CN109396757B - Bulletproof vehicle shell and production method thereof - Google Patents
Bulletproof vehicle shell and production method thereof Download PDFInfo
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- CN109396757B CN109396757B CN201811124649.9A CN201811124649A CN109396757B CN 109396757 B CN109396757 B CN 109396757B CN 201811124649 A CN201811124649 A CN 201811124649A CN 109396757 B CN109396757 B CN 109396757B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
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Abstract
The invention discloses a bulletproof vehicle shell and a production method thereof, wherein the method comprises the following steps: cutting the bulletproof plate according to the size of the shell of the bulletproof vehicle; welding the cut bulletproof plate, wherein the welding wire for welding has the same components as the bulletproof plate, and manufacturing a preliminary bulletproof vehicle shell; carrying out structural reinforcement on the primary bulletproof vehicle shell to form a reinforced bulletproof vehicle shell; and carrying out heat treatment on the whole of the shell of the reinforced bulletproof vehicle to obtain a finished product of the shell of the bulletproof vehicle. The technical problems that the bulletproof performance of the position of a weld joint is greatly reduced, the breakdown phenomenon occurs in a target practice test, and the overall protection requirement of a bulletproof vehicle is difficult to meet in the prior art are solved. The protective performance equivalent to that of the bulletproof plate is achieved after the weld joint of the bulletproof vehicle is subjected to heat treatment, so that the overall safety of the bulletproof vehicle is greatly improved, and the technical effect of meeting the requirement of the overall bulletproof performance is achieved.
Description
Technical Field
The invention relates to the technical field of bulletproof vehicles, in particular to a bulletproof vehicle shell and a production method thereof.
Background
With the increasing demand of bulletproof vehicles in the military industry field and the police field, high-strength-level bulletproof plates are beginning to be widely applied in the field of bulletproof vehicles. The production field of the bulletproof plate is related to domestic and international introduction, but the use process of the bulletproof plate, particularly the bulletproof performance of the bulletproof plate joint position after welding for manufacturing the bulletproof vehicle shell by utilizing the bulletproof plate is not introduced, and the problem is also the bottleneck which is difficult to solve by the prior art for bulletproof vehicle production. The bulletproof performance of the weld joint is greatly reduced, the breakdown phenomenon occurs in a target test, and the overall protection requirement of the bulletproof vehicle is difficult to meet.
Disclosure of Invention
The invention provides a bulletproof vehicle shell and a production method thereof, which are used for solving the technical problems that the bulletproof performance of a weld joint position is greatly reduced, a target test is punctured, and the overall protection requirement of a bulletproof vehicle is difficult to meet in the prior art.
In view of the above problems, the present invention provides, in a first aspect, a method for producing a bulletproof vehicle outer shell, the method comprising: cutting the bulletproof plate according to the size of the shell of the bulletproof vehicle; welding the cut bulletproof plate, wherein the welding wire for welding has the same components as the bulletproof plate, and manufacturing a preliminary bulletproof vehicle shell; carrying out structural reinforcement on the primary bulletproof vehicle shell to form a reinforced bulletproof vehicle shell; and carrying out heat treatment on the whole of the shell of the reinforced bulletproof vehicle to obtain a finished product of the shell of the bulletproof vehicle.
Preferably, the structural reinforcement of the preliminary bulletproof vehicle outer shell includes: a steel plate with the thickness more than or equal to 8mm is adopted to manufacture a reinforced steel plate; and welding the reinforced steel plate to the primary bulletproof vehicle shell to obtain the reinforced bulletproof vehicle shell.
Preferably, the welding distance of the reinforced steel plate is less than or equal to 20 cm.
Preferably, the heat treatment is performed on the whole reinforced bulletproof vehicle shell to obtain a bulletproof vehicle shell finished product, and the method comprises the following steps: the reinforced bulletproof vehicle shell is subjected to heat preservation for 10-30min at the quenching heating temperature of 850 ℃ and 950 ℃; when the quenching temperature is between 150 ℃ and 350 ℃, carrying out low-temperature tempering, and keeping the temperature for 20-60 min; cooling along with the furnace or taking the steel plate out of the furnace for air cooling; after the reinforced bulletproof vehicle shell is cooled to room temperature, cutting and polishing the welding seam connection point of the reinforced steel plate and the bulletproof plate; and (4) disassembling the reinforced steel plate to obtain the bulletproof vehicle shell finished product.
Preferably, the bulletproof plate uses steel with chemical components in percentage by weight as C: 0.20-0.45%; si: 0.20-0.80%; mn: 1.0-1.8%; nb: 0 to 0.06 percent; mo: 0.4-1.0%; v: 0 to 0.10 percent; ti: 0 to 0.08 percent; al: 0.01-0.06%; ni: 0 to 3.0 percent; cu: 0 to 1.0 percent; w: 0 to 2.0 percent; p: less than or equal to 0.011 percent; s: less than or equal to 0.004 percent; n: less than or equal to 0.008 percent; the balance of Fe and inevitable impurities.
Preferably, the strength grade of the bulletproof plate is 1500MPa to 2000 MPa.
Preferably, the cutting of the bulletproof plate is performed by adopting a laser welding or argon arc welding mode.
Preferably, the quenching medium is water quenching or oil quenching. Preferably, the bulletproof plate is cut according to the size of the bulletproof vehicle shell, and the cutting method is laser cutting or underwater plasma cutting.
In a second aspect, the invention provides a ballistic resistant vehicle shell obtained using the method.
