CN111618120A - Production method for improving strength of 316L stainless steel bar - Google Patents
Production method for improving strength of 316L stainless steel bar Download PDFInfo
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- CN111618120A CN111618120A CN202010437883.8A CN202010437883A CN111618120A CN 111618120 A CN111618120 A CN 111618120A CN 202010437883 A CN202010437883 A CN 202010437883A CN 111618120 A CN111618120 A CN 111618120A
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- stainless steel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
Abstract
The invention relates to a production method for improving the strength of 316L stainless steel bars, which comprises the following steps: firstly, customizing 316L stainless steel materials with specific component proportions; the stainless steel coiled material is put on a sand blasting drawing production line, the wire subjected to sand blasting rust removal enters a first drawing machine to be drawn for the first time, and the surface reduction rate of the first drawing is 25-30%; then the leather membrane is processed, and then the second drawing is carried out by adopting a polycrystalline die hole, wherein the reduction rate is 10-15%, and the total reduction rate of the two times of drawing is more than or equal to 40%. The production method of the invention firstly adopts or customizes the 316L stainless steel material with specific proportion, and the total reduction rate reaches more than 40 percent by twice drawing way of first large reduction rate and then small reduction rate, and the secondary drawing can improve the comprehensive strength of the bar material by more than 30 percent compared with the common process; and the second drawing adopts a polycrystalline die hole, and after the film treatment is carried out before the drawing, the wire can absorb more lubricating oil, the drawing is smoother, and the die damage and the product surface scratch are reduced.
Description
The technical field is as follows:
the invention relates to the technical field of metal material processing, in particular to a production method for improving the strength of 316L stainless steel bars.
Background art:
316L stainless steel is a common widely used stainless steel material, and generally, the stainless steel bar is produced with high efficiency by adopting a drawing production process. However, the common production process generally only comprises the steps of uncoiling, pre-straightening, sand blasting and rust removing, drawing, cutting, fine straightening, chamfering and the like, and 316L stainless steel bars produced by the common method hardly reach higher standards in product hardness and cannot meet special requirements in occasions, and the problems of mold damage, surface scratch and the like easily occur in the drawing process of the existing process.
The invention content is as follows:
the invention aims to overcome the defects of the existing products and provides a production method for improving the strength of 316L stainless steel bars.
The technical scheme adopted by the invention is as follows: a production method for improving the strength of a 316L stainless steel bar comprises the following steps:
firstly, customizing 316L stainless steel material with specific component proportion, wherein the component proportion in the 316L stainless steel material is as follows: c: 0.02% -0.025%, Si: 0.5% -0.7%, Mn: 0.8% -1%, P: 0.040% -0.042%, S: 0.01% -0.02%, Ni: 13.3% -13.5%, Cr: 16.8% -17.0%, Mo: 2.2% -2.3%, the rest is Le; producing 316L stainless steel coiled material according to the proportion of the components;
putting a stainless steel coiled material on a sand blasting drawing production line, placing the stainless steel coiled material on a material tray for uncoiling, primarily straightening the stainless steel coiled material by a traction and pre-straightening machine, and then sending the stainless steel coiled material into an automatic shot blasting machine for sand blasting and rust removing;
the wire subjected to sand blasting and rust removing treatment enters a first drawing machine to be drawn for the first time, and the reduction ratio of the first drawing (namely the difference between the cross section area of the wire before drawing and the cross section area of the wire after drawing is divided by the cross section area of the wire before drawing is 100%) is 25% -30%;
enabling the surface of the wire rod subjected to primary drawing to be soaked with a coating agent through a container filled with the coating agent, drying the wire rod through a dryer, forming a layer of compact porous membrane on the surface of the wire rod, then enabling the wire rod to enter a second drawing machine for secondary drawing, wherein the second drawing machine adopts a polycrystalline die hole, the reduction ratio of the secondary drawing relative to the reduction ratio before drawing is 10% -15%, and the total reduction ratio of the two times of drawing is more than or equal to 40%;
and after the second drawing is finished, cutting off the steel wire by a fixed-length cutting machine, performing secondary straightening by a high-precision straightening machine, and finally chamfering by a chamfering machine to obtain a finished product.
In the production method, the coating agent adopts one or more of sodium chloride, lime or anhydrous sodium sulphate as the components.
The production method of the invention firstly adopts or customizes 316L stainless steel material with specific proportion, and the total reduction rate reaches more than 40 percent by twice drawing way of first large reduction rate and then small reduction rate, and the secondary drawing can improve the comprehensive strength of the bar material by more than 10 percent compared with the common process; and the second drawing adopts a polycrystalline die hole, and after the film treatment is carried out before the drawing, the wire can absorb more lubricating oil, the drawing is smoother, the die damage and the surface scratch of the product are reduced, and the product quality is further improved.
