CN106811702B - A kind of magnetism-free stainless steel - Google Patents
A kind of magnetism-free stainless steel Download PDFInfo
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Abstract
The invention discloses a kind of novel magnetism-free stainless steels, the component of the novel magnetism-free stainless steel (following % indicates weight percent) count by weight percentage are as follows: carbon 0.13%-0.17%, nickel is 4%-7%, chromium is 9%-15%, manganese is 9%-11%, niobium is 0.58%-0.77%, vanadium is 0.13%-0.32%, molybdenum is 1.3%-1.8%, titanium 3%-4%, rare earth 0.23%-0.53%, silver is 0.056%-0.15%, copper is 0.5%-0.9%, and the total amount of p and s is no more than 0.035%, and surplus is iron and its inevitable impurity.There is the alloying element of sterilizing function by changing alloy proportion and addition, stainless steel is set to have the prerequisite of excellent in performance, then pass through optimization smelting process and heat treatment process, make stainless steel when having outstanding mechanical performance, sterilization, antibacterial function can also be had both, the difficult situation of existing antibacterial stainless steel is changed.
Description
Technical field
The present invention relates to a kind of alloy material, in particular to a kind of novel magnetism-free stainless steel.
Background technique
Currently, widely used nonmagnetic steel is 18-8 type austenitic stainless steels in domestic industry, the smelting of nonmagnetic steel and
Processing technology is very mature at home.But as performance requirement of the people to material is higher and higher, which is being used
Intensity and wearability are not able to satisfy the requirement of people more and more in the process, especially work in the presence of a harsh environment, corrosion resistance
It is significantly insufficient with wearability, it not only influences presentation quality, while the service life of the strong influence material, leads to corresponding cost
Increase, safety accident is easily sent out.Meanwhile in the vessel for loading of pieces, most of stainless steel capital do not have bacteria resistance function, and
Antibacterial stainless steel its performance to circulate on the market is but lower than general stainless steel, and people are past in antibacterial and mechanical performance choice
Toward the latter can be selected, antibacterial stainless steel is caused to cannot get people's approval.
Summary of the invention
Goal of the invention of the invention is: in view of the above problems, a kind of novel magnetism-free stainless steel is provided, by changing
Becoming alloy proportion and addition has the alloying element of sterilizing function, so that stainless steel is had the prerequisite of excellent in performance, then leads to
Optimization smelting process and heat treatment process are crossed, makes stainless steel when having outstanding mechanical performance, moreover it is possible to have both sterilization, suppression
The function of bacterium changes the difficult situation of existing antibacterial stainless steel.
The technical solution adopted by the invention is as follows: a kind of novel magnetism-free stainless steel, the component of the novel magnetism-free stainless steel
(following % indicates weight percent) count by weight percentage are as follows: carbon 0.13%-0.17%, nickel 4%-7%, chromium 9%-
15%, manganese 9%-11%, niobium 0.58%-0.77%, vanadium 0.13%-0.32%, molybdenum 1.3%-1.8%, titanium 3%-4%, rare earth are
0.23%-0.53%, silver are 0.056%-0.15%, and the total amount of copper 0.5%-0.9%, p and s are no more than 0.035%, and surplus is iron
And its inevitable impurity.
Further, (following % indicates weight percent to the component of the novel magnetism-free stainless steel count by weight percentage
Than) are as follows: carbon 0.15%, nickel 6%, chromium 13%, manganese 9%, niobium 0.62%, vanadium 0.28%, molybdenum 1.5%, titanium 3.7%,
Rare earth is 0.53%, and silver is 0.13%, copper 0.7%, and the total amount of p and s is no more than 0.035%, and surplus is for iron and its unavoidably
Impurity.
