CN113941833A - Manufacturing process of high manganese steel material shell ring - Google Patents
Manufacturing process of high manganese steel material shell ring Download PDFInfo
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- CN113941833A CN113941833A CN202111339889.2A CN202111339889A CN113941833A CN 113941833 A CN113941833 A CN 113941833A CN 202111339889 A CN202111339889 A CN 202111339889A CN 113941833 A CN113941833 A CN 113941833A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
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- 238000005520 cutting process Methods 0.000 claims description 47
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
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- 239000003949 liquefied natural gas Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 1
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- 229910000831 Steel Inorganic materials 0.000 description 1
- QFGIVKNKFPCKAW-UHFFFAOYSA-N [Mn].[C] Chemical compound [Mn].[C] QFGIVKNKFPCKAW-UHFFFAOYSA-N 0.000 description 1
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- 229910052748 manganese Inorganic materials 0.000 description 1
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- 229910000734 martensite Inorganic materials 0.000 description 1
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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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Abstract
The invention provides a manufacturing process of a high manganese steel shell ring, which is characterized in that straight edge sections are reserved at two unfolded ends of the shell ring respectively in the shell ring blanking step and are used for coping with the characteristic of high yield of the high manganese steel. Meanwhile, before the cylinder section and the winding drum are welded, the straight edge section is pre-bent, so that the two ends of the unfolded cylinder section are bent before the cylinder section is rolled, and then the pre-bent straight edge section is cut off, so that the cylinder section is rolled according to the size of the cylinder section. Because the two ends of the cylindrical shell section which are unfolded are pre-bent before welding, the cylindrical shell section does not need to be subjected to circle correction after the cylindrical shell section is welded and formed, and stress generated by the circle correction is not needed to be subjected to post-welding elimination treatment, so that the forming quality and the forming precision of the cylindrical shell section are ensured, the operation steps of manufacturing the cylindrical shell section are effectively reduced, and the production efficiency of manufacturing the cylindrical shell section is improved.
Description
Technical Field
The invention relates to the technical field of shell ring manufacturing, in particular to a manufacturing process of a high manganese steel shell ring.
Background
At present, raw materials for manufacturing liquefied natural gas storage and transportation equipment are Cr-Ni austenitic stainless steel and 9Ni steel with a large amount of nickel. Because the nickel resource is less in China, the price of the material containing nickel is 2-3 times of that of manganese carbon steel, the LNG storage and transportation equipment manufactured by adopting the novel austenite high manganese steel material can obviously reduce the manufacturing cost and can adapt to the condition of manganese-rich and nickel-poor mineral resources in China.
Under the condition of room temperature, the strength performance of the high manganese steel is far higher than that of Cr-Ni austenitic stainless steel, the original structure hardness of the high manganese steel material after water toughening treatment is about 230HB, the deformation layer can generate a work hardening phenomenon after bending, the austenite structure of the deformation layer is changed into martensite, and the highest hardness value of the deformation layer can reach 500HB-800 HB. By adopting the original process method for manufacturing the shell ring by using the austenitic stainless steel, the high manganese steel plate cannot reach the shell ring manufacturing precision due to large material resilience and difficult forming, and the shell ring forming quality is influenced.
Disclosure of Invention
The invention aims to solve the technical problems that when the traditional shell ring manufacturing method is adopted to manufacture a shell ring made of high manganese steel, the high manganese steel plate cannot reach the shell ring manufacturing precision due to large resilience and difficult forming of the high manganese steel plate, and the shell ring forming quality is influenced.
In order to solve the technical problem, the invention provides a manufacturing process of a high manganese steel cylindrical shell, which comprises the following steps: blanking the shell ring, wherein the unfolded design length of each shell ring is L0Straight edge sections are reserved at two ends of the unfolded cylinder section, and the length of the reserved straight edge sections at the two ends of the unfolded cylinder section is set to be L1Feeding and discharging a shell ring blank plate on a high manganese steel plate, wherein the length of the shell ring blank plate is L0+2L1(ii) a Pre-bending the straight edge sections, and respectively pre-bending the straight edge sections at the two unfolded ends of the shell ring to enable the straight edge sections to form bending transition at the two unfolded ends of the shell ring; cutting off the straight edge section, and respectively arranging the two ends of the cylindrical shell section which are unfolded along the joint of the straight edge section and the cylindrical shell section with the length of L1Cutting off the straight edge section; rolling the cylindrical shell section, and rolling the cylindrical shell section by unfolding to form a winding drum; and (5) welding the winding drum, and longitudinally welding the winding drum to obtain the shell ring.
Optionally, the length L of the straight-sided segment1Is 300mm-500 mm.
Optionally, the high manganese steel shell ring is used for preparing a storage tank, and two ends of the shell ring are connected with the end sockets; the shell ring blanking further comprises blank plate blanking, the blank plate blanking comprises a blanking dimension line for defining a blank plate on a high manganese steel plate according to the length and the width of the shell ring to be prepared, and the length L of the blank plate is equal to pi (Di + delta n) +2L1+L2Wherein Di is the inner diameter of the end socket, δ n is the wall thickness of the end socket, and L2Is the process allowance.
Optionally, the shell ring blanking further includes fine blanking processing, the fine blanking processing is performed after the blank plate blanking, and the fine blanking processing includes the following steps: measuring the outer perimeter of the seal head, wherein the outer perimeter of the seal head is the designed length L of the cylindrical shell section0(ii) a Blanking a shell ring blank plate corresponding to the blank plate, wherein the length L of the shell ring blank plate3Is L3＝L0+2L1The shell ring blank plate comprises a shell ring unfolding and straight edge sections reserved at two ends of the shell ring unfolding.