The specific implementation mode is as follows:
the present invention is further illustrated by the following specific examples.
The first embodiment is as follows:
firstly, customizing 316L stainless steel material with specific component proportion, wherein the component proportion in the 316L stainless steel material is as follows: c: 0.02%, Si: 0.5, Mn: 0.8%, P: 0.040%, S: 0.01%, Ni: 13.3%, Cr: 16.8%, Mo: 2.2 percent and the rest is Le; producing 316L stainless steel coiled material according to the proportion of the components;
putting a stainless steel coiled material on a sand blasting drawing production line, placing the stainless steel coiled material on a material tray for uncoiling, primarily straightening the stainless steel coiled material by a traction and pre-straightening machine, and then sending the stainless steel coiled material into an automatic shot blasting machine for sand blasting and rust removing; the preliminary straightening and the sand blasting rust removal treatment are equivalent to the conventional process, so the details are not repeated;
the wire subjected to sand blasting and rust removing treatment enters a first drawing machine to be drawn for the first time, and the reduction ratio of the drawing for the first time is 25 percent;
enabling the surface of the wire rod subjected to the first drawing to be soaked with a coating agent through a container filled with the coating agent, wherein the coating agent is a sodium chloride and lime mixture solution, drying the coating agent through a dryer to form a layer of dense porous membrane on the surface of the wire rod, then enabling the wire rod to enter a second drawing machine for second drawing, wherein the second drawing machine adopts a polycrystalline die hole, the reduction ratio of the second drawing relative to the reduction ratio before drawing is 15%, and the total reduction ratio of the two times of drawing is 40%;
and after the second drawing is finished, cutting off the steel wire by a fixed-length cutting machine, performing secondary straightening by a high-precision straightening machine, and finally chamfering by a chamfering machine to obtain a finished product.
Example two:
firstly, customizing 316L stainless steel material with specific component proportion, wherein the component proportion in the 316L stainless steel material is as follows: c: 0.024%, Si: 0.6%, Mn: 0.9%, P: 0.041%, S: 0.015%, Ni: 13.4%, Cr: 16.9%, Mo: 2.25 percent and the balance Le; producing 316L stainless steel coiled material according to the proportion of the components;
putting a stainless steel coiled material on a sand blasting drawing production line, placing the stainless steel coiled material on a material tray for uncoiling, primarily straightening the stainless steel coiled material by a traction and pre-straightening machine, and then sending the stainless steel coiled material into an automatic shot blasting machine for sand blasting and rust removing; the preliminary straightening and the sand blasting rust removal treatment are equivalent to the conventional process, so the details are not repeated;
the wire subjected to sand blasting and rust removing treatment enters a first drawing machine to be drawn for the first time, and the reduction ratio of the drawing for the first time is 28 percent;
enabling the surface of the wire rod subjected to the first drawing to be soaked with a coating agent through a container filled with the coating agent, wherein the coating agent adopts a anhydrous sodium sulphate solution as a component, forming a layer of compact porous membrane on the surface of the wire rod after drying through a dryer, then enabling the wire rod to enter a second drawing machine for second drawing, wherein the second drawing machine adopts a polycrystalline die hole, the reduction ratio of the second drawing relative to the reduction ratio before drawing is 13%, and the total reduction ratio of the two times of drawing is 41%;
and after the second drawing is finished, cutting off the steel wire by a fixed-length cutting machine, performing secondary straightening by a high-precision straightening machine, and finally chamfering by a chamfering machine to obtain a finished product.
Example three:
firstly, customizing 316L stainless steel material with specific component proportion, wherein the component proportion in the 316L stainless steel material is as follows: c: 0.025%, Si: 0.7%, Mn: 1%, P: 0.042%, S: 0.02%, Ni: 13.5%, Cr: 17.0%, Mo: 2.3 percent and the rest is Le; producing 316L stainless steel coiled material according to the proportion of the components;
putting a stainless steel coiled material on a sand blasting drawing production line, placing the stainless steel coiled material on a material tray for uncoiling, primarily straightening the stainless steel coiled material by a traction and pre-straightening machine, and then sending the stainless steel coiled material into an automatic shot blasting machine for sand blasting and rust removing; the preliminary straightening and the sand blasting rust removal treatment are equivalent to the conventional process, so the details are not repeated;
the wire subjected to sand blasting and rust removing treatment enters a first drawing machine to be drawn for the first time, and the reduction rate of the drawing for the first time is 30 percent;
enabling the surface of the wire rod subjected to the first drawing to be soaked with a coating agent through a container filled with the coating agent, wherein the coating agent is anhydrous sodium sulphate solution, drying the wire rod through a dryer to form a layer of compact porous membrane on the surface of the wire rod, then enabling the wire rod to enter a second drawing machine to carry out second drawing, wherein the second drawing machine adopts a polycrystalline die hole, the reduction ratio of the second drawing relative to the reduction ratio before drawing is 10%, and the total reduction ratio of the two times of drawing is 40%;
and after the second drawing is finished, cutting off the steel wire by a fixed-length cutting machine, performing secondary straightening by a high-precision straightening machine, and finally chamfering by a chamfering machine to obtain a finished product.
