CN111926249A - HB hardness 600 grade steel plate and production method thereof - Google Patents
HB hardness 600 grade steel plate and production method thereof Download PDFInfo
- Publication number
- CN111926249A CN111926249A CN202010686177.7A CN202010686177A CN111926249A CN 111926249 A CN111926249 A CN 111926249A CN 202010686177 A CN202010686177 A CN 202010686177A CN 111926249 A CN111926249 A CN 111926249A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- hardness
- temperature
- steel
- quenching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- 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
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
-
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
-
- 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
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
Abstract
The invention discloses a HB (British hardness) 600 grade steel plate and a production method thereof, wherein the steel plate comprises the following chemical components in percentage by mass: c: 0.6-0.8%, Si: 0.30-0.70%, P is less than or equal to 0.025%, S is less than or equal to 0.025%, Mn: 2.0-3.0%, Cr: 0.5-0.8%, V: 0.15-0.20%, Ti: 0.035-0.045% and the balance of Fe and inevitable impurity elements; the production method comprises the working procedures of heating, rolling and heat treatment. The steel plate provided by the invention has the advantages that the yield strength is more than or equal to 1800MPa, the tensile strength is more than or equal to 1900MPa, the elongation is more than or equal to 7%, the normal-temperature U-shaped impact toughness is more than 12J, the HB hardness is 600-.
Description
Technical Field
The invention relates to a steel plate with HB (high hardness) 600 grade and a production method thereof.
Background
The alloy tool mold industry in China is developed rapidly, the total output is increased obviously, the total output of the domestic mold is second to the United states, and the domestic mold has leaped the second place in the world and becomes a genuine large mold country. The achievement can be mainly derived from the wide market which is unique in China and the advantages of relatively low resources and labor force, the great advantage is occupied in the international die casting trade market with very obvious cost performance, and the development prospect of the die casting industry in China is very wide in the future according to the situation.
Although the tool steel in China has great breakthrough in recent years, the international famous degree ranking of the tool steel is still behind, the yield is increasingly increased, but most die-casting dies are only used domestically. Due to the restriction of the technology, the product quality is difficult to break through, especially the contradiction between the process cost and the performance is gradually deepened, olive branches are frequently stretched out from domestic large-scale demand enterprises to foreign die-casting die enterprises, and the domestic die-casting enterprises are difficult to master due to serious trade adversity.
Tool steels are a general term for high-quality steels used for molds, blades, gauges, etc. which require high hardness, toughness and high wear resistance, and are roughly classified into three types, carbon tool steels, alloy tool steels and high-speed tool steels. The prior high-end alloy tool steel should have the following characteristics: firstly, the hardness is high at the use temperature, and the wear resistance is good; secondly, the heat treatment is easy, and the heat treatment deformation and the quenching crack are not easy to generate; (iii) toughness, sufficiently high resistance to impact or bending load, and (iv) retention of hardness during heating. Therefore, various alloying elements are often added and proper heat treatment is required to ensure the required properties. In particular, in recent years, demands for hardness and toughness of tool steel have been increasing, and there is a constant demand for extending the service life of tools. For this reason, in addition to the active progress in the improvement of various tool steel groups and the development of new steel grades as described above, there is also growing interest in the development of new tool materials.
The invention provides a steel plate with HB hardness of 600 grade and a production method thereof, and the steel has high technical content and high development difficulty, is the first time in domestic production, has the effect of realizing localization by virtue of production jacking and has good market prospect. The steel is mainly characterized in that: (1) the thickness of the steel plate is large and reaches the specification of 30 mm; (2) the strength grade is high, and reaches 1800Mpa grade, so that the wear resistance of the steel is ensured; (3) the process design without adding Mo and Ni reduces the production cost. (4) The optimized heat treatment system ensures that the steel plate has certain toughness index.