One or more technical solutions in the embodiments of the present invention at least have one or more of the following technical effects:
1. in an embodiment of the present invention, a method for producing a bulletproof vehicle outer shell is provided, where the method includes: the bulletproof plate is cut according to the size of the shell of the bulletproof vehicle, so that the influence of thermal stress on the bulletproof plate is reduced, and deformation is avoided; welding the cut bulletproof plate, wherein the welding wire for welding has the same composition with the bulletproof plate, and the welding wire is made of the same material as the bulletproof plate, so that the protection performance equivalent to that of a base material, namely the bulletproof plate, can be achieved, and the manufactured primary bulletproof vehicle shell has stable bulletproof performance during subsequent heat treatment, thereby solving the technical problem that in the prior art, in the welding process of a steel plate, namely the bulletproof plate, the welding seam and a heat affected zone are influenced by temperature rise due to welding heat input, and the bulletproof performance at the joint position of the welding seam is greatly reduced due to changes in organization and precipitation; then, structurally reinforcing the primary bulletproof vehicle shell to form a reinforced bulletproof vehicle shell, and avoiding quenching deformation of the bulletproof vehicle shell during heat treatment in the next step, so that the quality of the bulletproof vehicle shell is ensured; and then the reinforced bulletproof vehicle shell is subjected to heat treatment, so that the weld joint reaches the bulletproof performance equivalent to that of the used bulletproof plate after the heat treatment, the bulletproof vehicle shell is ensured to reach the protection index, the residual stress is solved, the plastic toughness of the material is improved, and the overall safety of the obtained bulletproof vehicle shell finished product is greatly improved. And then solved among the prior art the bulletproof performance of welding seam joint position and declined by a wide margin, the breakdown phenomenon takes place for the target practice test, is difficult to satisfy the technical problem of shellproof car overall protection demand. The protective performance equivalent to that of the bulletproof plate is achieved after the weld joint of the bulletproof vehicle is subjected to heat treatment, so that the overall safety of the bulletproof vehicle is greatly improved, and the technical effect of meeting the requirement of the overall bulletproof performance is achieved.
2. According to the bulletproof vehicle shell provided by the embodiment of the invention, the bulletproof plate is cut according to the size of the bulletproof vehicle shell by a production method, wherein the laser cutting or underwater plasma cutting method is adopted, so that the thermal stress influence on the bulletproof plate is reduced, and the deformation is avoided; welding wires with the same components as those of the base metal are adopted for welding the cut bulletproof plate, the welding can adopt laser welding or argon arc welding, and the welding is carried out by using the same material as the bulletproof plate, so that the protective performance equivalent to that of the base metal, namely the bulletproof plate, can be achieved, and the shell of the primary bulletproof vehicle can have stable bulletproof performance during subsequent heat treatment, thereby solving the technical problem that the bulletproof performance at the joint position of a welding seam is greatly reduced due to the fact that the welding seam and a heat affected zone are influenced by temperature rise caused by welding heat input and the organization and precipitation are changed in the welding process of a steel plate, namely the bulletproof plate in the prior art; then, the primary bulletproof vehicle shell is structurally reinforced by using a reinforced steel plate made of a steel plate with the thickness of more than or equal to 8mm, the reinforcing distance is not more than 20cm, the reinforcing effect is ensured, the reinforced bulletproof vehicle shell is formed, the shell of the bulletproof vehicle is prevented from quenching deformation during the heat treatment in the next step, and the quality of the bulletproof vehicle shell is ensured; and then carrying out heat treatment on the whole shell of the reinforced bulletproof vehicle, wherein the heat treatment adopts an immersion quenching mode, the shell of the reinforced bulletproof vehicle is subjected to heat preservation for 10-30 minutes at a heating temperature of 850-. And then cooling, namely selecting furnace cooling or discharging and air cooling along with air. And finally, after the reinforced bullet-proof vehicle shell is cooled to room temperature, cutting and polishing the welding seam connection point of the reinforced steel plate and the bullet-proof plate, and detaching the reinforced steel plate to finally obtain the bullet-proof vehicle shell finished product. The bulletproof vehicle has the bulletproof performance equivalent to that of a bulletproof plate used in a weld joint, ensures that the shell performance of the bulletproof vehicle reaches the protection index, solves the residual stress and improves the plastic toughness of the material, thereby greatly improving the overall safety of the obtained shell finished product of the bulletproof vehicle. And then solved among the prior art the bulletproof performance of welding seam joint position and declined by a wide margin, the breakdown phenomenon takes place for the target practice test, is difficult to satisfy the technical problem of shellproof car overall protection demand. The protection performance of the weld joint of the bulletproof vehicle is equivalent to that of a bulletproof plate, so that the overall safety of the bulletproof vehicle is greatly improved, and the technical effect of meeting the requirement of the overall bulletproof performance is achieved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Fig. 1 is a schematic flow chart of a method for producing a bulletproof vehicle outer shell according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a bulletproof vehicle shell and a production method thereof, and solves the technical problems that the bulletproof performance of a weld joint position is greatly reduced, a target test is punctured, and the overall protection requirement of a bulletproof vehicle is difficult to meet in the prior art.
