...

Embodiment 3

[0031]Preparation method of nickel-free double-phase stainless steel, including the following preparation steps,

[0032](1) Select stainless steel feeding, the stainless steel feed comprises the following raw materials: the metal powder mass fraction is 89-91%, the adhesive mass fraction is 9-11%, the metal powder element component mass fraction is C 0.01 %, N0.53%, CR 16.69%, MO 3.16%, Si 0.46%, MN 10.96%, FE moderate;

[0033](2) Through the injection machine, the stainless steel feeding is formed into a product, the injection conditions are 150-240 MPa, the pressure pressure is 100-150 MPa, and the mold temperature is 110-150 ° C;

[0034](3) Put the molded product into the catalytic degreased furnace, remove the adhesive, the degrease conditions are the furnace cavity temperature of 100-140 ° C, the nitrogen temperature is 100-150 ° C, and the degreasing time is 180-360 min;

[0035](4) Put the degreated product to the sintering furnace for sintering, the temperature is set to room tempera...

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Abstract

The invention discloses a preparation method of nickel-free duplex stainless steel, which includes the following preparation steps: (1) Selecting stainless steel feed materials, the stainless steel feed materials include the following raw materials: metal powder mass fraction is 89-91%, adhesive The mass fraction is 9-11%, and the elemental component mass fraction of the metal powder is C 0.01%, N 0.53%, Cr 16.69%, Mo 3.16%, Si 0.46%, Mn 10.96%, and an appropriate amount of Fe; (2) By injection machine to feed stainless steel into products; (3) put the formed product into the catalytic degreasing furnace to remove the adhesive; (4) put the degreased product into the sintering furnace for sintering; (5) put the product into Conduct composition and performance testing, including salt spray testing and polishing corrosion on the product, and observe the crystal structure of the product under a crystal phase microscope. The invention does not require a heat treatment process and only needs a one-step sintering process. The production process is simple. The nickel-free duplex stainless steel prepared by this method has strong anti-rust ability.

Description

Technical field [0001] The invention relates to the technical field of steel alloy material preparation processes, and specifically refers to a method for preparing nickel-free duplex stainless steel. Background technique [0002] At present, it is difficult for single-phase stainless steel to meet different performance requirements at the same time. Duplex stainless steel can have different performance requirements at the same time. However, the duplex stainless steel currently prepared requires a heat treatment process, which is complex. At the same time, nickel is a stable element that forms austenite, but the presence of nickel can cause nickel allergies in some people. Moreover, our country is a nickel-scarce country, and the price of nickel is high, which directly affects the cost of stainless steel. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a method for prepar...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/22C22C38/38C22C33/02C23C8/26
CPCC22C33/0285C22C38/001C22C38/02C22C38/22C22C38/38C23C8/26
Inventor 杨虎侯春伟赵小杨
Owner 深圳市泛海统联精密制造股份有限公司
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