CN111549291A - Killed steel for elevator guide rail and preparation method thereof - Google Patents
Killed steel for elevator guide rail and preparation method thereof Download PDFInfo
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- CN111549291A CN111549291A CN202010571959.6A CN202010571959A CN111549291A CN 111549291 A CN111549291 A CN 111549291A CN 202010571959 A CN202010571959 A CN 202010571959A CN 111549291 A CN111549291 A CN 111549291A
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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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
-
- 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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
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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
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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
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
The invention relates to the technical field of elevator guide rails, in particular to killed steel for an elevator guide rail and a preparation method thereof. The invention provides a sedative steel for an elevator guide rail, which comprises the following components in percentage by mass: 4.5-5.5 wt.% of silicon, 0.5-1.5 wt.% of copper, 0.4-0.6 wt.% of lanthanum, 0.3-1.0 wt.% of neodymium, 0.5-0.7 wt.% of yttrium, 0.8-1.2 wt.% of ytterbium, 0.7-0.9 wt.% of samarium, 0.3-0.6 wt.% of cobalt, 0.9-1.2 wt.% of boron, and the balance of iron. The crystal phase improver provided by the invention can permeate into crystal grains to make up pores between the crystal grains and particle cementite, so that the cracking of an elevator guide rail material is microscopically reduced, and the fatigue resistance of the elevator guide rail is further improved.
Description
Technical Field
The invention relates to the technical field of elevator guide rails, in particular to killed steel for an elevator guide rail and a preparation method thereof.
Background
At present, vertically-lifting elevators and escalators are the mainstream varieties in the elevator industry, wherein the vertically-lifting elevators account for about 80% of the total amount of the existing elevators, so that the vertically-lifting elevators become an important product which is closely related to the life of people, and the quality condition of the vertically-lifting elevators is also closely related to the lives and properties of people. In which the elevator guide rails, as an important part of the quality control of a vertical lift elevator, will directly affect the safety and comfort of the elevator. The elevator guide rails are two or more rows of vertical or inclined rigid rails arranged in an elevator shaft or between floors, so that the elevator car and the counterweight can move up and down along the elevator guide rails, and the quality of the elevator guide rails is directly related to the safety and the running quality of the elevator.
The guide rail tensile strength among the prior art is low, and this fatigue resistance that leads to the guide rail descends, and fatigue fracture's production and extension are with higher speed, especially near inner wall and galvanizing coat below and inner wall R angle department at the guide rail, often there is folding type defect, and this type of defect will become stress concentration district emergence microcrack under the stress action, under the effect of alternating load, starts fatigue fracture to expand from inside to outside, finally lead to the guide rail to take place early fatigue fracture's phenomenon.
In view of the defects of the conventional elevator guide rail, the inventor of the invention actively researches and innovates based on practical experience and professional knowledge which are abundant for many years in the design and manufacture of the products and by matching with the application of theories so as to create the sedative steel for the elevator guide rail and the preparation method thereof, so that the anti-cracking performance of the elevator guide rail is improved and the elevator guide rail is more practical. After continuous research and design and repeated trial production and improvement, the invention with practical value is finally created.
Disclosure of Invention
The invention aims to provide the killed steel for the elevator guide rail, which has few pores, long-range order of crystal grain arrangement, prevention of early cracking and industrial value.
The technical purpose of the invention is realized by the following technical scheme:
the invention provides a killed steel for elevator guide rails, which comprises the following components in percentage by mass: 4.5-5.5 wt.% of silicon, 0.5-1.5 wt.% of copper, 0.4-0.6 wt.% of lanthanum, 0.3-1.0 wt.% of neodymium, 0.5-0.7 wt.% of yttrium, 0.8-1.2 wt.% of ytterbium, 0.7-0.9 wt.% of samarium, 0.3-0.6 wt.% of cobalt, 0.9-1.2 wt.% of boron, and the balance of iron. The invention utilizes the oxygen vacancy which is generated when the killed steel is annealed to lead O2-Deflecting oxygen vacancies away from Fe3+Thereby forming a stable ferrite structure, Y provided by the invention3+Substituted for Fe3+The crystal lattice has defects, and a large number of defects cause the phonon mode to be changed, so that the crystal grains in the metallographic phase are rearranged, the structural stability and compactness are improved, and the anti-cracking capability of the killed steel is improved; in addition, association defects can be introduced during Yb doping, on one hand, the defect association among Yb, Y and oxygen defects can enable the crystal to be more stable, and the doping elements are not easy to run off from the crystal; on the other hand, even if doping element loss exists in long-term service, Yb with small defect association energy is easy to lose, so that Y is ensured to be retained in the crystal, the stability of the metal internal structure is improved, and the service life of the killed steel is prolonged.