The technical method in the embodiment of the invention has the following general idea:
cutting the bulletproof plate according to the size of the shell of the bulletproof vehicle; welding the cut bulletproof plate, wherein the welding wire for welding has the same components as the bulletproof plate, and manufacturing a preliminary bulletproof vehicle shell; carrying out structural reinforcement on the primary bulletproof vehicle shell to form a reinforced bulletproof vehicle shell; and carrying out heat treatment on the whole of the shell of the reinforced bulletproof vehicle to obtain a finished product of the shell of the bulletproof vehicle. The protective performance equivalent to that of the bulletproof plate is achieved after the weld joint of the bulletproof vehicle is subjected to heat treatment, so that the overall safety of the bulletproof vehicle is greatly improved, and the technical effect of meeting the requirement of the overall bulletproof performance is achieved.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 is a schematic flow chart of a production method of a bulletproof vehicle outer shell in an embodiment of the invention. As shown in fig. 1, the method includes:
step 10: cutting the bulletproof plate according to the size of the shell of the bulletproof vehicle;
further, the bulletproof plate is cut according to the size of the bulletproof vehicle shell, and the cutting method is laser cutting or underwater plasma cutting.
Specifically, the outer plate for the bullet-proof vehicle meeting the bullet-proof requirement is cut and blanked in a laser cutting or underwater plasma cutting mode, the outer plate for the bullet-proof vehicle, namely the bullet-proof plate, is cut into bullet-proof plates with corresponding sizes according to the size of the bullet-proof vehicle, the laser cutting or underwater plasma cutting mode has the characteristic of small cutting heat, the thermal stress influence on the bullet-proof plates can be reduced to the greatest extent, and therefore the bullet-proof plates after being cut and blanked are prevented from deforming. It should be understood that the thermal stress in the embodiments of the present invention refers to a stress generated when an object is not fully free to expand or contract due to external constraint and mutual constraint between internal parts when the temperature changes, and is also referred to as temperature-changing stress.
Step 20: welding the cut bulletproof plate, wherein the welding wire for welding has the same components as the bulletproof plate, and manufacturing a preliminary bulletproof vehicle shell;
furthermore, the cutting of the bulletproof plate is performed in a laser welding or argon arc welding mode.
Specifically, the bulletproof plates cut according to the size of the bulletproof vehicle in the step 10 are sequentially welded to form a bulletproof vehicle shell shape, and the primary bulletproof vehicle shell is obtained, wherein laser welding or argon arc welding is selected for welding the bulletproof plates; argon arc welding is a welding technology using argon as a protective gas, and is also called argon gas shielded welding, namely argon gas protective gas is introduced around arc welding to isolate air outside a welding area and prevent the welding area from being oxidized. In addition, when the bulletproof plate is welded and formed in an argon arc welding mode, the used welding wire is made of a material with the same chemical composition as the bulletproof plate, the same material as the base metal can achieve the protection performance equivalent to the base metal during subsequent heat treatment, meanwhile, the argon arc welding mode is adopted for welding, the welding has the advantages of being more flexible and easy to operate, the material with the same chemical composition as the base metal is selected in the selection of the argon arc welding wire, and therefore all performances of a welded joint after heat treatment can reach the standard. When the bulletproof plate is welded and formed by using a laser welding mode, the welding wire is not needed by laser welding, so that the components of the welding connection position are equivalent to those of the base metal, and the protective performance equivalent to that of the base metal can be achieved after the welding seam position is subjected to the same heat treatment process as that of the base metal in the subsequent heat treatment process. Therefore, the technical problem that in the prior art, in the welding process of a steel plate, namely an armor plate, the anti-elasticity performance of the joint position of the welding seam is greatly reduced due to the fact that the welding seam and a heat affected zone are affected by temperature rise caused by welding heat input, and the organization and precipitation are changed is solved.
Step 30: carrying out structural reinforcement on the primary bulletproof vehicle shell to form a reinforced bulletproof vehicle shell;
further, the structural reinforcement of the preliminary bulletproof vehicle outer shell includes: a steel plate with the thickness more than or equal to 8mm is adopted to manufacture a reinforced steel plate; and welding the reinforced steel plate to the primary bulletproof vehicle shell to obtain the reinforced bulletproof vehicle shell.
Furthermore, the welding distance of the reinforced steel plates is less than or equal to 20 cm.
Specifically, after the bulletproof vehicle outer panel, i.e., the bulletproof panel, is welded and formed in step 30, the preliminary bulletproof vehicle shell is structurally reinforced to prevent deformation in subsequent processes, a reinforcing steel plate with a thickness of 8mm or more is selected and welded into a grid or other shapes, the manufactured reinforcing steel plate is welded on the preliminary bulletproof vehicle shell, in order to ensure the reinforcing effect of the reinforcing steel plate, the reinforcing steel plate is reinforced on the preliminary bulletproof vehicle shell, the distance between the reinforcing steel plate and the preliminary bulletproof vehicle shell is not more than 20cm, so that the reinforcing effect is ensured, deformation of the bulletproof vehicle in subsequent hot working is avoided, as the heat treatment adopted in the subsequent working procedure is an immersion quenching mode, the larger the part size is, the quenching deformation is easy to occur, and the plate defects such as wave, warping and the like are easy to occur after water cooling, so that the spliced and welded preliminary bulletproof vehicle shell needs to be structurally reinforced firmly before quenching, the shape change of the external plate of the bulletproof vehicle is prevented in the subsequent heat treatment process.
Step 40: and carrying out heat treatment on the whole of the shell of the reinforced bulletproof vehicle to obtain a finished product of the shell of the bulletproof vehicle.
Further, the step of performing heat treatment on the reinforced bulletproof vehicle shell integrally to obtain a bulletproof vehicle shell finished product comprises the following steps: the reinforced bulletproof vehicle shell is subjected to heat preservation for 10-30min at the quenching heating temperature of 850 ℃ and 950 ℃; when the quenching temperature is between 150 ℃ and 350 ℃, carrying out low-temperature tempering, and keeping the temperature for 20-60 min; cooling along with the furnace or taking the steel plate out of the furnace for air cooling; after the reinforced bulletproof vehicle shell is cooled to room temperature, cutting and polishing the welding seam connection point of the reinforced steel plate and the bulletproof plate; and (4) disassembling the reinforced steel plate to obtain the bulletproof vehicle shell finished product.
