CN111519103A - Preparation method of high-strength saddle shell - Google Patents
Preparation method of high-strength saddle shell Download PDFInfo
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- CN111519103A CN111519103A CN202010508107.2A CN202010508107A CN111519103A CN 111519103 A CN111519103 A CN 111519103A CN 202010508107 A CN202010508107 A CN 202010508107A CN 111519103 A CN111519103 A CN 111519103A
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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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- 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
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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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
- 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
- C21D2211/001—Austenite
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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Abstract
The invention discloses a preparation method of a high-strength saddle shell, which comprises the following steps: 1) selecting materials: the steel comprises the following chemical components in percentage by mass: c: 0.2-0.3, Mn: 1.1-1.4, Si: 0.2-0.3, B: 0.002-0.0035, and the balance of Fe and inevitable impurities; 2) plate punch forming: stamping to form a saddle shell blank with a required shape and size; 3) bending and folding edges: bending the edge part of the saddle shell blank to obtain a formed saddle shell; 4) quenching: is placed in a protective gas N2Carrying out sectional quenching treatment in the atmosphere; 5) tempering; 6) carrying out sand blasting treatment;7) and coating to obtain a finished product. The material selected by the invention has low processing difficulty, and the strength and the wear resistance are greatly improved after special heat treatment after molding.
Description
Technical Field
The invention belongs to the technical field of automobile part manufacturing, and particularly relates to a preparation method of a high-strength saddle shell.
Background
The automobile saddle shell is an important part in an automobile saddle assembly, is in direct contact with a bottom plate of a trailer box body, bears larger forward load, and therefore the automobile saddle shell is required to have higher strength and certain wear resistance, and the surface of the automobile saddle shell is frequently abraded in the using process, so that the compensation caused by the abrasion is higher. At present, the plates adopted for producing the saddle shell are mostly low-carbon steel cold-formed plates with the thickness of 8 mm.
Along with the development of the light weight trend of automobiles, the self weight of the automobiles is gradually reduced, on the contrary, the load capacity of the automobiles is gradually increased, the saddle shell is required to have larger bearing capacity, the material grade of the saddle shell is gradually upgraded, the strength of the materials is gradually improved, and the maximum tensile strength of the saddle shell material at the present stage is 700 MPa. Due to the upgrade of the material strength, equipment with higher stamping capability needs to be input, and the input cost is increased; the higher the material strength is, the greater the stamping difficulty is for the saddle shell which is a part with a complex shape, the bending angle is easy to crack or not in place, and the product quality is difficult to ensure; in addition, although the strength of the material is upgraded, the hardness of the surface of the material is still lower (HB180-250), the wear resistance of the shell is poorer, the wear rate of the shell is still higher, and the compensation is still higher.
Therefore, there is a need to develop a proper saddle shell manufacturing method, which can improve the strength and hardness of the shell and ensure that the quality of the shell meets the technical requirements.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provides a preparation method of a high-strength saddle shell.
In order to achieve the purpose, the invention adopts the technical scheme that: a preparation method of a high-strength saddle shell is characterized by comprising the following steps: the method comprises the following steps:
1) selecting materials: the steel comprises the following chemical components in percentage by mass: c: 0.2-0.3, Mn: 1.1-1.4, Si: 0.2-0.3, B: 0.002-0.0035, and the balance of Fe and inevitable impurities;
2) plate punch forming: stamping the steel selected in the step 1) to prepare a saddle shell blank with a required shape and size;
3) bending and folding edges: bending the edge part of the saddle shell blank prepared in the step 2) to obtain a formed saddle shell;
4) quenching: placing the saddle shell formed after the treatment of the step 3) in protective gas N2Carrying out sectional quenching treatment in the atmosphere;
5) tempering: tempering the saddle shell treated in the step 4);
6) sand blasting: carrying out sand blasting treatment on the saddle shell treated in the step 5);
7) coating: and (3) performing paint spraying treatment on the saddle shell treated in the step 6) to obtain a finished product.
Preferably, in the step 1), the thickness of the steel material is 5 to 7 mm.