Disclosure of Invention
Aiming at the problems, the invention provides the steel plate with the HB hardness of 600 grade, the yield strength of the steel plate is more than or equal to 1800MPa, the tensile strength is more than or equal to 1900MPa, the elongation is more than or equal to 7%, the normal-temperature U-shaped impact toughness is more than 12J, the HB hardness is 600-plus 670, the maximum thickness can reach 30mm, and the production cost is low.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an HB hardness 600 grade steel plate comprises the following chemical components in percentage by mass: 0.6-0.8%, Si: 0.30-0.70%, P is less than or equal to 0.025%, S is less than or equal to 0.025%, Mn: 2.0-3.0%, Cr: 0.5-0.8%, V: 0.15-0.20%, Ti: 0.035-0.045%, and the balance of Fe and inevitable impurity elements.
The invention also provides a production method of the steel plate with the HB hardness of 600 grade, which comprises the working procedures of heating, rolling and heat treatment, wherein the heat treatment is carried out by adopting a quenching and tempering mode.
The invention relates to a production method of a steel plate with HB (high hardness) 600 grade, wherein the heating process comprises the following steps: the steel billet is placed in a soaking pit after being demoulded for 12 hours, the temperature of the soaking pit is 500-.
The invention relates to a production method of a HB 600 grade steel plate, wherein a hot rolling mode is adopted in a rolling procedure.
The invention relates to a production method of an HB (high hardness) 600 grade steel plate, wherein a steel plate quenching medium is a mixture of water and kerosene, and the weight ratio of the kerosene in the mixture is 55-65%.
The invention relates to a production method of a steel plate with HB (high hardness) 600 grade, wherein the steel plate quenching process comprises the following steps: the quenching temperature is 980 and 1050 ℃, and the heat preservation is 1.5-2.0 min/mm.
The invention relates to a production method of a steel plate with HB hardness of 600 grade, wherein the steel plate is tempered within 1-5 hours after quenching, and the tempering temperature is as follows: keeping the temperature at 200 ℃ for 1-1.5min/mm at 180 ℃.
The thickness of the HB hardness 600 grade steel plate is 12-30mm, and the steel plate structure type is as follows: and (4) tempering martensite.
The HB-hardness 600 grade steel plate provided by the invention has the following functions of various chemical components:
c: the C has the function of solid solution strengthening in the steel, so that the hardness of the wear-resistant steel is increased, and the wear resistance is improved. For large thickness rail steels, strength and wear resistance are key indicators, so the carbon content is designed as: 0.6 to 0.8 percent.
Si: si can reduce the austenite phase circle and increase the quenching temperature of the steel. Si can reduce the diffusion speed of carbon in ferrite, so that carbides separated out during tempering are not easy to aggregate, the tempering stability of the steel is improved, the steel with higher Si content can obviously reduce the tempering brittleness, the steel can be tempered at lower temperature, the internal stress in the steel can be reduced, and the steel plate has higher hardness. Si can reduce the oxidation effect during friction heating, improve the cold deformation hardening rate and the wear resistance of the steel, and the wear resistance of the silicon-manganese steel is improved along with the increase of the Si content. In addition, Si has a stronger affinity for oxygen than iron, and tends to produce low-melting-point silicates during welding, which increases the fluidity of slag and molten metal, and affects the weld quality. Therefore, considering the influence of Si on the hardenability, strength, tempering stability, wear resistance and welding of steel comprehensively, the Si content is preferably in the range of 0.30 to 0.70%.
Mn: mn expands the austenite phase region of the iron-carbon equilibrium phase ring, and its ability to stabilize the austenite structure is second only to Ni. Mn can significantly increase the hardenability of steel, and reduce the martensitic transformation temperature and critical cooling rate of steel. Mn and Fe can form a solid solution, increasing the hardness and strength of ferrite and austenite. Therefore, the addition of Mn increases the hardness and wear resistance of the steel, but if the Mn content is too high, it increases the temper brittleness of the steel. For the temper-treated wear-resistant steel sheet, on one hand, the Mn content needs to be increased to increase the hardness of the steel sheet, and on the other hand, the Mn content needs to be controlled to reduce the temper brittleness of the steel sheet. Therefore, the Mn content is preferably in the range of 2.0 to 3.0%.
P, S is a harmful element, and its content is reduced as much as possible.