Further, the quenching medium is water quenching or oil quenching.
Specifically, the reinforced bulletproof vehicle shell formed by structure reinforcement is subjected to integral heat treatment, the heat treatment adopts an immersion quenching mode, the reinforced bulletproof vehicle shell is firstly subjected to heat preservation for 10-30 minutes at a heating temperature of 850-; the water quenching is quenching by taking water as a quenching agent, has the advantages that the cooling is faster in a high-temperature area, and for steel grades with higher carbon content and strong hardenability, oil quenching is selected, so that the residual stress of the whole structure after quenching can be reduced and the plate shape can be controlled. And then carrying out low-temperature tempering after quenching to room temperature, wherein the tempering temperature is 150-350 ℃, and the temperature is kept for 20-60 minutes, the tempering can properly prolong the heat preservation time, release the residual stress, and avoid cracking of the subsequent bulletproof car shell due to stress concentration. And then cooling, namely selecting furnace cooling or discharging and air cooling along with air. And finally, after the reinforced bullet-proof vehicle shell is cooled to room temperature, cutting and polishing the welding seam connection point of the reinforced steel plate and the bullet-proof plate, and detaching the reinforced steel plate to finally obtain the bullet-proof vehicle shell finished product. The bulletproof car shell finished product obtained through the steps of the embodiment of the invention meets the requirement of the overall bulletproof performance of the bulletproof car shell, is suitable for manufacturing various bulletproof car shells, is suitable for 1-2 protection of the North about 4569 bulletproof standard and the protection of corresponding levels of other European, American and national military standard bulletproof plates, effectively solves the technical problem that the bulletproof performance of a welding seam position is weakened due to tailor welding in the manufacturing process of a bulletproof car, achieves the protection performance of a welding seam joint which is equivalent to that of a parent metal bulletproof plate after heat treatment, greatly improves the overall safety of the bulletproof car, avoids deformation in the heat treatment process by adopting structural reinforcement, and solves the technical effects of residual stress and improving the plastic toughness of materials by long-time low-temperature tempering.
Further, the bulletproof plate comprises the following chemical components in percentage by weight: 0.20-0.45%; si: 0.20-0.80%; mn: 1.0-1.8%; nb: 0 to 0.06 percent; mo: 0.4-1.0%; v: 0 to 0.10 percent; ti: 0 to 0.08 percent; al: 0.01-0.06%; ni: 0 to 3.0 percent; cu: 0 to 1.0 percent; w: 0 to 2.0 percent; p: less than or equal to 0.010 percent; s: less than or equal to 0.004 percent; n: less than or equal to 0.008 percent; the balance of Fe and inevitable impurities.
Furthermore, the strength grade of the bulletproof plate is 1500MPa-2000 MPa.
Specifically, the strength grade of the bulletproof plate used in the embodiment of the invention is 1500-2000 MPa, the requirement of bulletproof performance of a bulletproof vehicle is met, and meanwhile, the bulletproof plate uses steel with the chemical components of, by weight: 0.20-0.45%; si: 0.20-0.80%; mn: 1.0-1.8%; nb: 0 to 0.06 percent; mo: 0.4-1.0%; v: 0 to 0.10 percent; ti: 0 to 0.08 percent; al: 0.01-0.06%; ni: 0 to 3.0 percent; cu: 0 to 1.0 percent; w: 0 to 2.0 percent; p: less than or equal to 0.011 percent; s: less than or equal to 0.004 percent; n: less than or equal to 0.008 percent; the balance of Fe and inevitable impurities. When the cut bulletproof plate is welded in step 20, a welding wire for argon arc welding is used, namely the bulletproof plate is made of a material with the same chemical composition, and the production requirement of the bulletproof vehicle shell with the integral protection performance of the bulletproof vehicle is met through the high-strength level of the bulletproof plate. Example two
According to the bulletproof vehicle shell provided by the embodiment of the invention, the bulletproof vehicle shell is processed and manufactured by the method of the first embodiment.