Further, the novel magnetism-free stainless steel is made by following steps:
Step 1, with medium-frequency induction furnace melting, raw material iron is put into heat in converter and is melted, is all melted to raw material iron
Afterwards, bath temperature is adjusted, makes bath temperature control at 1580 DEG C or so, decarburizer, desulfurizing agent, deoxidation is then added into molten bath
Agent carries out decarburization, desulfurization, deoxidation to the molten iron in molten bath；
After the completion of step 2, decarburization, desulfurization, deoxidation step, heat up bath temperature, makes up to 1600 DEG C or so, keeps
5min is continuously added to ferrochrome, manganese iron and Nickel particle, reaches the chromium content in molten bath, manganese content, nickel content then into molten bath
Pre-provisioning request adjusts temperature, makes temperature control at 1610 DEG C, keeps 5min；
After the completion of step 3, step 2, deoxidier is added and carries out secondary deoxidation, molybdenum-iron, ferro-niobium, vanadium iron and titanium are added later
Iron, at the end of melting is fast, be added rare earth, so that the alloying component in steel is reached pre-provisioning request, then finely tune molten steel in chemistry at
Point, preparing casting, casting method is wax-pattern casting, after having cast, finished to steel ingot molding, takes out steel ingot, clear up surface dregs,
Remove feeders；
Step 4, homogenizing annealing: after the completion of casting, in heat-treatment furnace, extremely by Heating Steel Ingots obtained in step 3
1200 DEG C, heating rate is 130 DEG C/h, then keeps the temperature 6h, then cool to room temperature with the furnace；
After the completion of step 5, homogenizing annealing, steel ingot is placed in heat-treatment furnace, heats steel ingot to 930 DEG C, keeps the temperature 3h, then
Cool to room temperature with the furnace；
After the completion of step 6, step 5, the method being machined into removes the casting flaw and oxide skin of surface of steel ingot, surface
It polishes smooth smooth；
Steel ingot after being machined is placed in heating furnace by step 7, and by Heating Steel Ingots to 1050 DEG C, heating rate is
90 DEG C/h, under primary forging and stamping, steel ingot is forged into the plate of required specification；
Plate after the completion of forging and stamping is placed in heat-treatment furnace by step 8, and heating plate is to 630 DEG C, heating rate 80
DEG C/h, 3h is then kept the temperature, then cool to room temperature with the furnace.
Further, the mode by the wire cutting of obtained plate is cut into the plate for facilitating storage and using, and is added with machinery
Obtained finished product at the finished product of required shape and size, is then carried out the sheet fabrication after wire cutting at solid solution by the mode of work
Finished product, i.e., be placed in heat-treatment furnace by reason, and for heating finished product to 1120 DEG C, heating rate is 100 DEG C/h, keeps the temperature 4h, then water again
It quenches to room temperature.
Further, it also needs for finished product to be heat-treated after the finished product solution treatment, i.e., sets the finished product after solution treatment
In heat-treatment furnace, 800 DEG C are heated to, heating rate is 70 DEG C/h, keeps the temperature 6h, then sky is cooled to room temperature.
The formula of antibacterial stainless steel of the invention is different as the essential element in the formula of existing anti-bacteria stainless steel
It is to change the component ratio of each element and be added to microelement, is on the one hand to improve the mechanical performance of stainless steel, it is another
Aspect enables stainless steel preferably to play antibacterial, sterilizing function, in terms of improving stainless steel corrosion resistance, is added in steel
Vanadium, titanium and niobium microelement, vanadium, titanium and niobium can form stable carbide in steel, can effectively avoid being settled out on crystal boundary
Chromium carbide leads to the intercrystalline corrosion of stainless steel, it is contemplated that the application of container for storing milk has added a great deal of in antibacterial stainless steel
Molybdenum, molybdenum can form stable passivating film in steel, improve the performance of steel acid and alkali-resistance, improve the ability of steel anti intercrystalline corrosion, this
A little alloying elements can also improve the comprehensive performances such as the intensity, hardness and wearability of steel；At antibacterial aspect, copper and silver have been that antibacterial is made
Essential element, copper, silver element are individually added into the anti-microbial property that can improve steel, and copper plays the premise of antibacterial action
It is that by high-temperature aging process, disperse educt ε-Cu mutually could generate antibacterial effect in the base, and improve Austria after copper content
The thermoplasticity of family name's body stainless steel declines, so plus the process costs of steel improve, hot-working character deteriorates, silver-colored Antibacterial Mechanism after copper
For silver ion destroys bacterium stereochemical structure, cause bacterial death, oxygen can also be catalyzed by silver in conjunction with cell membrane and memebrane protein
Active oxygen, active oxygen have sterilizing ability, studies have shown that silver-colored antibacterial ability is 100 times of copper, to reach the fungistatic effect of steel
Copper and silver, are then used cooperatively by the component ratio that original alloying element is changed to optimal, of the invention antibacterial stainless steel, allow steel
In copper timeliness formed ε-Cu phase after promote silver ion steel surface passivating film ride-through capability, formed composite antibacterial mechanism,
Steel is set to reach best fungistatic effect.Since the present invention is low-carbon alloy steel, therefore plasticity itself and toughness are fine, while in order to solve
The low disadvantage of mild steel hardness strength changes the alloy proportion of chromium, manganese, nickel and element silicon in steel, keeps these alloying elements mutual
Cooperation, to enhance the hardness and strength of steel, improves the quenching property of steel, improves the hot-working character of steel, make steel intensity with higher
And hardness
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are: by change alloy proportion and
The alloying element with sterilizing function is added, stainless steel is made to have the prerequisite of excellent in performance, then passes through optimization smelter
Skill and heat treatment process make stainless steel when having outstanding mechanical performance, moreover it is possible to have both sterilization, antibacterial function, change
Cash the difficult situation for having antibacterial stainless steel.