Cr: in structural and tool steels, chromium significantly increases strength, hardness and wear resistance, increases hardenability of the steel and has a secondary hardening effect, which can increase hardness and wear resistance of high carbon steels without embrittling the steel. The main function of chromium in the quenched and tempered structural steel is to improve hardenability, so that the steel has better comprehensive mechanical properties after quenching and tempering, chromium-containing carbide can be formed in the carburizing steel, the wear resistance of the surface of the material is improved, and the chromium-containing spring steel is not easy to decarbonize during heat treatment. The chromium can improve the wear resistance, hardness and red hardness of the tool steel and has good tempering stability. In electrothermal alloys, chromium can improve the oxidation resistance, electrical resistance, and strength of the alloy. The Cr content is preferably 0.5-0.8%.
V: the steel can improve hardenability and heat resistance, prevent temper brittleness, increase remanence and coercive force and resist corrosion in certain media. In the quenched and tempered steel, molybdenum can enable parts with larger sections to be quenched deeply and thoroughly, improve the tempering resistance or tempering stability of the steel, and enable the parts to be tempered at higher temperature, so that the residual stress is effectively eliminated (or reduced), and the plasticity is improved. The preferable range of V content is 0.15-0.20%.
Ti: the grain strength is refined, the aging sensitivity and the cold brittleness are reduced, and the welding performance is improved. Ti and C form a special carbide TiC which has high melting point, high hardness and good wettability and bonding property with a matrix and is a good dispersion strengthening reinforcement. The strengthening effect of Ti on steel mainly comes from the strain strengthening of the interface of TiC and the matrix and the volume strengthening caused by the same density of TiC and the matrix. In the tempering process, Ti slows down the diffusion of C in an O phase, slows down the precipitation and growth of carbides such as Fe, Mn and the like, increases the tempering stability and can play a role in secondary hardening through TiC precipitation. The preferable range of the Ti content is 0.035-0.045%.
The invention adopts the chemical component design with lower alloy content, and Mo and Ni are not added, so the production cost is greatly reduced; in the production process, the product performance is fully ensured by optimizing the heat treatment mode, and in addition, the obtained steel plate has a finer organization structure and a better processing type, and can meet the market demand of customers.
The mechanical properties of the steel plate provided by the invention are as follows: the yield strength is more than or equal to 1800MPa, the tensile strength is more than or equal to 1900MPa, the elongation is more than or equal to 7 percent, the normal-temperature U-shaped impact toughness is more than 12J, the HB hardness is 600-670, and the maximum thickness can reach 30 mm.
Drawings
FIG. 1 is a structural view (100X) of a steel sheet of example 1.
FIG. 2 structural diagram (100X) of the steel sheet of example 2.
FIG. 3 structural diagram (100X) of the steel sheet of example 3.
FIG. 4 structural diagram (100X) of the steel sheet of example 4.
FIG. 5 structural diagram (100X) of the steel sheet of example 5.
FIG. 6 structural diagram (100X) of the steel sheet of example 6.
Detailed Description
Example 1
The thickness of the steel plate is 12mm, and the steel plate comprises the following chemical components in percentage by mass: c: 0.6%, Si: 0.32%, P: 0.015%, S: 0.005%, Mn: 2.1%, Cr: 0.52%, V: 0.155%, Ti: 0.035%, and the balance of Fe and inevitable impurity elements.
The production method of the steel plate comprises the working procedures of heating, rolling and heat treatment, and the specific process steps are as follows:
(1) and (3) demoulding the billet for 10.5 hours, then loading the billet into a soaking pit, wherein the temperature of the soaking pit is 520 ℃ during furnace loading, the temperature of the billet is increased to 1000 ℃ at the heating speed of 50 ℃/h, the temperature is increased to 1280 ℃ after 10 hours of heat preservation, and the heat preservation time is 36 hours.
(2) The steel plate is produced by adopting a hot rolling molding mode.