Firstly, cutting the bulletproof plate according to the size of the shell of the bulletproof vehicle, wherein a laser cutting or underwater plasma cutting method is adopted, so that the thermal stress influence on the bulletproof plate is reduced, and the deformation is avoided; then, welding wires with the same components as those of the base metal are adopted for welding the cut bulletproof plate, the welding can adopt laser welding or argon arc welding, and the welding is carried out by using the same material as the bulletproof plate, so that the protective performance equivalent to that of the base metal, namely the bulletproof plate, can be achieved, and the shell of the primary bulletproof vehicle can have stable bulletproof performance during subsequent heat treatment, thereby solving the technical problem that in the prior art, in the welding process of a steel plate, namely the bulletproof plate, the temperature rise influence caused by welding heat input on a welding seam and a heat affected zone is caused, the organization and precipitation change, and the bulletproof performance at the position of a welding seam joint is greatly reduced; secondly, the primary bulletproof vehicle shell is structurally reinforced by using a reinforced steel plate made of a steel plate with the thickness of more than or equal to 8mm, the reinforcing distance is not more than 20cm, the reinforcing effect is ensured, the reinforced bulletproof vehicle shell is formed, the shell of the bulletproof vehicle is prevented from quenching deformation during the heat treatment in the next step, and the quality of the bulletproof vehicle shell is ensured; and then carrying out heat treatment on the whole of the reinforced bulletproof vehicle shell: the heat treatment adopts an immersion quenching mode, the reinforced bulletproof car shell is subjected to heat preservation for 10-30 minutes at the heating temperature of 850-950 ℃, the heat treatment process is an important step for ensuring that the performance of the bulletproof car shell reaches the protection index, the quenching heating and heat preservation select 850-950 ℃ according to the used chemical component system and the alloy addition amount, the full austenitization is ensured, the austenite grain size is controlled, the heat preservation time selects 10-30 minutes according to the thickness, the used quenching medium is water quenching or oil quenching, the oil quenching uses oil as a quenching agent, and when the temperature is heated to a certain temperature above the phase transformation point, the heat preservation is carried out for a proper time, and then the quenching is carried out in oil; the water quenching is quenching by taking water as a quenching agent, has the advantages that the cooling is faster in a high-temperature area, and for steel grades with higher carbon content and strong hardenability, oil quenching is selected, so that the residual stress of the whole structure after quenching can be reduced and the plate shape can be controlled. And then carrying out low-temperature tempering after quenching to room temperature, wherein the tempering temperature is 150-350 ℃, and the temperature is kept for 20-60 minutes, the tempering can properly prolong the heat preservation time, release the residual stress, and avoid cracking of the subsequent bulletproof car shell due to stress concentration. And then cooling, namely selecting furnace cooling or discharging and air cooling along with air. And finally, after the reinforced bullet-proof vehicle shell is cooled to room temperature, cutting and polishing the welding seam connection point of the reinforced steel plate and the bullet-proof plate, and detaching the reinforced steel plate to finally obtain the bullet-proof vehicle shell finished product.
The bulletproof vehicle provided by the embodiment of the invention has the bulletproof performance equivalent to that of a bulletproof plate used in a weld joint, ensures that the performance of the shell of the bulletproof vehicle reaches the protection index, and greatly improves the overall safety in the prior art. And then solved among the prior art the bulletproof performance of welding seam joint position and declined by a wide margin, the breakdown phenomenon takes place for the target practice test, is difficult to satisfy the technical problem of shellproof car overall protection demand. The protective performance equivalent to that of the bulletproof plate is achieved after the weld joint of the bulletproof vehicle is subjected to heat treatment, so that the overall safety of the bulletproof vehicle is greatly improved, and the technical effect of meeting the requirement of the overall bulletproof performance is achieved.
EXAMPLE III
In order to illustrate the invention more clearly, the following examples illustrate the actual production process of the method for producing a bulletproof vehicle outer shell and the test results of the overall performance of the bulletproof material.
The chemical components of the bulletproof plate used by the bulletproof vehicle shell of the embodiment of the invention are as follows by weight percent: c: 0.20-0.45%; si: 0.20-0.80%; mn: 1.0-1.8%; nb: 0 to 0.06 percent; mo: 0.4-1.0%; v: 0 to 0.10 percent; ti: 0 to 0.08 percent; al: 0.01-0.06%; ni: 0 to 3.0 percent; cu: 0 to 1.0 percent; w: 0 to 2.0 percent; p: less than or equal to 0.011 percent; s: less than or equal to 0.004 percent; n: less than or equal to 0.008 percent; the balance of Fe and inevitable impurities.
In the embodiment of the invention, the ultrahigh-strength bulletproof plate meeting the requirement of the chemical components of the bulletproof plate is selected for specific production, and the chemical components of the bulletproof plate are shown in the following table 1 in percentage by weight.
TABLE 1
As an alternative example, the following is a description of the respective components:
C
one of the most economical strengthening elements in the steel ensures the strength of the material, enhances the solid solution strengthening and improves the yield strength by controlling the content of C.
The percentage content of C content in this embodiment may include the following percentage contents, and the C content listed in this embodiment is only an example and is not limited otherwise.
The percentage content of C content may include the following ranges: 0.20 to 0.33%, 0.20 to 0.38%, 0.20 to 0.42%, 0.20 to 0.45%; 0.22-0.33%, 0.22-0.38%, 0.22-0.42%, 0.22-0.45%; 0.33 to 0.38%, 0.33 to 0.42%, 0.33 to 0.45%; 0.38-0.42%, 0.38-0.45%; 0.42-0.45%.
Si
Is a deoxidizing element and is subjected to solid solution strengthening in the steel, so that the strength of the steel is ensured.
The percentage content of the Si content in the present embodiment may include the following percentage contents, and the Si content listed in the present embodiment is only an example and is not limited otherwise.
The percentage content of Si content may include the following ranges: 0.20 to 0.31%, 0.20 to 0.34%, 0.20 to 0.50%, 0.20 to 0.60%, 0.20 to 0.80%; 0.31 to 0.34%, 0.31 to 0.50%, 0.31 to 0.60%, 0.31 to 0.80%; 0.33 to 0.50%, 0.33 to 0.60%, 0.33 to 0.80%; 0.34-0.50%, 0.34-0.60%, 0.34-0.80%; 0.50-0.60%, 0.50-0.80%; 0.60-0.80%. Mn is dissolved in a solid solution to strengthen elements, so that the yield strength is improved, and the toughness is ensured.
The percentage contents of the Mn content in this embodiment may include the following components, and the Mn content listed in this embodiment is only an example and is not otherwise limited.
The percentage content of Mn content may include the following ranges: 1.0-1.1%, 1.0-1.26%, 1.0-1.3%, 1.0-1.45%, 1.0-1.80%; 1.1-1.26%, 1.1-1.3%, 1.1-1.45%, 1.1-1.80%; 1.26-1.3%, 1.26-1.45% and 1.26-1.80%; 1.3-1.45% and 1.3-1.8%; 1.45-1.80%.