In a preferred embodiment, in the step 1), the steel material comprises the following chemical components in percentage by mass: c: 0.23, Mn: 1.2, Si: 0.23, B: 0.003 and the balance of Fe and inevitable impurities.
As a preferred embodiment, in the step 4), the step-by-step quenching treatment specifically includes: firstly, heating the saddle shell to a low temperature of 300-350 ℃, and preserving heat for 5-10 min; then, heating the saddle shell to 500-550 ℃ in a medium temperature region, and preserving heat for 5-10 min; then, heating the saddle shell to a high temperature region of 850 ℃ and 880 ℃, and preserving heat for 5-10 min; and finally, heating the saddle shell to 910-.
As a preferred embodiment, in the step 4), the step-by-step quenching treatment specifically includes: firstly, heating a saddle shell to a low-temperature area of 330 ℃, and keeping the temperature for 5 min; then, heating the saddle shell to a middle temperature zone of 550 ℃, and preserving heat for 5 min; then, heating the saddle shell to a high-temperature region of 850 ℃, and preserving heat for 5 min; and finally, heating the saddle shell to 920 ℃, preserving the heat for 10min, conveying the saddle shell to a quenching area after the saddle shell is uniformly heated, restraining the upper surface and the lower surface of the saddle shell by using a clamp, and simultaneously spraying and quenching the upper surface and the lower surface of the saddle shell until the saddle shell is cooled to 15-35 ℃.
Preferably, the saddle shell can reciprocate in the furnace when heated in the low-temperature region, the medium-temperature region and the high-temperature region, so that the shell is uniformly heated.
Preferably, the clamp comprises an upper press head and a lower press head, the upper press head and the lower press head are controlled in a criss-cross arrangement mode, and the upper press head and the lower press head are uniformly distributed on the upper surface and the lower surface of the saddle shell.
In a preferred embodiment, the quenching medium adopted in the spray quenching treatment is clear water, and the water spraying pressure is 0.2-0.3 Mpa.
Preferably, in the step 5), the tempering temperature is 150-180 ℃, and the tempering time is 0.5-1 h.
Preferably, in the step 7), the tensile strength of the finished saddle shell is 1250-.
Compared with the prior art, the invention has the beneficial effects that:
firstly, the steel plate selected by the invention contains 1.1-1.4 mass percent of Mn and 0.002-0.0035 mass percent of B, Mn and B elements can obviously improve the hardenability of steel, and stronger comprehensive mechanical property can be obtained after subsequent heat treatment.
Secondly, the thickness of the steel plate adopted by the invention is 5-7mm, and compared with the conventional shell, the thickness of the steel plate can be reduced by 8mm, 1-3mm, the weight can be reduced by 12.5-37.5%, the light weight is realized, and the material cost is reduced by 18-30%.
Thirdly, the processing difficulty of the selected material is low, the original state of the material is suitable for conventional punch forming equipment and conventional punch forming, and the strength and the wear resistance are greatly improved after special heat treatment after forming.
Fourthly, the saddle shell is molded firstly and then subjected to heat treatment, the heating process of the heat treatment is carried out in a protective atmosphere, the surface oxidation of the shell can be greatly reduced, the heating process adopts sectional heating, the heating temperature and the heat preservation time are strictly controlled in low and medium temperature regions, and the shell is used in each heating region in the furnace body in a reciprocating mode, so that the shell can be uniformly heated.
Fifthly, the quenching temperature range of the saddle shell is strictly controlled at 915 +/-5 ℃ and is kept for 10-15min, the quenching temperature range is the temperature with the best comprehensive performance after the heat treatment of the plate, because the deformation energy storage generated by the plastic deformation of the plate can be gradually released in the process of heating from the high temperature zone of 850 plus or minus 880 ℃ to 915 +/-5 ℃, the nucleation rate of martensite can be greatly increased, the finer the martensite structure after quenching is, the higher the strength and hardness of the material, in addition, when the saddle shell is heated in the temperature range, because Mn element can be greatly dissolved in austenite, the stability of the austenite is increased, partial residual austenite can be remained in the structure after quenching, the plastic toughness of the plate is also better, but when the temperature is higher than 920 ℃, the deformation energy storage release of the plate is finished, the temperature is further increased, and the coarse structure can be caused, the strength and hardness of the material are reduced; the structure after the final quenching is martensite and ferrite, the ratio of the martensite to the ferrite can be properly controlled by heating and cooling, and the strength of the material is improved and the material has certain ductility and toughness.