Specific embodiment
Below with reference to embodiment, the present invention is described in detail.
In order to make invention objects, technical solutions and advantages be more clearly understood, with reference to embodiments, to the present invention into
Row is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit
The fixed present invention.
Embodiment one
A kind of novel magnetism-free stainless steel, the component of the novel magnetism-free stainless steel (the following equal table of % count by weight percentage
Show weight percent) are as follows: carbon 0.15%, nickel 6%, chromium 13%, manganese 9%, niobium 0.62%, vanadium 0.28%, molybdenum 1.5%,
Titanium is 3.7%, rare earth 0.53%, and silver is 0.13%, copper 0.7%, and the total amounts of p and s is no more than 0.035%, surplus be iron and its
Inevitable impurity, the novel magnetism-free stainless steel are made by following steps:
Step 1, with medium-frequency induction furnace melting, raw material iron is put into heat in converter and is melted, is all melted to raw material iron
Afterwards, bath temperature is adjusted, makes bath temperature control at 1580 DEG C or so, decarburizer, desulfurizing agent, deoxidation is then added into molten bath
Agent carries out decarburization, desulfurization, deoxidation to the molten iron in molten bath；
After the completion of step 2, decarburization, desulfurization, deoxidation step, heat up bath temperature, makes up to 1600 DEG C or so, keeps
5min is continuously added to ferrochrome, manganese iron and Nickel particle, reaches the chromium content in molten bath, manganese content, nickel content then into molten bath
Pre-provisioning request adjusts temperature, makes temperature control at 1610 DEG C, keeps 5min；
After the completion of step 3, step 2, deoxidier is added and carries out secondary deoxidation, molybdenum-iron, ferro-niobium, vanadium iron and titanium are added later
Iron, at the end of melting is fast, be added rare earth, so that the alloying component in steel is reached pre-provisioning request, then finely tune molten steel in chemistry at
Point, preparing casting, casting method is wax-pattern casting, after having cast, finished to steel ingot molding, takes out steel ingot, clear up surface dregs,
Remove feeders；
Step 4, homogenizing annealing: after the completion of casting, in heat-treatment furnace, extremely by Heating Steel Ingots obtained in step 1
1200 DEG C, heating rate is 130 DEG C/h, then keeps the temperature 6h, then cool to room temperature with the furnace；
After the completion of step 5, homogenizing annealing, steel ingot is placed in heat-treatment furnace, heats steel ingot to 930 DEG C, keeps the temperature 3h, then
Cool to room temperature with the furnace；
After the completion of step 6, step 5, the method being machined into removes the casting flaw and oxide skin of surface of steel ingot, surface
It polishes smooth smooth；
Steel ingot after being machined is placed in heating furnace by step 7, and by Heating Steel Ingots to 1050 DEG C, heating rate is
90 DEG C/h, under primary forging and stamping, steel ingot is forged into the plate of required specification；
Plate after the completion of forging and stamping is placed in heat-treatment furnace by step 8, and heating plate is to 630 DEG C, heating rate 80
DEG C/h, 3h is then kept the temperature, then cool to room temperature with the furnace.
In the present embodiment, the mode of obtained plate wire cutting is cut into the plate for facilitating storage and using, used
Obtained finished product at the finished product of required shape and size, is then carried out the sheet fabrication after wire cutting by the mode of machining
Finished product is placed in heat-treatment furnace by solution treatment, for heating finished product to 1120 DEG C, heating rate is 100 DEG C/h, keeps the temperature 4h, so
Afterwards again water quenching to room temperature；It also needs for finished product to be heat-treated after the finished product solution treatment, i.e., sets the finished product after solution treatment
In heat-treatment furnace, 800 DEG C are heated to, heating rate is 70 DEG C/h, keeps the temperature 6h, then sky is cooled to room temperature.