Further, neodymium and boron form neodymium-iron-boron magnetic crystals inside the killed steel. The neodymium iron boron magnetic crystal is a non-oriented crystal, and the tetragonal crystal can be interpenetrated with other crystal phases in the killed steel, so that the metal metallographic phase is rearranged while the mechanical strength of the metal is improved, and the mechanical strength and the fatigue resistance of the metal are improved.
Further, samarium-cobalt-iron-boron magnetic crystals are formed inside the killed steel. The magnetic fields of the samarium cobalt iron boron magnetic crystal and the iron neodymium boron magnetic crystal are mutually influenced and closely adsorbed together, so that the compactness in the metal is improved, a synergistic effect is formed, and the mechanical strength and the fatigue resistance of the killed steel are further improved.
Furthermore, the internal crystal phase of the killed steel is improved by using a crystal phase improving agent in the preparation process. In the carburizing process of the killed steel, a ferrirubin-particle cementite is formed, and the particle cementite is distributed along the interface of crystal grains to cause the cracking of a guide rail material, so that the fatigue resistance of the elevator guide rail is reduced, and the safety of the elevator guide rail is influenced. The crystal phase improver provided by the invention can permeate into crystal grains to make up pores between the crystal grains and particle cementite, so that the cracking of an elevator guide rail material is microscopically reduced, and the fatigue resistance of the elevator guide rail is improved.
Further, the crystal phase improver is any one of methyl isobutyl carbinol, ethionamide and sodium butyl xanthate. After penetrating into the interior of a metallographic phase, the butyl xanthic acid forms a coordination metal compound with metals such as iron, cobalt and the like, and after alloying, the growth positions of crystals in the metals are rearranged, so that the compactness of the metals is improved, and the generation of pores in the alloying process is reduced, thereby further improving the fatigue resistance of the metals.
The second purpose of the invention is to provide a preparation method of the killed steel for the elevator guide rail, which has the same purpose.
The technical purpose of the invention is realized by the following technical scheme:
a preparation method of killed steel for elevator guide rails comprises hot rolling, cold rolling, hot galvanizing and alloying.
Further, in the hot rolling process, the heating temperature is 1100-1300 ℃, the finishing temperature is 750-850 ℃, and the coiling temperature is 680-720 ℃. The hot rolling temperature is 1100-1300 ℃, the neodymium iron boron magnetic crystal can be sintered, the neodymium iron boron magnetic crystal is sintered in inert gas or vacuum to achieve densification, and meanwhile, the coercive force of the magnet is improved, so that the magnet and metallic iron generate stronger adsorption, and the fatigue resistance of the metal is further improved; the final rolling temperature is 750-850 ℃, which is beneficial to the formation of samarium-cobalt-iron-boron magnetic crystals.
Furthermore, in the cold rolling process, the reduction rate is 50-80%. Under the condition of the reduction ratio, the combination of the samarium-cobalt-iron-boron magnetic crystal and the neodymium-iron-boron magnetic crystal is more facilitated.
Furthermore, in the hot galvanizing annealing process, the temperature of the heat preservation section is controlled to be 650-720 ℃, the temperature of the hot galvanizing kettle is controlled to be 420-450 ℃, and the alloying temperature is controlled to be 650-690 ℃.
Preferably, the preparation method of the killed steel for the elevator guide rail comprises the following operation steps:
s1, hot rolling the killed steel;
s2, cold rolling the killed steel;
s3, soaking the cold-rolled killed steel in a crystal phase modifier until the temperature is reduced to room temperature;
and S4, carrying out hot galvanizing and alloying on the killed steel obtained in the step S3.
In conclusion, the invention has the following beneficial effects:
in the carburizing process of the killed steel, a ferrirubin-particle cementite is formed, and the particle cementite is distributed along the interface of crystal grains to cause the cracking of a guide rail material, so that the fatigue resistance of the elevator guide rail is reduced, and the safety of the elevator guide rail is influenced. The crystal phase improver provided by the invention can permeate into crystal grains to make up pores between the crystal grains and particle cementite, so that the cracking of an elevator guide rail material is microscopically reduced, and the fatigue resistance of the elevator guide rail is further improved.