Sixthly, when the saddle shell is quenched, the upper surface and the lower surface of the shell are restrained by the clamp (similar to pressure quenching), so that the influence of the pressure head on quenching is reduced, and meanwhile, the deformation of the upper pressure head and the deformation of the lower pressure head are controlled in a cross arrangement mode, and the upper pressure head and the lower pressure head are uniformly distributed on the shell; the upper surface and the lower surface are simultaneously sprayed and quenched, the quenching medium is water, the water spraying pressure is 0.2-0.3MPa, the shell is restrained to be beneficial to reducing the deformation of the shell during quenching, the quenching medium is water, and the water spraying pressure is controlled to be 0.2-0.3MPa, the cooling of water under the pressure is fast, the martensite structure obtained by quenching is finer, the strength of the shell is higher, the upper surface and the lower surface of the shell are simultaneously sprayed and quenched, the integral quenching of the plate can be ensured, and the quenching deformation can be effectively reduced due to the consistent cooling speed of the upper surface and the lower surface;
seventhly, the appearance precision of the saddle shell obtained by the method meets the technical requirements, the overall strength and the hardness are greatly improved compared with those of a common saddle shell, the tensile strength of the saddle shell reaches 1250-.
Drawings
FIG. 1 is a front view of the structure of the saddle for vehicles according to the present embodiment;
FIG. 2 is a rear view schematic of the saddle for a vehicle according to the present embodiment;
FIG. 3 is a schematic structural view of the saddle shell clamped by the clamp of the present embodiment;
FIG. 4 is a metallographic structure of the saddle shell after heat treatment;
in the figure: 1-saddle shell, 2-clamp, 2.1-upper pressure head and 2.2-lower pressure head.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
Example 1:
referring to fig. 1 and 2, the saddle shell of the present embodiment, a method for manufacturing a high-strength saddle shell of the present embodiment, comprises the following steps:
step 1), material selection: the steel comprises the following chemical components in percentage by mass: c: 0.2, Mn: 1.1, Si: 0.2, B: 0.002, the balance of Fe and inevitable impurities, and the thickness of the plate is 6 mm;
step 2) flat plate punch forming: preparing a saddle shell blank with a set shape and size by using selected steel according to a conventional stamping process;
step 3), bending and folding edges: bending the edge part of the saddle shell according to a conventional production process to enable the size to meet the technical requirement, and obtaining a formed saddle shell 1;
step 4), quenching: placing the formed saddle shell 1 in a protective gas N2The continuous furnace is used for heating, in order to uniformly heat the shell and further reduce the deformation after heat treatment, the heating process adopts sectional heating, firstly the saddle shell 1 is heated to 350 ℃ and is insulated for 5min, then the saddle shell 1 is heated to 550 ℃ and is insulated for 5min, then the saddle shell 1 is heated to a high temperature region of 850 ℃ and is insulated for 5min, the saddle shell 1 can do reciprocating motion in the furnace when being heated in a low temperature region, a medium temperature region and a high temperature region so as to uniformly heat the shell, finally the saddle shell 1 is heated to 920 ℃ and is insulated for 10min, after the saddle shell 1 is uniformly heated, the saddle shell 1 is conveyed to a quenching region, a clamp 2 is adopted to carry out certain restraint on the shell, as shown in figure 3, the clamp 2 comprises an upper pressure head 2.1 and a lower pressure head 2.2, the upper pressure head 2.1 and the lower pressure head 2.2 are controlled in a cross arrangement mode, the upper pressure head 2.1 and the lower pressure head 2 are uniformly, then, spraying and quenching the upper surface and the lower surface of the saddle shell 1, wherein the quenching medium is clean water, and the water spraying pressure is 0.2MPa until the saddle shell 1 is cooled to 35 ℃;
step 5) tempering: putting the quenched saddle shell into a box-type furnace for tempering, wherein the tempering temperature is 150 ℃, and the tempering time is 1 h;
step 6), sand blasting: carrying out sand blasting treatment on the saddle shell after the tempering is finished, and removing oxide skin and other stains on the surface of the shell;
step 7) coating: and (5) performing paint spraying treatment on the sand-sprayed saddle shell to obtain a finished product.