Embodiment two
A kind of novel magnetism-free stainless steel, the component of the novel magnetism-free stainless steel (the following equal table of % count by weight percentage
Show weight percent) are as follows: carbon 0.18%, nickel 3.15%, chromium 8.71%, manganese 11.8%, silicon 4.80%, niobium 0.57%, vanadium
Be 0.23%, molybdenum 1.5%, titanium 3.56%, rare earth 0.31%, the total amounts of p and s is no more than 0.035%, surplus be iron and its
Inevitable impurity, the novel magnetism-free stainless steel are made by following steps:
Step 1, with medium-frequency induction furnace melting, raw material iron is put into heat in converter and is melted, is all melted to raw material iron
Afterwards, bath temperature is adjusted, makes bath temperature control at 1580 DEG C or so, decarburizer, desulfurizing agent, deoxidation is then added into molten bath
Agent carries out decarburization, desulfurization, deoxidation to the molten iron in molten bath；
After the completion of step 2, decarburization, desulfurization, deoxidation step, heat up bath temperature, makes up to 1600 DEG C or so, keeps
5min is continuously added to ferrochrome, manganese iron and Nickel particle, reaches the chromium content in molten bath, manganese content, nickel content then into molten bath
Pre-provisioning request adjusts temperature, makes temperature control at 1610 DEG C, keeps 5min；
After the completion of step 3, step 2, deoxidier is added and carries out secondary deoxidation, molybdenum-iron, ferro-niobium, vanadium iron and titanium are added later
Iron, at the end of melting is fast, be added rare earth, so that the alloying component in steel is reached pre-provisioning request, then finely tune molten steel in chemistry at
Point, preparing casting, casting method is wax-pattern casting, after having cast, finished to steel ingot molding, takes out steel ingot, clear up surface dregs,
Remove feeders；
Step 4, homogenizing annealing: after the completion of casting, in heat-treatment furnace, extremely by Heating Steel Ingots obtained in step 1
1200 DEG C, heating rate is 130 DEG C/h, then keeps the temperature 6h, then cool to room temperature with the furnace；
After the completion of step 5, homogenizing annealing, steel ingot is placed in heat-treatment furnace, heats steel ingot to 930 DEG C, keeps the temperature 3h, then
Cool to room temperature with the furnace；
After the completion of step 6, step 5, the method being machined into removes the casting flaw and oxide skin of surface of steel ingot, surface
It polishes smooth smooth；
Steel ingot after being machined is placed in heating furnace by step 7, and by Heating Steel Ingots to 1050 DEG C, heating rate is
90 DEG C/h, under primary forging and stamping, steel ingot is forged into the plate of required specification；
Plate after the completion of forging and stamping is placed in heat-treatment furnace by step 8, and heating plate is to 630 DEG C, heating rate 80
DEG C/h, 3h is then kept the temperature, then cool to room temperature with the furnace.
In the present embodiment, the mode of obtained plate wire cutting is cut into the plate for facilitating storage and using, used
Obtained finished product at the finished product of required shape and size, is then carried out the sheet fabrication after wire cutting by the mode of machining
Finished product is placed in heat-treatment furnace by solution treatment, for heating finished product to 1120 DEG C, heating rate is 100 DEG C/h, keeps the temperature 4h, so
Afterwards again water quenching to room temperature；It also needs for finished product to be heat-treated after the finished product solution treatment, i.e., sets the finished product after solution treatment
In heat-treatment furnace, 800 DEG C are heated to, heating rate is 70 DEG C/h, keeps the temperature 6h, then sky is cooled to room temperature.