Detailed Description
To further illustrate the technical means and effects adopted by the invention to achieve the preset invention purpose, the following detailed description of the killed steel for the elevator guide rail and the preparation method thereof, the specific implementation mode, the characteristics and the effects thereof are provided.
Example 1: killed steel for elevator guide rail and preparation method thereof
Killed steel for elevator guide rails: the coating comprises the following components in percentage by mass: 4.5 wt.% silicon, 0.5 wt.% copper, 0.4 wt.% lanthanum, 0.3 wt.% neodymium, 0.5 wt.% yttrium, 0.8 wt.% ytterbium, 0.7wt.% samarium, 0.3 wt.% cobalt, 0.9wt.% boron, and the balance iron.
Wherein, neodymium and boron form neodymium-iron-boron magnetic crystals and samarium-cobalt-iron-boron magnetic crystals in the killed steel.
The preparation method of the killed steel for the elevator guide rail comprises the following operation steps:
s1, hot rolling killed steel, wherein the heating temperature is 1100-1300 ℃, the finish rolling temperature is 750-850 ℃, and the coiling temperature is 680-720 ℃;
s2, cold rolling the killed steel, wherein the reduction rate is 50-80%;
s3, soaking the cold-rolled killed steel in methyl isobutyl carbinol until the temperature is reduced to room temperature;
s4, carrying out hot galvanizing and alloying on the killed steel obtained in the step S3, controlling the temperature of the heat preservation section to be 650-720 ℃, the temperature of the hot-dip galvanized steel to be 420-450 ℃ and the alloying temperature to be 650-690 ℃.
Example 2: killed steel for elevator guide rail and preparation method thereof
Killed steel for elevator guide rails: the coating comprises the following components in percentage by mass: 5.5wt.% silicon, 1.5wt.% copper, 0.6wt.% lanthanum, 1.0wt.% neodymium, 0.7wt.% yttrium, 1.2wt.% ytterbium, 0.9wt.% samarium, 0.6wt.% cobalt, 1.2wt.% boron, and the balance iron.
Wherein, neodymium and boron form neodymium-iron-boron magnetic crystals and samarium-cobalt-iron-boron magnetic crystals in the killed steel.
The preparation method of the killed steel for the elevator guide rail comprises the following operation steps:
s1, hot rolling killed steel, wherein the heating temperature is 1100-1300 ℃, the finish rolling temperature is 750-850 ℃, and the coiling temperature is 680-720 ℃;
s2, cold rolling the killed steel, wherein the reduction rate is 50-80%;
s3, soaking the cold-rolled killed steel in methyl isobutyl carbinol until the temperature is reduced to room temperature;
s4, carrying out hot galvanizing and alloying on the killed steel obtained in the step S3, controlling the temperature of the heat preservation section to be 650-720 ℃, the temperature of the hot-dip galvanized steel to be 420-450 ℃ and the alloying temperature to be 650-690 ℃.
Example 3: killed steel for elevator guide rail and preparation method thereof
Killed steel for elevator guide rails: the coating comprises the following components in percentage by mass: 4.5 wt.% silicon, 0.9wt.% copper, 0.4 wt.% lanthanum, 0.9wt.% neodymium, 0.6wt.% yttrium, 0.8 wt.% ytterbium, 0.9wt.% samarium, 0.6wt.% cobalt, 1.2wt.% boron, and the balance iron.
Wherein, neodymium and boron form neodymium-iron-boron magnetic crystals and samarium-cobalt-iron-boron magnetic crystals in the killed steel.
The preparation method of the killed steel for the elevator guide rail comprises the following operation steps:
s1, hot rolling killed steel, wherein the heating temperature is 1100-1300 ℃, the finish rolling temperature is 750-850 ℃, and the coiling temperature is 680-720 ℃;
s2, cold rolling the killed steel, wherein the reduction rate is 50-80%;
s3, soaking the cold-rolled killed steel in butyl xanthic acid until the temperature is reduced to the room temperature;
s4, carrying out hot galvanizing and alloying on the killed steel obtained in the step S3, controlling the temperature of the heat preservation section to be 650-720 ℃, the temperature of the hot-dip galvanized steel to be 420-450 ℃ and the alloying temperature to be 650-690 ℃.