The appearance precision of the saddle shell obtained by the invention meets the technical requirements, the overall strength and hardness are greatly improved compared with the common saddle shell, the tensile strength of the saddle shell reaches 1250MPa, the yield strength reaches 950MPa, the elongation is 8%, the yield ratio is 76%, the product of strength and elongation is 13750MPa, the surface hardness is HRc40-43, and the metallographic structure after tempering is low-carbon lath martensite + ferrite, which is (75% -85%) lath martensite + (15% -25%) austenite as shown in figure 4. The saddle shell meets the relevant requirements in the national standard GB/T20069 plus 2006 intensity test for the traction seat of the road vehicle, and has no phenomena of fracture, cracking and deformation after 200 ten thousand tests.
Example 2:
the preparation method of the high-strength saddle shell comprises the following steps:
step 1): selecting materials: the steel comprises the following chemical components in percentage by mass: c: 0.3, Mn: 1.4, Si: 0.3, B: 0.0035, and the balance of Fe and inevitable impurities, wherein the thickness of the plate is 6 mm;
step 2) flat plate punch forming: preparing a saddle shell blank with a set shape and size by using selected steel according to a conventional stamping process;
step 3), bending and folding edges: bending the edge part of the saddle shell according to a conventional production process to enable the size to meet the technical requirement, and obtaining a formed saddle shell 1;
step 4), quenching: placing the formed saddle shell 1 in a protective gas N2The continuous furnace is used for heating, in order to uniformly heat the shell and further reduce the deformation after heat treatment, sectional heating is adopted in the heating process, firstly the saddle shell 1 is heated to 300 ℃ and is insulated for 10min, then the saddle shell 1 is heated to 500 ℃ and is insulated for 10min, then heating the saddle shell 1 to a high temperature zone of 880 ℃, preserving heat for 10min, reciprocating the saddle shell 1 in a furnace when heating the saddle shell in the low temperature zone and the medium temperature zone so as to uniformly heat the shell, finally heating the saddle shell 1 to a temperature of 910 ℃, preserving heat for 15min, after the saddle shell 1 is uniformly heated, conveying saddle casing 1 to quenching district, adopting anchor clamps 2 to carry out certain restraint to the casing, anchor clamps 2 include pressure head 2.1 and lower pressure head 2.2, go up pressure head 2.1 and lower pressure head 2.2 and adopt the mode control of cross arrangement, go up pressure head 2.1 and lower pressure head 2.2 evenly distributed on saddle casing 1 from top to bottom.Then, spraying and quenching the upper surface and the lower surface of the shell, wherein the quenching medium is clear water, and the water spraying pressure is 0.3Mpa until the saddle shell 1 is cooled to 15 ℃;
step 5) tempering: putting the quenched saddle shell into a box-type furnace for tempering, wherein the tempering temperature is 180 ℃, and the tempering time is 0.5 h;
step 6), sand blasting: carrying out sand blasting treatment on the saddle shell after the tempering is finished, and removing oxide skin and other stains on the surface of the shell;
step 7) coating: and (5) performing paint spraying treatment on the sand-sprayed saddle shell to obtain a finished product.