Embodiment three
A kind of novel magnetism-free stainless steel, the component of the novel magnetism-free stainless steel (the following equal table of % count by weight percentage
Show weight percent) are as follows: carbon 0.21%, nickel 3%, chromium 13%, manganese 11%, silicon 5%, niobium 0.48%, vanadium 0.13%, molybdenum
It is 1.7%, titanium 4%, rare earth 0.27%, the total amounts of p and s is no more than 0.035%, and surplus is iron and its inevitably miscellaneous
Matter, the novel magnetism-free stainless steel are made by following steps:
Step 1, with medium-frequency induction furnace melting, raw material iron is put into heat in converter and is melted, is all melted to raw material iron
Afterwards, bath temperature is adjusted, makes bath temperature control at 1580 DEG C or so, decarburizer, desulfurizing agent, deoxidation is then added into molten bath
Agent carries out decarburization, desulfurization, deoxidation to the molten iron in molten bath；
After the completion of step 2, decarburization, desulfurization, deoxidation step, heat up bath temperature, makes up to 1600 DEG C or so, keeps
5min is continuously added to ferrochrome, manganese iron and Nickel particle, reaches the chromium content in molten bath, manganese content, nickel content then into molten bath
Pre-provisioning request adjusts temperature, makes temperature control at 1610 DEG C, keeps 5min；
After the completion of step 3, step 2, deoxidier is added and carries out secondary deoxidation, molybdenum-iron, ferro-niobium, vanadium iron and titanium are added later
Iron, at the end of melting is fast, be added rare earth, so that the alloying component in steel is reached pre-provisioning request, then finely tune molten steel in chemistry at
Point, preparing casting, casting method is wax-pattern casting, after having cast, finished to steel ingot molding, takes out steel ingot, clear up surface dregs,
Remove feeders；
Step 4, homogenizing annealing: after the completion of casting, in heat-treatment furnace, extremely by Heating Steel Ingots obtained in step 1
1200 DEG C, heating rate is 130 DEG C/h, then keeps the temperature 6h, then cool to room temperature with the furnace；
After the completion of step 5, homogenizing annealing, steel ingot is placed in heat-treatment furnace, heats steel ingot to 930 DEG C, keeps the temperature 3h, then
Cool to room temperature with the furnace；
After the completion of step 6, step 5, the method being machined into removes the casting flaw and oxide skin of surface of steel ingot, surface
It polishes smooth smooth；
Steel ingot after being machined is placed in heating furnace by step 7, and by Heating Steel Ingots to 1050 DEG C, heating rate is
90 DEG C/h, under primary forging and stamping, steel ingot is forged into the plate of required specification；
Plate after the completion of forging and stamping is placed in heat-treatment furnace by step 8, and heating plate is to 630 DEG C, heating rate 80
DEG C/h, 3h is then kept the temperature, then cool to room temperature with the furnace.
In the present embodiment, the mode of obtained plate wire cutting is cut into the plate for facilitating storage and using, used
Obtained finished product at the finished product of required shape and size, is then carried out the sheet fabrication after wire cutting by the mode of machining
Finished product is placed in heat-treatment furnace by solution treatment, for heating finished product to 1120 DEG C, heating rate is 100 DEG C/h, keeps the temperature 4h, so
Afterwards again water quenching to room temperature；It also needs for finished product to be heat-treated after the finished product solution treatment, i.e., sets the finished product after solution treatment
In heat-treatment furnace, 800 DEG C are heated to, heating rate is 70 DEG C/h, keeps the temperature 6h, then sky is cooled to room temperature.
Example IV
A kind of novel magnetism-free stainless steel, the component of the novel magnetism-free stainless steel (the following equal table of % count by weight percentage
Show weight percent) are as follows: carbon 0.21%, nickel 5%, chromium 13%, manganese 8%, silicon 4%, niobium 0.48%, vanadium 0.13%, molybdenum are
1.7%, titanium 4%, rare earth 0.33%, the total amounts of p and s is no more than 0.035%, and surplus is iron and its inevitable impurity,
The novel magnetism-free stainless steel is made by following steps:
Step 1, with medium-frequency induction furnace melting, raw material iron is put into heat in converter and is melted, is all melted to raw material iron
Afterwards, bath temperature is adjusted, makes bath temperature control at 1580 DEG C or so, decarburizer, desulfurizing agent, deoxidation is then added into molten bath
Agent carries out decarburization, desulfurization, deoxidation to the molten iron in molten bath；
After the completion of step 2, decarburization, desulfurization, deoxidation step, heat up bath temperature, makes up to 1600 DEG C or so, keeps
5min is continuously added to ferrochrome, manganese iron and Nickel particle, reaches the chromium content in molten bath, manganese content, nickel content then into molten bath
Pre-provisioning request adjusts temperature, makes temperature control at 1610 DEG C, keeps 5min；
After the completion of step 3, step 2, deoxidier is added and carries out secondary deoxidation, molybdenum-iron, ferro-niobium, vanadium iron and titanium are added later
Iron, at the end of melting is fast, be added rare earth, so that the alloying component in steel is reached pre-provisioning request, then finely tune molten steel in chemistry at
Point, preparing casting, casting method is wax-pattern casting, after having cast, finished to steel ingot molding, takes out steel ingot, clear up surface dregs,
Remove feeders；
Step 4, homogenizing annealing: after the completion of casting, in heat-treatment furnace, extremely by Heating Steel Ingots obtained in step 1
1200 DEG C, heating rate is 130 DEG C/h, then keeps the temperature 6h, then cool to room temperature with the furnace；
After the completion of step 5, homogenizing annealing, steel ingot is placed in heat-treatment furnace, heats steel ingot to 930 DEG C, keeps the temperature 3h, then
Cool to room temperature with the furnace；
After the completion of step 6, step 5, the method being machined into removes the casting flaw and oxide skin of surface of steel ingot, surface
It polishes smooth smooth；
Steel ingot after being machined is placed in heating furnace by step 7, and by Heating Steel Ingots to 1050 DEG C, heating rate is
90 DEG C/h, under primary forging and stamping, steel ingot is forged into the plate of required specification；
Plate after the completion of forging and stamping is placed in heat-treatment furnace by step 8, and heating plate is to 630 DEG C, heating rate 80
DEG C/h, 3h is then kept the temperature, then cool to room temperature with the furnace.