P
If the content of the impurity element in the steel is too high, the weldability and formability of the steel are lowered and controlled to be within 0.011%.
The percentage content of the P content in this embodiment may include the following percentage contents, and the P content listed in this embodiment is only for example and is not limited otherwise.
The percentage content of P content may include the following ranges: 0-0.008%, 0-0.009%, 0-0.010%, 0-0.011%; 0.008-0.009%, 0.008-0.010%, 0.008-0.011%; 0.009-0.010% and 0.009-0.011%; 0.010-0.011 percent.
S
Impurity elements in the steel influence the low-temperature toughness of the steel and are controlled within 0.004 percent.
The percentage content of the S content in this embodiment may include the following percentage contents, and the S content listed in this embodiment is only an example and is not limited otherwise.
The percentage content of S content may include the following ranges: 0 to 0.001%, 0 to 0.002%, 0 to 0.004%; 0.001-0.002%, 0.001-0.004%; 0.002-0.004%.
N
The dissolved N can improve the strength, the plasticity and the toughness of the material can be seriously deteriorated if the content is too high, and particularly for heat-treated high-strength steel, the content is controlled to be less than or equal to 0.008 percent.
The percentage content of the N content in this embodiment may include the following percentage contents, and the N content listed in this embodiment is only for example and is not limited otherwise.
The percentage content of the N content may include the following ranges: 0-0.003%, 0-0.004%, 0-0.008%; 0.003-0.004%, 0.003-0.008%; 0.004-0.008%.
Ti
And (3) fixing nitrogen, reducing free N in steel by forming TiN, improving the service performance of the material, combining redundant Ti with C to play a role in precipitation strengthening, and the precipitation strengthening of TiC can cause loss of low-temperature impact toughness of the material, so that the upper limit needs to be controlled to be 0-0.08%.
The percentage content of Ti content in this embodiment may include the following percentage contents of the components, and the Ti content listed in this embodiment is only an example and is not otherwise limited.
The percentage content of Ti content may include the following ranges: 0-0.025%, 0-0.027%, 0-0.030%, 0-0.08%; 0.025-0.027%, 0.025-0.030%, 0.025-0.08%; 0.027-0.030% and 0.027-0.08%; 0.030 to 0.08 percent.
Nb
The second phase forming element exerts a precipitation strengthening action, and has an action of suppressing recovery of austenite and grain growth of recrystallization in the hot rolling step to make the ferrite phase a desired particle size, and the second phase particles belong to a hard phase to increase the wear resistance of the matrix.
The percentage content of Nb in this embodiment may include the following percentage contents, and the Nb content listed in this embodiment is only an example and is not otherwise limited.
The percentage content of Nb content may include the following ranges: 0-0.030%, 0-0.035%, 0-0.038%, 0-0.06%; 0.030-0.035%, 0.030-0.038%, 0.030-0.06%; 0.035-0.038%, 0.035-0.06%; 0.038-0.06%.
V
The second phase forming element plays a role in precipitation strengthening, and a certain amount of V improves the strength of an incomplete recrystallization zone of welding.
The percentage content of V content in this embodiment may include the following percentage contents, and the V content in this embodiment is only for example and not for other limitation.
The percentage content of V content may include the following ranges: 0 to 0.05%, 0 to 0.07%, 0 to 0.08%, 0 to 0.1%; 0.05-0.07%, 0.05-0.08%, 0.05-0.1%; 0.07-0.08%, 0.07-0.1%; 0.08 to 0.1 percent.
Cu
The composite addition is strengthened, and the integral strength of the material is improved.
The percentage content of the Cu content in the present embodiment may include the following percentage contents, and the Cu content listed in the present embodiment is only an example and is not limited otherwise.
The percentage content of Cu content may include the following ranges: 0 to 0.25%, 0 to 0.5%, 0 to 0.6%, 0 to 1.0%; 0.25-0.5%, 0.25-0.6%, 0.25-1.0%; 0.5-0.6%, 0.5-1.0%; 0.6 to 1.0 percent.
W
The strength, heat resistance and tempering stability of the bulletproof plate can be improved, the growth of steel grains during quenching is reduced, and the performance of a welded joint is improved.
The percentage content of the W content in this embodiment may include the following percentage contents, and the W content listed in this embodiment is only an example and is not limited otherwise.
The percentage content of W content may include the following ranges: 0-0.5%, 0-0.9%, 0-1.1%, 0-2.0%; 0.5-0.9%, 0.5-1.1%, 0.5-2.0%; 0.9-1.1%, 0.9-2.0%; 1.1 to 2.0 percent.
Mo
Improving the hardenability of the material, controlling the heat treatment cooling structure, refining grains and improving the plasticity and strength of the material.
The percentage content of the Mo content in this embodiment may include the following percentage contents, and the Mo content in this embodiment is only an example and is not limited otherwise.
The percentage content of Mo content may include the following ranges: 0.4-0.5%, 0.4-0.65%, 0.4-0.8%, 0.4-1.0%; 0.5-0.65%, 0.5-0.8%, 0.5-1.0%; 0.65-0.8%, 0.65-1.0%; 0.8 to 1.0 percent.
Ni
The composite addition strengthens, improves the strength, the bulletproof performance of the material and the performance of the welding joint.
The percentage content of the Ni content in the present embodiment may include the following percentage contents, and the Ni content listed in the present embodiment is only an example and is not limited otherwise.