(3) The steel plate is subjected to heat treatment in a quenching and tempering mode, the quenching medium of the steel plate is a mixture of water and kerosene, wherein the weight ratio of the kerosene to the mixture is 55%, the quenching temperature of the steel plate is 980 ℃, and the temperature is kept for 1.5 min/mm; tempering the steel plate 2 hours after quenching, wherein the tempering temperature is as follows: keeping the temperature at 180 ℃ for 1 min/mm.
The mechanical properties of the steel plate of the embodiment are as follows: 1820MPa of yield strength, 1910MPa of tensile strength, 7.5 percent of elongation, 20J, 22J and 21J of normal-temperature U-shaped impact toughness, HB hardness: 610.
the steel plate structure is shown in figure 1, and the steel plate structure is tempered martensite.
Example 2
The thickness of the steel plate is 18mm, and the steel plate comprises the following chemical components in percentage by mass: c: 0.65%, Si: 0.42%, P: 0.010%, S: 0.003%, Mn: 2.3%, Cr: 0.62%, V: 0.17%, Ti: 0.038% and the balance of Fe and inevitable impurity elements.
The production method of the steel plate comprises the working procedures of heating, rolling and heat treatment, and the specific process steps are as follows:
(1) and (3) demoulding the billet for 10 hours, then loading the billet into a soaking pit, wherein the temperature of the soaking pit is 540 ℃ during furnace loading, the temperature of the billet is increased to 1000 ℃ at a heating speed of 60 ℃/h, the temperature is increased to 1280 ℃ after 10 hours of heat preservation, and the heat preservation time is 38 hours.
(2) The steel plate is produced by adopting a hot rolling molding mode.
(3) The steel plate is subjected to heat treatment in a quenching and tempering mode, the quenching medium of the steel plate is a mixture of water and kerosene, wherein the weight ratio of the kerosene to the mixture is 58%, the quenching temperature of the steel plate is 1000 ℃, and the temperature is kept for 1.7 min/mm; tempering the steel plate 1 hour after quenching, wherein the tempering temperature is as follows: keeping the temperature at 190 ℃ for 1 min/mm.
The mechanical properties of the steel plate of the embodiment are as follows: yield strength 1850MPa, tensile strength 1980MPa, elongation: 10.5%, normal temperature U-shaped impact toughness of 43J, 51J and 45J, HB hardness: 620.
the steel plate structure is shown in figure 2, and the steel plate structure is tempered martensite.
Example 3
The thickness of the steel plate is 25mm, and the steel plate comprises the following chemical components in percentage by mass: c: 0.72%, Si: 0.55%, P: 0.012%, S: 0.001%, Mn: 2.7%, Cr: 0.73%, V: 0.18%, Ti: 0.038% and the balance of Fe and inevitable impurity elements.
The production method of the steel plate comprises the working procedures of heating, rolling and heat treatment, and the specific process steps are as follows:
(1) and (3) demoulding the billet for 11 hours, then loading the billet into a soaking pit, wherein the temperature of the soaking pit is 570 ℃ when the billet is loaded into a furnace, the temperature of the billet is raised to 1000 ℃ at the heating speed of 75 ℃/h, the temperature is raised to 1320 ℃ after 10 hours of heat preservation, and the heat preservation time is 38 hours.
(2) The steel plate is produced by adopting a hot rolling molding mode.
(3) The steel plate is subjected to heat treatment in a quenching and tempering mode, the quenching medium of the steel plate is a mixture of water and kerosene, the weight ratio of the kerosene to the mixture is 63%, the quenching temperature of the steel plate is 1020 ℃, and the temperature is kept for 1.8 min/mm; tempering the steel plate for 4 hours after quenching, wherein the tempering temperature is as follows: keeping the temperature at 190 ℃ for 1.3 min/mm.
The mechanical properties of the steel plate of the embodiment are as follows: yield strength 1870MPa, tensile strength 1960MPa, and elongation: 9.5 percent, normal-temperature U-shaped impact toughness of 37J, 45J and 40J, HB hardness: 650.
the steel plate structure is shown in figure 3, and the steel plate structure is tempered martensite.