In the present embodiment, the mode of obtained plate wire cutting is cut into the plate for facilitating storage and using, used
Obtained finished product at the finished product of required shape and size, is then carried out the sheet fabrication after wire cutting by the mode of machining
Finished product is placed in heat-treatment furnace by solution treatment, for heating finished product to 1120 DEG C, heating rate is 100 DEG C/h, keeps the temperature 4h, so
Afterwards again water quenching to room temperature；It also needs for finished product to be heat-treated after the finished product solution treatment, i.e., sets the finished product after solution treatment
In heat-treatment furnace, 800 DEG C are heated to, heating rate is 70 DEG C/h, keeps the temperature 6h, then sky is cooled to room temperature.
A sample will be respectively taken to carry out Mechanics Performance Testing in finished product that the various embodiments described above obtain, as a result as shown in the table:
At room temperature, the sample for the finished product that the various embodiments described above obtain after heat treatment is processed into straight sample,
Then it is uniformly bent 180 degree on mold, after unloading force, takes out sample, measure the elastic recoil angle Θ of samplee, then will become
650 DEG C of recovery annealings of sample after shape, measurement memory recovery angle Θm, sample predeformation amount ε, shape recovery rate η can reply change
Shape amount εr, it is plastically deformed εp, obtain following table:
Available by comparing two tables, the big shape memory effect of the difference of yield strength and tensile strength is all right
Rule, and elongation percentage determines the processability of alloy, elongation percentage is higher, and machinability is better, therefore novel nothing of the invention
Magnetic stainless steel, by changing alloying component and addition new component, substantially changes steel on the basis of original magnetism-free stainless steel
Mechanical performance, meanwhile, by change preparation process, control technical process in parameter obtained to change the structure organization of steel
The steel properties arrived are good, and corrosion resistance is strong.Meanwhile in order to test its degerming, fungistatic effect, will be obtained in each embodiment
Finished product sample is made, by JIS Z2801-2000 antibacterial fabricated product-test method of antibacterial performance and antibacterial effect standard
It is tested, as a result: Escherichia coli antibiotic rate is not less than 99%, and staphylococcus aureus antibiotic rate is not less than 99%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (5)
1. a kind of magnetism-free stainless steel, which is characterized in that the component of the magnetism-free stainless steel is count by weight percentage are as follows: carbon is
0.13%-0.17%, nickel 4%-7%, chromium 9%-15%, manganese 9%-11%, niobium 0.58%-0.77%, vanadium 0.13%-0.32%,
Molybdenum is 1.3%-1.8%, titanium 3%-4%, rare earth 0.23%-0.53%, and silver is 0.056%-0.15%, copper 0.5%-0.9%, phosphorus and
The total amount of sulphur is no more than 0.035%, and surplus is iron and its inevitable impurity.
2. magnetism-free stainless steel as described in claim 1, which is characterized in that the component of the magnetism-free stainless steel is by weight percentage
It calculates are as follows: carbon 0.15%, nickel 6%, chromium 13%, manganese 9%, niobium 0.62%, vanadium 0.28%, molybdenum 1.5%, titanium 3.7%,
Rare earth is 0.53%, and silver is 0.13%, copper 0.7%, and the total amount of p and s is no more than 0.035%, and surplus is for iron and its unavoidably
Impurity.