The percentage content of Ni content may include the following ranges: 0-0.6%, 0-0.8%, 0-1.0%, 0-3.0%; 0.6-0.8%, 0.6-1.0%, 0.6-3.0%; 0.8-1.0% and 0.8-3.0%; 1.0 to 3.0 percent.
It can be seen from the above description that the ranges of percentage content of each component in the embodiment can be at least any combination of the above ranges, and the ranges of percentage content in the embodiment of the present invention, other than the listed ranges, which are not listed but included in the embodiments of the present invention, should also fall within the protection scope of the embodiments of the present invention.
The production of the bulletproof vehicle shell comprises the following steps:
firstly, the cutting and blanking mode of the outer plate used by the bulletproof vehicle adopts laser cutting or underwater plasma cutting, so that the deformation of the steel plate after cutting is avoided.
And then, cutting the blanked bulletproof plate, and carrying out butt welding forming by adopting a laser welding or argon arc welding mode, wherein the No. 1 No. 2 No. 3 bulletproof plate with the chemical composition of the table 1 is formed by adopting laser welding butt joint, the No. 4 and No. 5 bulletproof plates are formed by adopting argon arc welding butt joint, and a welding wire is made of the same chemical composition material as the bulletproof plate.
And then, structurally reinforcing the bulletproof vehicle shell to prevent quenching deformation, welding a transverse and vertical crossed reinforcing piece in a shape like a Chinese character jing by using a reinforcing material of 10mm thick steel plate and low alloy steel, wherein the distance between the reinforcing piece and the steel plate is 10-15cm, and spot-welding the reinforcing piece to the bulletproof vehicle shell.
And finally, performing integral heat treatment after welding forming and reinforcing, wherein the heat treatment adopts an immersion quenching and low-temperature tempering process, the quenching heating temperature is 850-. And cutting and polishing the welding seam connection point of the reinforcing member of the integral structure and the bulletproof plate after No. 1-5 tempering, and removing the structural reinforcing member to obtain a finished bulletproof vehicle shell.
The specific production process of the heat treatment of No. 1-5 is shown in a table 2:
TABLE 2
The target practice test was performed on the bulletproof car cases made of the number 1-5 bulletproof plates, and the specific target practice and results are shown in table 3 below:
TABLE 3
The bulletproof car shell production method provided by the embodiment of the invention effectively solves the problem that the bulletproof performance of the welding seam position is weakened due to tailor welding in the process of manufacturing the bulletproof car by using the ultrahigh-strength bulletproof plate, the welding seam joint reaches the equivalent bulletproof performance of the parent metal bulletproof plate after heat treatment, the shooting test result is good, and the overall safety of the bulletproof car is greatly improved. Through adopting structural reinforcement, avoid the deformation in the heat treatment process to solve residual stress and improve the plasticity and toughness of material through long-time low temperature tempering. The process provided by the embodiment of the invention is suitable for manufacturing various bulletproof vehicle shells and is suitable for the protection of the 1-2 level of the North about 4569 bulletproof standard and the protection of the corresponding level of European, American and national military standard bulletproof plates.
The technical scheme provided in the embodiment of the application at least has the following technical effects or advantages:
1. in an embodiment of the present invention, a method for producing a bulletproof vehicle outer shell is provided, where the method includes: the bulletproof plate is cut according to the size of the shell of the bulletproof vehicle, so that the influence of thermal stress on the bulletproof plate is reduced, and deformation is avoided; welding the cut bulletproof plate, wherein the welding wire for welding has the same composition with the bulletproof plate, and the welding wire is made of the same material as the bulletproof plate, so that the protection performance equivalent to that of a base material, namely the bulletproof plate, can be achieved, and the manufactured primary bulletproof vehicle shell has stable bulletproof performance during subsequent heat treatment, thereby solving the technical problem that in the prior art, in the welding process of a steel plate, namely the bulletproof plate, the welding seam and a heat affected zone are influenced by temperature rise due to welding heat input, and the bulletproof performance at the joint position of the welding seam is greatly reduced due to changes in organization and precipitation; (ii) a Then, structurally reinforcing the primary bulletproof vehicle shell to form a reinforced bulletproof vehicle shell, and avoiding quenching deformation of the bulletproof vehicle shell during heat treatment in the next step, so that the quality of the bulletproof vehicle shell is ensured; and then the reinforced bulletproof vehicle shell is subjected to heat treatment, so that the weld joint reaches the bulletproof performance equivalent to that of the used bulletproof plate after the heat treatment, the bulletproof vehicle shell is ensured to reach the protection index, the residual stress is solved, the plastic toughness of the material is improved, and the overall safety of the obtained bulletproof vehicle shell finished product is greatly improved. And then solved among the prior art the bulletproof performance of welding seam joint position and declined by a wide margin, the breakdown phenomenon takes place for the target practice test, is difficult to satisfy the technical problem of shellproof car overall protection demand. The protective performance equivalent to that of the bulletproof plate is achieved after the weld joint of the bulletproof vehicle is subjected to heat treatment, so that the overall safety of the bulletproof vehicle is greatly improved, and the technical effect of meeting the requirement of the overall bulletproof performance is achieved.
