CN105525186A - High-corrosion-resistance stainless steel and preparation method thereof - Google Patents

Abstract

The invention relates to high-corrosion-resistance stainless steel and a preparation method thereof, and belongs to the technical field of preparation of stainless steel. The stainless steel comprises the following components in parts by weight: 35-40 parts of Fe3O4, 40-45 parts of Fe2O3, 1-3 parts of CuO, 3-7 parts of MgO, 5-8 parts of SiO2, 3-5 parts of ZnO, and 1-3 parts of TiO2. The preparation method comprises the following steps: the raw materials are put in a ball mill for grinding until ball-milled powder grains are refined to 1-3 nm; the grinded powder is sintered; the sintering conditions are as follows: the sintering pressure is 45-50 MPa; the sintering temperature is 1150-1200 DEG C; the heating speed is 100-120 DEG C/min; the sintering insulation time is 20-25 minutes; the mold reversal is performed after sintering; and the freezing is performed to obtain the high-corrosion-resistance stainless steel.

Description

A kind of highly corrosion resistant stainless steel and preparation method thereof

Technical field

The present invention relates to a kind of stainless steel, be specifically related to a kind of highly corrosion resistant stainless steel and preparation method thereof, belong to stainless steel preparing technical field.

Background technology

Stainless steel (StainlessSteel) is the abbreviation of Stainless Acid Resistant Steel, and the weak corrosive mediums such as resistance to air, steam, water or the steel grade with rustless property are called stainless steel; And steel grade resistant to chemical media being corroded chemical etchings such as () acid, alkali, salt becomes duriron.Make their solidity to corrosion different due to both differences in chemical composition, common stainless steel is not resistant to chemical media corrosion generally, and duriron then generally all has rustless property.

Stainless solidity to corrosion reduces with the increase of carbon content, and therefore, most of stainless carbon content is all lower, is maximumly no more than 1.2%, the ω c(carbon content of some steel) even lower than 0.03%.Main alloy element in stainless steel is Cr(chromium), only have when Cr content reaches certain value, steel have solidity to corrosion.Therefore, the general Cr(chromium of stainless steel) content is at least 10.5%.Also containing elements such as Ni, Ti, Mn, N, Nb, Mo, Si, Cu in stainless steel.

Due to stainless steel structure handsome in appearance, good corrosion resistance, be easy to safeguard and Life cycle low cost and other advantages, make it in building structure, have wide suitability.From 20 beginnings of the century, stainless steel just starts to adopt in building structure, and the initial stage is mainly used in decorative engineering, and starts the building enclosure and the roof structure that are applied to buildings.Over nearly 20 years, along with the revision of the relevant design specifications such as Europe and the U.S., the application of stainless steel structure increases gradually.In some landmark buildings, because stainless steel is under the prerequisite meeting structural requirement, the requirements such as the aesthetics of architecture, corrosion resistance and weather resistance can also be met, receive the favor of building structure industry.

Highly corrosion resistant stainless steel refers to the stainless steel with high-corrosion resistance, is applicable to multiple fields.CN201310532589.5 discloses a kind of corrosion-resistant stainless steel coffee pot material and preparation method thereof, corrosion-resistant stainless steel coffee pot material is made up of the chemical composition of following mass percent: C0.03 ~ 0.06%, Cr16 ~ 20%, Si0.8 ~ 1.2%, Mn0.6 ~ 1%, Ni2 ~ 3%, B0.0001 ~ 0.002%, V0.4 ~ 0.6%, Mo3 ~ 4.5%, W0.25 ~ 0.35%, N0.18 ~ 0.22%, S≤0.004%, P≤0.014%, Ag0.25 ~ 0.35%, Cu2.5 ~ 3.5%, Ce0.001 ~ 0.012%, La0.03 ~ 0.08%, all the other are Fe and inevitable impurity element, this corrosion-resistant stainless steel coffee pot material has stronger machining property, erosion resistance and germ resistance, CN201210456404.2 provides a kind of corrosion-and high-temp-resistant stainless steel band, and two surfaces up and down of described Stainless Steel Band and two sides have frie retardant coating layer, the thickness of described Stainless Steel Band is 4mm-6mm.Certain toughness should be had, in order to avoid ftracture when power by bending after the spraying of this frie retardant coating.The thickness of upper and lower two surperficial frie retardant coating layers is 2mm-5mm.It is 2mm-3mm that side frie retardant coating layer obtains thickness.This kind of high temperature resistant corrosion-and high-temp-resistant stainless steel band realizes by the method sprayed.Frie retardant coating generally has the function improving fire endurance, and be especially suitable for some hot environments, the Stainless Steel Band simultaneously scribbling this frie retardant coating can also be corrosion-resistant, can stop Stainless Steel Band Yin Gaowen and cause strength degradation.Although two patents improve stainless corrosion resistance nature, but life-time service, and its corrosion resistance nature can't meet the demand of some special dimensions, therefore, develops a kind of stainless steel with high-corrosion resistance, promise well.