As can be seen from the above table, the comprehensive strength of the 316L stainless steel bar produced by the process of the invention is improved by more than 10% compared with the 316L stainless steel bar produced by the traditional process.
The production method of the invention firstly adopts or customizes 316L stainless steel material with specific proportion, and the total reduction rate reaches more than 40 percent by twice drawing way of first large reduction rate and then small reduction rate, and the secondary drawing can improve the comprehensive strength of the bar material by more than 10 percent compared with the common process; and the second drawing adopts a polycrystalline die hole, and after the film treatment is carried out before the drawing, the wire can absorb more lubricating oil, the drawing is smoother, the die damage and the surface scratch of the product are reduced, and the product quality is further improved.
Claims (2)
1. A production method for improving the strength of 316L stainless steel bars is characterized by comprising the following steps: the production method comprises the following steps:
firstly, customizing 316L stainless steel material with specific component proportion, wherein the component proportion in the 316L stainless steel material is as follows: c: 0.02% -0.025%, Si: 0.5% -0.7%, Mn: 0.8% -1%, P: 0.040% -0.042%, S: 0.01% -0.02%, Ni: 13.3% -13.5%, Cr: 16.8% -17.0%, Mo: 2.2% -2.3%, the rest is Le; producing 316L stainless steel coiled material according to the proportion of the components;
putting a stainless steel coiled material on a sand blasting drawing production line, placing the stainless steel coiled material on a material tray for uncoiling, primarily straightening the stainless steel coiled material by a traction and pre-straightening machine, and then sending the stainless steel coiled material into an automatic shot blasting machine for sand blasting and rust removing;
the wire subjected to sand blasting and rust removing treatment enters a first drawing machine to be drawn for the first time, and the reduction ratio of the first drawing (namely the difference between the cross section area of the wire before drawing and the cross section area of the wire after drawing is divided by the cross section area of the wire before drawing is 100%) is 25% -30%;
enabling the surface of the wire rod subjected to primary drawing to be soaked with a coating agent through a container filled with the coating agent, drying the wire rod through a dryer, forming a layer of compact porous membrane on the surface of the wire rod, then enabling the wire rod to enter a second drawing machine for secondary drawing, wherein the second drawing machine adopts a polycrystalline die hole, the reduction ratio of the secondary drawing relative to the reduction ratio before drawing is 10% -15%, and the total reduction ratio of the two times of drawing is more than or equal to 40%;
and after the second drawing is finished, cutting off the steel wire by a fixed-length cutting machine, performing secondary straightening by a high-precision straightening machine, and finally chamfering by a chamfering machine to obtain a finished product.
2. The production method for improving the strength of 316L stainless steel bars according to claim 1, characterized in that: in the production method, the coating agent adopts one or more of sodium chloride, lime or anhydrous sodium sulphate as the components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010437883.8A CN111618120A (en) | 2020-05-21 | 2020-05-21 | Production method for improving strength of 316L stainless steel bar |
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| CN202010437883.8A CN111618120A (en) | 2020-05-21 | 2020-05-21 | Production method for improving strength of 316L stainless steel bar |
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| CN111618120A true CN111618120A (en) | 2020-09-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113198860A (en) * | 2021-04-23 | 2021-08-03 | 江阴市圣曼不锈钢线棒品有限公司 | Wire drawing process of stainless steel wire for spectacle frame |
| CN114632836A (en) * | 2022-03-09 | 2022-06-17 | 攀枝花普锐升金属材料有限公司 | Film pressing method for titanium (IV) and titanium alloy wire for cold-heading fastener |
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Cited By (3)
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| CN114632836A (en) * | 2022-03-09 | 2022-06-17 | 攀枝花普锐升金属材料有限公司 | Film pressing method for titanium (IV) and titanium alloy wire for cold-heading fastener |
| CN114632836B (en) * | 2022-03-09 | 2024-03-22 | 攀枝花普锐升金属材料有限公司 | Titanium and titanium alloy wire film pressing method for cold heading fastener |
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Application publication date: 20200904 |