Example 4: killed steel for elevator guide rail and preparation method thereof
Killed steel for elevator guide rails: the coating comprises the following components in percentage by mass: 5.0 wt.% silicon, 0.7wt.% copper, 0.5 wt.% lanthanum, 0.8 wt.% neodymium, 0.8 wt.% yttrium, 0.9wt.% ytterbium, 0.79 wt.% samarium, 0.6wt.% cobalt, 0.9wt.% boron, and the balance iron.
Wherein, neodymium and boron form neodymium-iron-boron magnetic crystals and samarium-cobalt-iron-boron magnetic crystals in the killed steel.
The preparation method of the killed steel for the elevator guide rail comprises the following operation steps:
s1, hot rolling killed steel, wherein the heating temperature is 1100-1300 ℃, the finish rolling temperature is 750-850 ℃, and the coiling temperature is 680-720 ℃;
s2, cold rolling the killed steel, wherein the reduction rate is 50-80%;
s3, soaking the cold-rolled killed steel in butyl xanthic acid until the temperature is reduced to the room temperature;
s4, carrying out hot galvanizing and alloying on the killed steel obtained in the step S3, controlling the temperature of the heat preservation section to be 650-720 ℃, the temperature of the hot-dip galvanized steel to be 420-450 ℃ and the alloying temperature to be 650-690 ℃.
Example 5: killed steel for elevator guide rail and preparation method thereof
Killed steel for elevator guide rails: the coating comprises the following components in percentage by mass: 5.0 wt.% silicon, 0.7wt.% copper, 0.5 wt.% lanthanum, 0.8 wt.% neodymium, 0.8 wt.% yttrium, 0.9wt.% ytterbium, 0.79 wt.% samarium, 0.6wt.% cobalt, 0.9wt.% boron, and the balance iron.
Wherein, neodymium and boron form neodymium-iron-boron magnetic crystals and samarium-cobalt-iron-boron magnetic crystals in the killed steel.
The preparation method of the killed steel for the elevator guide rail comprises the following operation steps:
s1, hot rolling killed steel, wherein the heating temperature is 1100-1300 ℃, the finish rolling temperature is 750-850 ℃, and the coiling temperature is 680-720 ℃;
s2, cold rolling the killed steel, wherein the reduction rate is 50-80%;
s3, soaking the cold-rolled killed steel in ethionamide until the temperature is reduced to the room temperature;
s4, carrying out hot galvanizing and alloying on the killed steel obtained in the step S3, controlling the temperature of the heat preservation section to be 650-720 ℃, the temperature of the hot-dip galvanized steel to be 420-450 ℃ and the alloying temperature to be 650-690 ℃.
Performance testing
1. The results of comparing the killed steels for elevator guide rails obtained in examples 1 to 4 with those of the conventional elevator guide rail material test results as comparative example 1 are shown in Table 1:
TABLE 1 test results of anti-aging and anti-cracking properties
According to the test results, the elevator guide rail sedative steel provided by the invention can effectively improve the elongation percentage after fracture and the tensile strength of the elevator guide rail, namely, the anti-aging performance of the elevator guide rail material can be effectively improved, and the macroscopic view proves that in the elevator guide rail sedative steel provided by the invention, the anti-cracking capability of the elevator guide rail is improved due to the improvement of the microscopic crystal structure of the elevator guide rail material; and as can be seen from comparison of examples 3 and 4 with other examples, the addition of butyl xanthic acid further improves the crack resistance of killed steel.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The killed steel for the elevator guide rail is characterized by comprising the following components in percentage by mass: 4.5-5.5 wt.% of silicon, 0.5-1.5 wt.% of copper, 0.4-0.6 wt.% of lanthanum, 0.3-1.0 wt.% of neodymium, 0.5-0.7 wt.% of yttrium, 0.8-1.2 wt.% of ytterbium, 0.7-0.9 wt.% of samarium, 0.3-0.6 wt.% of cobalt, 0.9-1.2 wt.% of boron, and the balance of iron.
2. The killed steel for elevator guide rails according to claim 1, wherein said neodymium and boron form neodymium-iron-boron magnetic crystals inside said killed steel.
3. The killed steel for an elevator guide rail according to claim 1, wherein samarium-cobalt-iron-boron magnetic crystals are formed inside the killed steel.