Example 4
The thickness of the steel plate is 30mm, and the steel plate comprises the following chemical components in percentage by mass: c: 0.8%, Si: 0.7%, P: 0.018%, S: 0.003%, Mn: 3.0%, Cr: 0.8%, V: 0.2%, Ti: 0.045%, and the balance of Fe and inevitable impurity elements.
The production method of the steel plate comprises the working procedures of heating, rolling and heat treatment, and the specific process steps are as follows:
(1) and (3) demoulding the billet for 12 hours, then loading the billet into a soaking pit, wherein the temperature of the soaking pit is 600 ℃ when the billet is loaded into a furnace, the temperature of the billet is raised to 1000 ℃ at the heating speed of 80 ℃/h, the temperature is raised to 1350 ℃ after 10 hours of heat preservation, and the heat preservation time is 38 hours.
(2) The steel plate is produced by adopting a hot rolling molding mode.
(3) The steel plate is subjected to heat treatment in a quenching and tempering mode, the quenching medium of the steel plate is a mixture of water and kerosene, wherein the weight ratio of the kerosene to the mixture is 65%, the quenching temperature of the steel plate is 1050 ℃, and the temperature is kept for 2 min/mm; tempering 3 hours after quenching the steel plate, wherein the tempering temperature is as follows: keeping the temperature at 200 ℃ for 1.5 min/mm.
The mechanical properties of the steel plate of the embodiment are as follows: the steel plate yield strength is 1880MPa, the tensile strength is 1990MPa, and the elongation percentage is as follows: 10%, normal temperature U-shaped impact toughness of 39J, 42J and 43J, HB hardness: 670.
the steel plate structure is shown in figure 4, and the steel plate structure is tempered martensite.
Example 5
The thickness of the steel plate is 22mm, and the steel plate comprises the following chemical components in percentage by mass: c: 0.76%, Si: 0.64%, P: 0.022%, S: 0.021%, Mn: 2.5%, Cr: 0.5%, V: 0.15%, Ti: 0.042 percent, and the balance of Fe and inevitable impurity elements.
The production method of the steel plate comprises the working procedures of heating, rolling and heat treatment, and the specific process steps are as follows:
(1) and (3) demoulding the billet for 11.5 hours, then loading the billet into a soaking pit, wherein the temperature of the soaking pit is 500 ℃ when the billet is loaded into a furnace, the temperature of the billet is raised to 1000 ℃ at a heating speed of 55 ℃/h, the temperature is raised to 1300 ℃ after the billet is kept for 12 hours, and the temperature keeping time is 40 hours.
(2) The steel plate is produced by adopting a hot rolling molding mode.
(3) The steel plate is subjected to heat treatment in a quenching and tempering mode, the quenching medium of the steel plate is a mixture of water and kerosene, wherein the weight ratio of the kerosene to the mixture is 60%, the quenching temperature of the steel plate is 1035 ℃, and the temperature is kept for 1.6 min/mm; tempering the steel plate 5 hours after quenching, wherein the tempering temperature is as follows: keeping the temperature at 195 ℃ for 1.2 min/mm.
The mechanical properties of the steel plate of the embodiment are as follows: steel sheet yield strength 1860MPa, tensile strength 1950MPa, elongation: 9 percent, normal-temperature U-shaped impact toughness of 38J, 40J and 41J, HB hardness: 640.
the steel plate structure is shown in figure 5, and the steel plate structure is tempered martensite.
Example 6
The thickness of the steel plate is 28mm, and the steel plate comprises the following chemical components in percentage by mass: c: 0.7%, Si: 0.3%, P: 0.012%, S: 0.008%, Mn: 2.0%, Cr: 0.76%, V: 0.19%, Ti: 0.040%, and the balance of Fe and inevitable impurity elements.
The production method of the steel plate comprises the working procedures of heating, rolling and heat treatment, and the specific process steps are as follows:
(1) and (3) demoulding the billet for 11 hours, then loading the billet into a soaking pit, wherein the temperature of the soaking pit is 590 ℃, the temperature of the billet is increased to 1000 ℃ at the heating speed of 65 ℃/h when the billet is loaded into a furnace, the temperature is increased to 1330 ℃ after the billet is kept for 11 hours, and the temperature is kept for 37 hours.