3. magnetism-free stainless steel as claimed in claim 2, which is characterized in that the magnetism-free stainless steel is made by following steps:
Step 1, with medium-frequency induction furnace melting, raw material iron is put into heat in converter and is melted, after raw material iron all fusing, is adjusted
Bath temperature is saved, makes bath temperature control at 1580 DEG C, decarburizer, desulfurizing agent, deoxidier, to molten bath is then added into molten bath
In molten iron carry out decarburization, desulfurization, deoxidation；
After the completion of step 2, decarburization, desulfurization, deoxidation step, heat up bath temperature, makes up to 1600 DEG C, keeps 5min, then
Into molten bath, it is continuously added to ferrochrome, manganese iron and Nickel particle, the chromium content in molten bath, manganese content, nickel content is made to reach pre-provisioning request,
Temperature is adjusted, makes temperature control at 1610 DEG C, keeps 5min；
After the completion of step 3, step 2, deoxidier is added and carries out secondary deoxidation, molybdenum-iron, ferro-niobium, vanadium iron and ferrotianium are added later, melts
At the end of refining is fast, rare earth is added, the alloying component in steel is made to reach pre-provisioning request, then finely tunes the chemical component in molten steel, it is quasi-
Standby casting, casting method is wax-pattern casting, after having cast, finishes to steel ingot molding, takes out steel ingot, clears up surface dregs, removal
Riser；
Step 4, homogenizing annealing: after the completion of casting, in heat-treatment furnace, by Heating Steel Ingots obtained in step 3 to 1200 DEG C,
Heating rate is 130 DEG C/h, then keeps the temperature 6h, then cool to room temperature with the furnace；
After the completion of step 5, homogenizing annealing, steel ingot is placed in heat-treatment furnace, steel ingot is heated and keeps the temperature 3h to 930 DEG C, then with furnace
It is cooled to room temperature；
After the completion of step 6, step 5, the method being machined into removes the casting flaw and oxide skin of surface of steel ingot, surface polishing
It is smooth；
Steel ingot after being machined is placed in heating furnace by step 7, by Heating Steel Ingots to 1050 DEG C, heating rate is 90 DEG C/
Steel ingot is forged into the plate of required specification under primary forging and stamping by h；
Plate after the completion of forging and stamping is placed in heat-treatment furnace by step 8, and for heating plate to 630 DEG C, heating rate is 80 DEG C/h,
Then 3h is kept the temperature, then cools to room temperature with the furnace.
4. magnetism-free stainless steel as claimed in claim 3, which is characterized in that the mode of obtained plate wire cutting to be cut into
The plate for facilitating storage and using, the mode being machined by the sheet fabrication after wire cutting at required shape and size at
Then obtained finished product is carried out solution treatment, i.e., finished product is placed in heat-treatment furnace by product, heat finished product to 1120 DEG C, heat up
Rate is 100 DEG C/h, keeps the temperature 4h, then again water quenching to room temperature.
5. magnetism-free stainless steel as claimed in claim 4, which is characterized in that also need to carry out finished product after the finished product solution treatment
Finished product after solution treatment, i.e., be placed in heat-treatment furnace by heat treatment, is heated to 800 DEG C, heating rate is 70 DEG C/h, heat preservation
6h, then sky is cooled to room temperature.
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| CN107937836B (en) * | 2017-12-06 | 2019-08-09 | 成都创客之家科技有限公司 | A kind of stainless steel material and preparation method thereof with shape memory function |
| CN108004484B (en) * | 2017-12-06 | 2019-09-10 | 新日鑫金属材料（深圳）有限公司 | A kind of preparation method of the stainless steel material with shape memory function |
| CN109112431B (en) * | 2018-10-10 | 2022-09-09 | 温州市安硕新材料有限公司 | Nonmagnetic stainless steel cold-rolled sheet for deep drawing forming and preparation method thereof |
| CN110541121A (en) * | 2019-10-17 | 2019-12-06 | 惠州濠特金属科技有限公司 | Non-magnetic steel and processing method thereof |
| CN113913647A (en) * | 2021-09-18 | 2022-01-11 | 温州瑞银不锈钢制造有限公司 | Low-carbon nickel-chromium-molybdenum-niobium alloy material, welding rod and preparation method of welding rod |
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