Summary of the invention

The present invention is directed to prior art Problems existing, a kind of highly corrosion resistant stainless steel is provided, this stainless steel superior performance, there is superior corrosion resistance nature, can apply in a lot of fields, and its preparation method is simple, cost is lower, is suitable for the scale operation of industry.

In order to solve the problem, the technical solution adopted in the present invention is:

A kind of highly corrosion resistant stainless steel, the weight part of each component is:

Fe ₃o ₄35 ~ 40 parts, Fe ₂o ₃40 ~ 45 parts, CuO1 ~ 3 part, MgO3 ~ 7 part, SiO ₂5 ~ 8 parts, ZnO3 ~ 5 part, TiO ₂1 ~ 3 part;

Fe ₃o ₄35 ~ 37.5 parts, Fe ₂o ₃40 ~ 42.5 parts, CuO1 ~ 2 part, MgO6 ~ 7 part, SiO ₂6 ~ 8 parts, ZnO4 ~ 5 part, TiO ₂2 ~ 3 parts;

Fe ₃o ₄37.5 ~ 40 parts, Fe ₂o ₃42.5 ~ 45 parts, CuO2 ~ 3 part, MgO3 ~ 6 part, SiO ₂6 ~ 8 parts, ZnO4 ~ 5 part, TiO ₂2 ~ 3 parts;

Fe ₃o ₄36.5 ~ 38.5 parts, Fe ₂o ₃42.5 ~ 45 parts, CuO2 ~ 3 part, MgO3 ~ 6 part, SiO ₂5 ~ 6 parts, ZnO3 ~ 4 part, TiO ₂1 ~ 2 part;

Fe ₃o ₄36.5 parts, Fe ₂o ₃42.5 parts, CuO2 part, MgO3 part, SiO ₂5 parts, ZnO3 part, TiO ₂1 part;

Fe ₃o ₄38.5 parts, Fe ₂o ₃45 parts, CuO3 part, MgO6 part, SiO ₂6 parts, ZnO4 part, TiO ₂2 parts.

Another object of the present invention is to provide the stainless preparation method of a kind of highly corrosion resistant, comprises the following steps:

Described raw material is placed in ball mill grind, until ball-milled powder grain refining to 1 ~ 3nm; Sinter grinding the powder obtained, the condition of sintering is: sintering pressure is 45 ~ 50MPa, and sintering temperature is 1150 ~ 1200 DEG C, and heat-up rate is 100 ~ 120 DEG C/min, and the sintered heat insulating time is 20 ~ 25min; Reverse mould after sintering, freezing, obtain highly corrosion resistant stainless steel.

The present invention relative to the beneficial effect of prior art is:

A kind of highly corrosion resistant stainless steel provided by the invention, by strictly controlling the content of often kind of element, make product have superior wear resisting property, and over-all properties is good, can apply in a lot of fields, comprise some special dimensions.Meanwhile, its preparation method is simple, and cost is lower, is suitable for the scale operation of industry.

Embodiment

Be described in further details the present invention below by embodiment, these embodiments are only used for the present invention is described, do not limit the scope of the invention.

embodiment 1

A kind of highly corrosion resistant stainless steel, the weight part of each component is:

Fe ₃o ₄38.5 parts, Fe ₂o ₃45 parts, CuO3 part, MgO6 part, SiO ₂6 parts, ZnO4 part, TiO ₂2 parts.

Its preparation method, comprises the following steps:

Described raw material is placed in ball mill grind, until ball-milled powder grain refining is to 1nm; Sinter grinding the powder obtained, the condition of sintering is: sintering pressure is 45MPa, and sintering temperature is 1150 DEG C, and heat-up rate is 100 DEG C/min, and the sintered heat insulating time is 20min; Reverse mould after sintering, freezing, obtain highly corrosion resistant stainless steel.

embodiment 2

A kind of highly corrosion resistant stainless steel, the weight part of each component is:

Fe ₃o ₄36.5 parts, Fe ₂o ₃42.5 parts, CuO2 part, MgO3 part, SiO ₂5 parts, ZnO3 part, TiO ₂1 part.

Its preparation method, comprises the following steps:

Described raw material is placed in ball mill grind, until ball-milled powder grain refining is to 3nm; Sinter grinding the powder obtained, the condition of sintering is: sintering pressure is 50MPa, and sintering temperature is 1200 DEG C, and heat-up rate is 120 DEG C/min, and the sintered heat insulating time is 25min; Reverse mould after sintering, freezing, obtain highly corrosion resistant stainless steel.

embodiment 3

A kind of highly corrosion resistant stainless steel, the weight part of each component is:

Fe ₃o ₄37.5 parts, Fe ₂o ₃45 parts, CuO2 part, MgO6 part, SiO ₂8 parts, ZnO4 part, TiO ₂2 parts.