(2) The steel plate is produced by adopting a hot rolling molding mode.
(3) The steel plate is subjected to heat treatment in a quenching and tempering mode, the quenching medium of the steel plate is a mixture of water and kerosene, wherein the weight ratio of the kerosene to the mixture is 62%, the quenching temperature of the steel plate is 1050 ℃, and the temperature is kept for 2 min/mm; tempering 3 hours after quenching the steel plate, wherein the tempering temperature is as follows: keeping the temperature at 185 ℃ for 1.1 min/mm.
The mechanical properties of the steel plate of the embodiment are as follows: the yield strength of the steel plate is 1810MPa, the tensile strength is 1940MPa, and the elongation is as follows: 8 percent, normal-temperature U-shaped impact toughness of 43J, 47J and 49J, HB hardness: 630.
the steel plate structure is shown in figure 6, and the steel plate structure is tempered martensite.
Claims (8)
1. A HB (high hardness) 600 grade steel plate is characterized in that: the steel plate comprises the following chemical components in percentage by mass: c: 0.6-0.8%, Si: 0.30-0.70%, P is less than or equal to 0.025%, S is less than or equal to 0.025%, Mn: 2.0-3.0%, Cr: 0.5-0.8%, V: 0.15-0.20%, Ti: 0.035-0.045%, and the balance of Fe and inevitable impurity elements.
2. A method for producing an HB hardness 600 grade steel sheet as claimed in claim 1, characterized in that: the production method comprises the working procedures of rolling, cooling and heat treatment, wherein the heat treatment is carried out in a quenching and tempering mode.
3. The method for producing a steel sheet having a hardness of HB 600 grade according to claim 2, wherein: the heating procedure comprises the following steps: the steel billet is placed in a soaking pit after being demoulded for 12 hours, the temperature of the soaking pit is 500-.
4. The method for producing a steel sheet having a hardness of HB 600 grade according to claim 2, wherein: the rolling procedure adopts a hot rolling mode.
5. The method for producing a steel sheet having a hardness of HB 600 grade according to claim 2, wherein: the medium for quenching the steel plate in the heat treatment process is a mixture of water and kerosene, wherein the kerosene accounts for 55-65% of the mixture by weight.
6. The method for producing a steel sheet having a hardness of HB 600 grade according to claim 2, wherein: the steel plate quenching process in the heat treatment process comprises the following steps: the quenching temperature is 980 and 1050 ℃, and the heat preservation is 1.5-2.0 min/mm.
7. The method for producing a steel sheet having a hardness of HB 600 grade according to claim 2, wherein: in the heat treatment process, the steel plate is tempered within 1-5 hours after quenching, and the tempering temperature is as follows: keeping the temperature at 200 ℃ for 1-1.5min/mm at 180 ℃.
8. The production method of the HB hardness 600 grade steel plate according to claim 2, wherein the thickness of the steel plate is 12-30mm, and the steel plate structure type is as follows: and (4) tempering martensite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010686177.7A CN111926249A (en) | 2020-07-16 | 2020-07-16 | HB hardness 600 grade steel plate and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010686177.7A CN111926249A (en) | 2020-07-16 | 2020-07-16 | HB hardness 600 grade steel plate and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111926249A true CN111926249A (en) | 2020-11-13 |
Family
ID=73313076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010686177.7A Withdrawn CN111926249A (en) | 2020-07-16 | 2020-07-16 | HB hardness 600 grade steel plate and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111926249A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002030341A (en) * | 2000-07-13 | 2002-01-31 | Nippon Steel Corp | Method for producing high weldability rail |
| CN101649414A (en) * | 2008-08-15 | 2010-02-17 | 宝山钢铁股份有限公司 | Low alloy easy-welding and wear-resistant steel, steel plate and manufacturing method |
| CN105543689A (en) * | 2016-01-16 | 2016-05-04 | 舞阳钢铁有限责任公司 | Steel plate with shear strength above 1150 MPa and production method thereof |