2. According to the bulletproof vehicle shell provided by the embodiment of the invention, the bulletproof plate is cut according to the size of the bulletproof vehicle shell by a production method, wherein the laser cutting or underwater plasma cutting method is adopted, so that the thermal stress influence on the bulletproof plate is reduced, and the deformation is avoided; welding wires with the same components as those of the base metal are adopted for welding the cut bulletproof plate, the welding can adopt laser welding or argon arc welding, and the welding is carried out by using the same material as the bulletproof plate, so that the protective performance equivalent to that of the base metal, namely the bulletproof plate, can be achieved, and the shell of the primary bulletproof vehicle can have stable bulletproof performance during subsequent heat treatment, thereby solving the technical problem that the bulletproof performance at the joint position of a welding seam is greatly reduced due to the fact that the welding seam and a heat affected zone are influenced by temperature rise caused by welding heat input and the organization and precipitation are changed in the welding process of a steel plate, namely the bulletproof plate in the prior art; then, the primary bulletproof vehicle shell is structurally reinforced by using a reinforced steel plate made of a steel plate with the thickness of more than or equal to 8mm, the reinforcing distance is not more than 20cm, the reinforcing effect is ensured, the reinforced bulletproof vehicle shell is formed, the shell of the bulletproof vehicle is prevented from quenching deformation during the heat treatment in the next step, and the quality of the bulletproof vehicle shell is ensured; and then carrying out heat treatment on the whole shell of the reinforced bulletproof vehicle, wherein the heat treatment adopts an immersion quenching mode, the shell of the reinforced bulletproof vehicle is subjected to heat preservation for 10-30 minutes at a heating temperature of 850-. And then cooling, namely selecting furnace cooling or discharging and air cooling along with air. And finally, after the reinforced bullet-proof vehicle shell is cooled to room temperature, cutting and polishing the welding seam connection point of the reinforced steel plate and the bullet-proof plate, and detaching the reinforced steel plate to finally obtain the bullet-proof vehicle shell finished product. The bulletproof vehicle has the bulletproof performance equivalent to that of a bulletproof plate used in a weld joint, ensures that the shell performance of the bulletproof vehicle reaches the protection index, solves the residual stress and improves the plastic toughness of the material, thereby greatly improving the overall safety of the obtained shell finished product of the bulletproof vehicle. And then solved among the prior art the bulletproof performance of welding seam joint position and declined by a wide margin, the breakdown phenomenon takes place for the target practice test, is difficult to satisfy the technical problem of shellproof car overall protection demand. The protection performance of the weld joint of the bulletproof vehicle is equivalent to that of a bulletproof plate, so that the overall safety of the bulletproof vehicle is greatly improved, and the technical effect of meeting the requirement of the overall bulletproof performance is achieved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (5)
1. A method of producing a ballistic resistant vehicle skin, the method comprising:
cutting the bulletproof plate according to the size of the shell of the bulletproof vehicle;
welding the cut bulletproof plate to manufacture a preliminary bulletproof vehicle shell;
carrying out structural reinforcement on the primary bulletproof vehicle shell to form a reinforced bulletproof vehicle shell;
carrying out heat treatment on the whole of the shell of the reinforced bulletproof vehicle to obtain a finished shell of the bulletproof vehicle;
the cutting of the bulletproof plate is carried out in a laser welding mode or an argon arc welding mode, and when the argon arc welding mode is adopted, the welding wire for welding is the same as the bulletproof plate in composition;
wherein, the structural reinforcement of the preliminary bulletproof vehicle shell comprises:
a steel plate with the thickness of more than or equal to 8mm is adopted to manufacture a reinforced steel plate, and the welding distance of the reinforced steel plate is less than or equal to 20 cm;
welding the reinforced steel plate to the primary bulletproof vehicle shell to obtain the reinforced bulletproof vehicle shell;
wherein, the integral heat treatment of the reinforced bulletproof vehicle shell to obtain a bulletproof vehicle shell finished product comprises the following steps:
the reinforced bulletproof vehicle shell is subjected to heat preservation for 10-30min at the quenching heating temperature of 850 ℃ and 950 ℃;
when the quenching temperature is between 150 ℃ and 350 ℃, carrying out low-temperature tempering, and keeping the temperature for 20-60 min;
cooling along with the furnace or taking the steel plate out of the furnace for air cooling;
after the reinforced bulletproof vehicle shell is cooled to room temperature, cutting and polishing the welding seam connection point of the reinforced steel plate and the bulletproof plate;
the reinforced steel plate is disassembled to obtain a finished product of the bulletproof vehicle shell;
the bulletproof plate comprises the following chemical components in percentage by weight: 0.20-0.45%; si: 0.20-0.80%; mn: 1.0-1.8%; nb: 0 to 0.06 percent; mo: 0.4-1.0%; v: 0 to 0.10 percent; ti: 0 to 0.08 percent; al: 0.01-0.06%; ni: 0 to 3.0 percent; cu: 0 to 1.0 percent; w: 0 to 2.0 percent; p: less than or equal to 0.011 percent; s: less than or equal to 0.004 percent; n: less than or equal to 0.008 percent; the balance of Fe and inevitable impurities.
2. The method of claim 1, wherein the ballistic panel has a strength rating of 1500MPa to 2000 MPa.
3. The method of claim 1, wherein the quenching medium is water quenching or oil quenching.
4. The method of claim 1, wherein the ballistic panel is cut according to the dimensions of the ballistic shell, and the cutting method is laser cutting or underwater plasma cutting.
5. A ballistic resistant vehicle body shell, characterized in that it is obtained using the method according to any one of the preceding claims 1-4.
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| DE19729485A1 (en) * | 1997-07-10 | 1999-01-14 | Volkswagen Ag | Process for the production of a motor vehicle body by means of laser welding and motor vehicle body |
| US8388787B2 (en) * | 2009-07-17 | 2013-03-05 | Gentex Corporation | Method of making a composite sheet |
| PL2704938T3 (en) * | 2011-05-04 | 2016-07-29 | Bombardier Transp Gmbh | Rail vehicle body shell and method for manufacturing same |
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