Its preparation method, comprises the following steps:

Described raw material is placed in ball mill grind, until ball-milled powder grain refining is to 2nm; Sinter grinding the powder obtained, the condition of sintering is: sintering pressure is 47.5MPa, and sintering temperature is 1170 DEG C, and heat-up rate is 110 DEG C/min, and the sintered heat insulating time is 23min; Reverse mould after sintering, freezing, obtain highly corrosion resistant stainless steel.

embodiment 4

A kind of highly corrosion resistant stainless steel, the weight part of each component is:

Fe ₃o ₄35 parts, Fe ₂o ₃40 parts, CuO1 part, MgO6 part, SiO ₂8 parts, ZnO5 part, TiO ₂3 parts.

Its preparation method, comprises the following steps:

Described raw material is placed in ball mill grind, until ball-milled powder grain refining is to 1.2nm; Sinter grinding the powder obtained, the condition of sintering is: sintering pressure is 46MPa, and sintering temperature is 1160 DEG C, and heat-up rate is 103 DEG C/min, and the sintered heat insulating time is 21min; Reverse mould after sintering, freezing, obtain highly corrosion resistant stainless steel.

embodiment 5

A kind of highly corrosion resistant stainless steel, the weight part of each component is:

Fe ₃o ₄40 parts, Fe ₂o ₃45 parts, CuO3 part, MgO7 part, SiO ₂8 parts, ZnO3 part, TiO ₂3 parts.

Its preparation method, comprises the following steps:

Described raw material is placed in ball mill grind, until ball-milled powder grain refining is to 2.8nm; Sinter grinding the powder obtained, the condition of sintering is: sintering pressure is 48MPa, and sintering temperature is 1190 DEG C, and heat-up rate is 115 DEG C/min, and the sintered heat insulating time is 24min; Reverse mould after sintering, freezing, obtain highly corrosion resistant stainless steel.

Claims (7)

1. a highly corrosion resistant stainless steel, is characterized in that: the weight part of each component is:

Fe ₃o ₄35 ~ 40 parts, Fe ₂o ₃40 ~ 45 parts, CuO1 ~ 3 part, MgO3 ~ 7 part, SiO ₂5 ~ 8 parts, ZnO3 ~ 5 part, TiO ₂1 ~ 3 part.

2. a highly corrosion resistant stainless steel, is characterized in that: the weight part of each component is:

Fe ₃o ₄35 ~ 37.5 parts, Fe ₂o ₃40 ~ 42.5 parts, CuO1 ~ 2 part, MgO6 ~ 7 part, SiO ₂6 ~ 8 parts, ZnO4 ~ 5 part, TiO ₂2 ~ 3 parts.

3. a highly corrosion resistant stainless steel, is characterized in that: the weight part of each component is:

Fe ₃o ₄37.5 ~ 40 parts, Fe ₂o ₃42.5 ~ 45 parts, CuO2 ~ 3 part, MgO3 ~ 6 part, SiO ₂6 ~ 8 parts, ZnO4 ~ 5 part, TiO ₂2 ~ 3 parts.

4. a highly corrosion resistant stainless steel, is characterized in that: the weight part of each component is:

Fe ₃o ₄36.5 ~ 38.5 parts, Fe ₂o ₃42.5 ~ 45 parts, CuO2 ~ 3 part, MgO3 ~ 6 part, SiO ₂5 ~ 6 parts, ZnO3 ~ 4 part, TiO ₂1 ~ 2 part.

5. a highly corrosion resistant stainless steel, is characterized in that: the weight part of each component is:

Fe ₃o ₄36.5 parts, Fe ₂o ₃42.5 parts, CuO2 part, MgO3 part, SiO ₂5 parts, ZnO3 part, TiO ₂1 part.

6. a highly corrosion resistant stainless steel, is characterized in that: the weight part of each component is:

Fe ₃o ₄38.5 parts, Fe ₂o ₃45 parts, CuO3 part, MgO6 part, SiO ₂6 parts, ZnO4 part, TiO ₂2 parts.

7., according to a kind of highly corrosion resistant stainless steel described in claim 1 ~ 6, it is characterized in that: its preparation method, comprise the following steps:

Described raw material is placed in ball mill grind, until ball-milled powder grain refining to 1 ~ 3nm; Sinter grinding the powder obtained, the condition of sintering is: sintering pressure is 45 ~ 50MPa, and sintering temperature is 1150 ~ 1200 DEG C, and heat-up rate is 100 ~ 120 DEG C/min, and the sintered heat insulating time is 20 ~ 25min; Reverse mould after sintering, freezing, obtain highly corrosion resistant stainless steel.