4. The killed steel for the elevator guide rail according to any one of claims 1 to 3, wherein the killed steel is prepared by using a crystal phase modifier to modify the internal crystal phase of the metal.
5. The killed steel for elevator guide rails according to claim 4, wherein said crystal phase improver is any one of methyl isobutyl carbinol, thioethyl ketone, or sodium butyl xanthate.
6. A preparation method of killed steel for elevator guide rails is characterized by comprising hot rolling, cold rolling, hot galvanizing and alloying.
7. The preparation method of the killed steel for the elevator guide rail according to claim 6, wherein in the hot rolling process, the heating temperature is 1100-1300 ℃, the finish rolling temperature is 750-850 ℃, and the coiling temperature is 680-720 ℃.
8. The preparation method of the killed steel for the elevator guide rail according to claim 6, wherein the reduction rate in the cold rolling process is 50-80%.
9. The preparation method of the killed steel for the elevator guide rail according to claim 6, wherein in the hot galvanizing annealing process, the temperature of the heat preservation section is controlled to be 650-720 ℃, the temperature of the zinc pot is controlled to be 420-450 ℃, and the alloying temperature is controlled to be 650-690 ℃.
10. The preparation method of the killed steel for the elevator guide rail according to any one of claims 6 to 9, characterized by comprising the following operation steps:
s1, hot rolling the killed steel;
s2, cold rolling the killed steel;
s3, soaking the cold-rolled killed steel in a crystal phase modifier until the temperature is reduced to room temperature;
and S4, carrying out hot galvanizing and alloying on the killed steel obtained in the step S3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010571959.6A CN111549291A (en) | 2020-06-22 | 2020-06-22 | Killed steel for elevator guide rail and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010571959.6A CN111549291A (en) | 2020-06-22 | 2020-06-22 | Killed steel for elevator guide rail and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4019930A (en) * | 1975-11-19 | 1977-04-26 | Bethlehem Steel Corporation | Deep hardening machinable aluminum killed high sulfur tool steel |
| CN102296157A (en) * | 2010-06-23 | 2011-12-28 | 宝山钢铁股份有限公司 | Very low Ti control method of ultralow-carbon aluminum-silicon killed steel |
| CN102534365A (en) * | 2011-12-28 | 2012-07-04 | 首钢总公司 | Aluminum killed steel hot dip galvanized sheet and production method thereof |
| CN104919071A (en) * | 2013-01-15 | 2015-09-16 | 株式会社神户制钢所 | Si-KILLED STEEL WIRE ROD HAVING EXCELLENT FATIGUE PROPERTIES, AND SPRING USING SAME |
| CN107045910A (en) * | 2017-03-27 | 2017-08-15 | 河北工业大学 | A kind of Nd Fe B thin strip magnets and preparation method thereof |
| CN107541667A (en) * | 2017-09-01 | 2018-01-05 | 华菱安赛乐米塔尔汽车板有限公司 | A kind of anti-theft door plate carbon aluminium-killed steel hot dip Zn-Fe alloying steel plate |
-
2020
- 2020-06-22 CN CN202010571959.6A patent/CN111549291A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4019930A (en) * | 1975-11-19 | 1977-04-26 | Bethlehem Steel Corporation | Deep hardening machinable aluminum killed high sulfur tool steel |
| CN102296157A (en) * | 2010-06-23 | 2011-12-28 | 宝山钢铁股份有限公司 | Very low Ti control method of ultralow-carbon aluminum-silicon killed steel |
| CN102534365A (en) * | 2011-12-28 | 2012-07-04 | 首钢总公司 | Aluminum killed steel hot dip galvanized sheet and production method thereof |
| CN104919071A (en) * | 2013-01-15 | 2015-09-16 | 株式会社神户制钢所 | Si-KILLED STEEL WIRE ROD HAVING EXCELLENT FATIGUE PROPERTIES, AND SPRING USING SAME |
| CN107045910A (en) * | 2017-03-27 | 2017-08-15 | 河北工业大学 | A kind of Nd Fe B thin strip magnets and preparation method thereof |
| CN107541667A (en) * | 2017-09-01 | 2018-01-05 | 华菱安赛乐米塔尔汽车板有限公司 | A kind of anti-theft door plate carbon aluminium-killed steel hot dip Zn-Fe alloying steel plate |
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