The appearance precision of the saddle shell obtained by the invention meets the technical requirements, the overall strength and hardness are greatly improved compared with the common saddle shell, the tensile strength of the saddle shell reaches 1450MPa, the yield strength reaches 1150MPa, the elongation is 10%, the yield ratio is 79%, the product of strength and elongation is 14500MPa, the surface hardness is HRC42-46, and the metallographic structure after tempering is low-carbon lath martensite + ferrite, namely (80% -90%) lath martensite + austenite (10% -20%). The saddle shell meets the relevant requirements of national standard GB/T20069-2006 road vehicle traction seat strength test, and has no phenomena of fracture, cracking and deformation after 200 ten thousand tests.
Example 3:
the preparation method of the high-strength saddle shell comprises the following steps:
step 1): selecting materials: the steel comprises the following chemical components in percentage by mass: c: 0.23, Mn: 1.2, Si: 0.23, B: 0.003 of iron (Fe) and inevitable impurities in balance, and the thickness of the plate is 6 mm;
step 2) flat plate punch forming: preparing a saddle shell with a set shape and size by using selected steel according to a conventional stamping process;
step 3), bending and folding edges: bending the edge part of the saddle shell according to a conventional production process to enable the size to meet the technical requirement, and obtaining a formed saddle shell 1;
step 4), quenching: the formed saddle shell 1 is placed in a continuous furnace filled with protective gas N2 for heating, in order to uniformly heat the shell and further reduce the deformation after heat treatment, sectional heating is adopted in the heating process, firstly the saddle shell 1 is heated to 330 ℃ and is kept for 5min, then the shell is heated to 550 ℃ and is kept for 5min, then the saddle shell 1 is heated to a high temperature region 850 ℃ and is kept for 5min, the saddle shell 1 can do reciprocating motion in the furnace when being heated in low, medium and high temperature regions so as to uniformly heat the saddle shell 1, finally the saddle shell 1 is heated to 920 ℃ and is kept for 10min, after the saddle shell 1 is uniformly heated, the saddle shell 1 is conveyed to a quenching region, a clamp 2 is adopted to carry out certain constraint on the shell, the clamp 2 comprises an upper pressure head 2.1 and a lower pressure head 2.2, the upper pressure head 2.1 and the lower pressure head 2.2 are controlled in a cross arrangement mode, the upper pressure head 2.1 and the lower pressure head 2.2 are uniformly distributed on the upper surface and the, then, spraying and quenching the upper surface and the lower surface of the saddle shell 1, wherein the quenching medium is clean water, and the water spraying pressure is 0.3MPa until the saddle shell 1 is cooled to 25 ℃;
step 5) tempering: putting the quenched saddle shell into a box-type furnace for tempering, wherein the tempering temperature is 150 ℃, and the tempering time is 0.5 h;
step 6), sand blasting: carrying out sand blasting treatment on the saddle shell after the tempering is finished, and removing oxide skin and other stains on the surface of the shell;
step 7) coating: and (5) performing paint spraying treatment on the sand-sprayed saddle shell to obtain a finished product.
The shape precision of the saddle shell obtained by the invention meets the technical requirements, the overall strength and hardness are greatly improved compared with the common saddle shell, the tensile strength of the saddle shell reaches 1480MPa, the yield strength reaches 1150MPa, the elongation is 11%, the yield ratio is 78%, the product of strength and elongation is 16280MPa, the surface hardness is HRc42-46, and the metallographic structure after tempering is (80% -90%) lath martensite + (10% -20%) austenite. The saddle shell meets the relevant requirements in the national standard GB/T20069 plus 2006 intensity test for the traction seat of the road vehicle, and has no phenomena of fracture, cracking and deformation after 200 ten thousand tests.