| CN108160741A (en) * | 2017-12-28 | 2018-06-15 | 东莞科力线材技术有限公司 | Press part steel alloy wire rod preparation method, press part and its hardening and tempering process |
| CN110055457A (en) * | 2019-03-28 | 2019-07-26 | 舞阳钢铁有限责任公司 | A kind of high alloy tool steel plate and its production method |
-
2020
- 2020-07-16 CN CN202010686177.7A patent/CN111926249A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002030341A (en) * | 2000-07-13 | 2002-01-31 | Nippon Steel Corp | Method for producing high weldability rail |
| CN101649414A (en) * | 2008-08-15 | 2010-02-17 | 宝山钢铁股份有限公司 | Low alloy easy-welding and wear-resistant steel, steel plate and manufacturing method |
| CN105543689A (en) * | 2016-01-16 | 2016-05-04 | 舞阳钢铁有限责任公司 | Steel plate with shear strength above 1150 MPa and production method thereof |
| CN108160741A (en) * | 2017-12-28 | 2018-06-15 | 东莞科力线材技术有限公司 | Press part steel alloy wire rod preparation method, press part and its hardening and tempering process |
| CN110055457A (en) * | 2019-03-28 | 2019-07-26 | 舞阳钢铁有限责任公司 | A kind of high alloy tool steel plate and its production method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109280850B (en) | 80mm large-thickness high-toughness low-alloy wear-resistant steel plate and manufacturing method thereof | |
| CN101775545B (en) | Low-alloy high-strength high-toughness wear-resistant steel plate and manufacturing method thereof | |
| AU2019101844A4 (en) | Thick NM500 wear-resistant steel and production method therefor | |
| AU2013344748B2 (en) | Method for the production of high-wear-resistance martensitic cast steel and steel with said characteristics | |
| CN101775539B (en) | High-flexibility wear-resistant steel plate and manufacturing method thereof | |
| CN105018854B (en) | High-fire resistance hot die steel and preparation method | |
| CN104313462A (en) | High wear-resistant hot-stamping die steel and manufacturing method thereof | |
| CN102234743A (en) | Low carbon martensite steel plate and production method | |
| JP2011236493A (en) | Press forming mold made of spherical graphite cast iron and method of manufacturing the same | |
| CN108998725A (en) | Track link rail 35MnBM steel and preparation method thereof | |
| US11959158B2 (en) | Hot-work die steel with high toughness at low temperatures and high strength at high temperatures and high hardenability and preparation method thereof | |
| CN105039861A (en) | Medium-manganese and boracic low-alloy abrasion-resistant steel plate and preparing method thereof | |
| CN101649414A (en) | Low alloy easy-welding and wear-resistant steel, steel plate and manufacturing method | |
| CN114540716B (en) | High-strength high-toughness long-service-life steel for valve body of underwater Christmas tree with wall thickness of more than or equal to 600mm, and heat treatment method and production method thereof | |
| CN111378909A (en) | High-toughness high manganese steel lining plate and production process thereof | |
| CN105483562A (en) | High-bending-resistance, high-strength and high-toughness die steel and manufacturing method thereof | |
| CN112195417B (en) | High-wear-resistance and high-toughness steel bar for excavator bucket teeth and preparation method thereof | |
| CN104532150A (en) | Economical and ultra-wide saw steel and preparation method thereof | |
| CN116121644A (en) | High-toughness mine disc saw blade steel plate and manufacturing method thereof | |
| CN110055475A (en) | A kind of roll low-phosphorous sulphur rare-earth alloy material and preparation method thereof | |
| CN113462986B (en) | 2000MPa environment-friendly heat-resistant steel for agricultural machinery and manufacturing method thereof | |
| CN109321829A (en) | A kind of yield strength 900MPa grades of stainless steel plates and manufacturing method | |
| CN111926249A (en) | HB hardness 600 grade steel plate and production method thereof | |
| CN112281058B (en) | Steel for large forklift goods fork and production process thereof | |
| CN114807744A (en) | Steel for excavator guide wheel outer wheel ring and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201113 |
|
| WW01 | Invention patent application withdrawn after publication |