The above description is only for the specific embodiments of the present invention, and it should be noted that the remaining detailed descriptions are related to the prior art, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (10)
1. A preparation method of a high-strength saddle shell is characterized by comprising the following steps: the method comprises the following steps:
1) selecting materials: the steel comprises the following chemical components in percentage by mass: c: 0.2-0.3, Mn: 1.1-1.4, Si: 0.2-0.3, B: 0.002-0.0035, and the balance of Fe and inevitable impurities;
2) plate punch forming: stamping the steel selected in the step 1) to prepare a saddle shell blank with a required shape and size;
3) bending and folding edges: bending the edge part of the saddle shell blank prepared in the step 2) to obtain a formed saddle shell (1);
4) quenching: placing the saddle shell (1) formed after the treatment of the step 3) in protective gas N2Carrying out sectional quenching treatment in the atmosphere;
5) tempering: tempering the saddle shell (1) treated in the step 4);
6) sand blasting: carrying out sand blasting treatment on the saddle shell (1) treated in the step 5);
7) coating: and (3) performing paint spraying treatment on the saddle shell (1) treated in the step 6) to obtain a finished product.
2. The method of making a high strength saddle shell according to claim 1 wherein: in the step 1), the thickness of the steel is 5-7 mm.
3. The method of making a high strength saddle shell according to claim 1 wherein: in the step 1), the steel comprises the following chemical components in percentage by mass: c: 0.23, Mn: 1.2, Si: 0.23, B: 0.003 and the balance of Fe and inevitable impurities.
4. The method of making a high strength saddle shell according to claim 1 wherein: in the step 4), the step of sectional quenching treatment specifically comprises the following steps: firstly, heating the saddle shell (1) to a low temperature of 300-; then, heating the saddle shell (1) to the middle temperature region of 500-; then, heating the saddle shell (1) to a high temperature region of 850 ℃ and 880 ℃, and preserving heat for 5-10 min; and finally, heating the saddle shell (1) to 910-920 ℃, preserving heat for 10-15min, after the saddle shell (1) is uniformly heated, conveying the saddle shell (1) to a quenching area, restraining the upper surface and the lower surface of the saddle shell (1) by adopting a clamp (2), and then simultaneously spraying and quenching the upper surface and the lower surface of the saddle shell (1) until the saddle shell (1) is cooled to 15-35 ℃.
5. The method of making a high strength saddle shell according to claim 4 wherein: in the step 4), the step of sectional quenching treatment specifically comprises the following steps: firstly, heating a saddle shell (1) to a low temperature region of 330 ℃, and preserving heat for 5 min; then, heating the saddle shell (1) to a middle temperature zone of 550 ℃, and preserving heat for 5 min; then, heating the saddle shell (1) to a high-temperature region of 850 ℃, and preserving heat for 5 min; and finally, heating the saddle shell (1) to 920 ℃, preserving heat for 10min, conveying the saddle shell (1) to a quenching area after the saddle shell (1) is uniformly heated, restraining the upper surface and the lower surface of the saddle shell (1) by adopting a clamp (2), and then simultaneously spraying and quenching the upper surface and the lower surface of the saddle shell (1) until the saddle shell (1) is cooled to 15-35 ℃.
6. Method for the preparation of a high-strength saddle shell according to claim 4 or 5, characterized in that: the saddle shell (1) can reciprocate in the furnace when heated in a low-temperature zone, a medium-temperature zone and a high-temperature zone, so that the shell is uniformly heated.
7. Method for the preparation of a high-strength saddle shell according to claim 4 or 5, characterized in that: anchor clamps (2) are including last pressure head (2.1) and lower pressure head (2.2), go up pressure head (2.1) and lower pressure head (2.2) and adopt the mode control of cross arrangement, go up pressure head (2.1) and lower pressure head (2.2) evenly distributed on saddle casing (1) the lower surface from top to bottom.
8. Method for the preparation of a high-strength saddle shell according to claim 4 or 5, characterized in that: the quenching medium adopted in the spray quenching treatment is clear water, and the water spraying pressure is 0.2-0.3 Mpa.
9. The method of making a high strength saddle shell according to claim 1 wherein: in the step 5), the tempering temperature of the tempering treatment is 150-.
10. The method of making a high strength saddle shell according to claim 1 wherein: in the step 7), the tensile strength of the finished saddle shell is 1250-.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821167A (en) * | 2022-12-01 | 2023-03-21 | 宁波祥路中天新材料科技股份有限公司 | Ultrahigh-strength saddle plate and manufacturing method thereof |
| CN116024502A (en) * | 2022-12-29 | 2023-04-28 | 中国重汽集团济南动力有限公司 | High-strength high-elongation light saddle shell and preparation method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104588473A (en) * | 2014-11-28 | 2015-05-06 | 中国科学院金属研究所 | High-strength plastic product automobile part hot stamping and carbon partition integrated process |
| JP2015104753A (en) * | 2013-12-02 | 2015-06-08 | 新日鐵住金株式会社 | Manufacturing method of hot stamp steel material and hot stamp steel material |
| CN104846274A (en) * | 2015-02-16 | 2015-08-19 | 重庆哈工易成形钢铁科技有限公司 | Steel plate for hot stamping, hot stamping process and hot-stamped member |
| CN105033098A (en) * | 2015-07-08 | 2015-11-11 | 中国科学院金属研究所 | Manufacturing method of high-strength, high-toughness and abrasion-resistant disc harrow |
| WO2018098485A1 (en) * | 2016-11-28 | 2018-05-31 | Ak Steel Properties, Inc. | Method for production for press hardened steel with increased toughness |
| CN109022722A (en) * | 2018-07-23 | 2018-12-18 | 中国科学院金属研究所 | A kind of high-intensitive, high tenacity plow standard manufacturing method |
| CN109702014A (en) * | 2018-12-25 | 2019-05-03 | 衡阳华菱钢管有限公司 | The fixed square device of Trailer car shaft, Trailer car shaft and preparation method thereof |
| CN110066961A (en) * | 2018-01-23 | 2019-07-30 | 福特全球技术公司 | Microalloying manganese boron steel |
-
2020
- 2020-06-05 CN CN202010508107.2A patent/CN111519103B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015104753A (en) * | 2013-12-02 | 2015-06-08 | 新日鐵住金株式会社 | Manufacturing method of hot stamp steel material and hot stamp steel material |
| CN104588473A (en) * | 2014-11-28 | 2015-05-06 | 中国科学院金属研究所 | High-strength plastic product automobile part hot stamping and carbon partition integrated process |
| CN104846274A (en) * | 2015-02-16 | 2015-08-19 | 重庆哈工易成形钢铁科技有限公司 | Steel plate for hot stamping, hot stamping process and hot-stamped member |
| CN105033098A (en) * | 2015-07-08 | 2015-11-11 | 中国科学院金属研究所 | Manufacturing method of high-strength, high-toughness and abrasion-resistant disc harrow |
| WO2018098485A1 (en) * | 2016-11-28 | 2018-05-31 | Ak Steel Properties, Inc. | Method for production for press hardened steel with increased toughness |
| CN110066961A (en) * | 2018-01-23 | 2019-07-30 | 福特全球技术公司 | Microalloying manganese boron steel |
| CN109022722A (en) * | 2018-07-23 | 2018-12-18 | 中国科学院金属研究所 | A kind of high-intensitive, high tenacity plow standard manufacturing method |
| CN109702014A (en) * | 2018-12-25 | 2019-05-03 | 衡阳华菱钢管有限公司 | The fixed square device of Trailer car shaft, Trailer car shaft and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| MU YAN-HONG， ET AL: "Influences of hot stamping parameters on mechanical properties and microstructure of 30MnB5 and 22MnB5 quenched in flat die", 《JOURNAL OF CENTRAL SOUTH UNIVERSITY》 * |
| 程俊业 等: "回火温度对淬火后30MnB5 热成形钢组织与性能", 《北京科技大学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821167A (en) * | 2022-12-01 | 2023-03-21 | 宁波祥路中天新材料科技股份有限公司 | Ultrahigh-strength saddle plate and manufacturing method thereof |
| CN115821167B (en) * | 2022-12-01 | 2024-02-02 | 宁波祥路中天新材料科技股份有限公司 | Ultrahigh-strength saddle plate and manufacturing method thereof |
| CN116024502A (en) * | 2022-12-29 | 2023-04-28 | 中国重汽集团济南动力有限公司 | High-strength high-elongation light saddle shell and preparation method thereof |
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