Optionally, the flatness of the corresponding blank blanking cut shell section blank is no greater than 1/1000.
Optionally, the manufacturing process further comprises the steps of defining cutting lines and detection lines on the shell section blank plate, wherein the step of defining cutting lines and detection lines on the shell section blank plate is carried out between the steps of blanking the shell section and pre-bending the straight side section; the step of defining cutting lines and detecting lines on the shell section blank plate comprises the following steps: firstly, a cutting line is defined on a shell ring blank plate, the cutting line is a vertical line segment where a straight edge segment and a shell ring unfolding joint are located, the cutting line is two segments, and the cutting line and the shell ring unfolding joint areThe distance between the outer end edges of the adjacent shell ring blank plates is L1(ii) a Defining detection lines on the shell ring blank plate, wherein the detection lines are vertical line segments arranged at equal intervals on the inner sides of the cutting lines, and the vertical distance between each detection line and the adjacent cutting line is L4。
Optionally, in the step of cutting off the straight-edge section, the straight-edge section which is pre-bent is cut on the shell section blank along the cutting line.
Optionally, a detection point is set on each detection line, and the vertical distance L between each detection point and the outer end cutting end face of the shell ring blank plate is measuredMeasuring，LMeasuringHas a precision range of L4±0.5mm。
Optionally, the manufacturing process further comprises nondestructive testing, the nondestructive testing is performed 12 hours after the welding of the winding drum is completed, and the nondestructive testing is performed on the welded drum sections.
Optionally, the welder needs to perform an air extraction process to remove the manganese metal vapor or wear a gas supply mask to prevent the manganese metal vapor from being damaged while performing the drum welding step.
According to the technical scheme, the beneficial effects of the invention are as follows: in the manufacturing process of the high manganese steel cylinder section, straight edge sections are reserved at two unfolded ends of the cylinder section in the cylinder section blanking step and are used for responding to the characteristic of high yield of the high manganese steel material. Meanwhile, before the cylinder section and the winding drum are welded, the straight edge section is pre-bent, so that the two ends of the unfolded cylinder section are bent before the cylinder section is rolled, and then the pre-bent straight edge section is cut off, so that the cylinder section is rolled according to the size of the cylinder section. Because the two ends of the cylindrical shell section which are unfolded are pre-bent before welding, the cylindrical shell section does not need to be subjected to circle correction after the cylindrical shell section is welded and formed, and stress generated by the circle correction is not needed to be subjected to post-welding elimination treatment, so that the forming quality and the forming precision of the cylindrical shell section are ensured, the operation steps of manufacturing the cylindrical shell section are effectively reduced, and the production efficiency of manufacturing the cylindrical shell section is improved.
Drawings
FIG. 1 is a flow chart of the manufacturing process of the high manganese steel material shell ring of the invention.
FIG. 2 is a schematic structural diagram of a blank slab in an embodiment of the process for manufacturing a high manganese steel shell ring according to the present invention.
FIG. 3 is a schematic structural diagram of a shell ring blank plate in an embodiment of the manufacturing process of the high manganese steel shell ring of the present invention.
FIG. 4 is another schematic structural diagram of a shell ring blank according to an embodiment of the present invention.
FIG. 5 is a schematic structural diagram of the welding of the winding drum in an embodiment of the manufacturing process of the high manganese steel shell ring of the present invention.
The reference numerals are explained below: 10. blank plate of blank; 20. nameplate indicia; 30. a shell ring blank plate; 31. unfolding the shell ring; 32. a straight side section; 40. welding a test plate; 50. a cylindrical shell section.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.
Referring to fig. 1, the application provides a manufacturing process of a high manganese steel shell ring, which is suitable for manufacturing the high manganese steel shell ring, and is particularly suitable for manufacturing liquefied natural gas storage and transportation equipment. The manufacturing process comprises the following steps:
s10, blanking the shell ring, wherein the unfolded design length of each shell ring is L0Straight edge sections are reserved at two ends of the unfolded cylinder section, and the length of the reserved straight edge sections at the two ends of the unfolded cylinder section is set to be L1Feeding and discharging shell ring blank plates on the high manganese steel plate, wherein the length of the shell ring blank plate is L0+2L1；
S20, pre-bending the straight edge sections, and pre-bending the straight edge sections at the two unfolded ends of the cylindrical shell section respectively to enable the straight edge sections to form bending transition at the two unfolded ends of the cylindrical shell section;
s30, cutting off the straight edge section, and respectively arranging L lengths at the two ends of the cylindrical shell section along the joint of the straight edge section and the cylindrical shell section1Cutting off the straight edge section;
s40, rolling the shell ring, and rolling the shell ring after being unfolded to form a winding drum;
and S50, welding the winding drum, and longitudinally welding the winding drum to obtain the shell ring.
In this application, high manganese steel material shell ring can be used to the preparation of storage tank, and the storage tank includes shell ring and the head of setting at the shell ring both ends. Wherein, the shell ring is manufactured by the manufacturing process of the application.
In step S10, the shell ring blanking further includes blank blanking. The blanking of the blank plate comprises the step of defining a blanking dimension line of the blank plate on the high manganese steel plate according to the length and the width of the shell ring to be prepared.
As shown in fig. 2, the width of the blank 10 is B, and the length L of the blank 10 is L ═ pi (Di + δ n) +2L1+L2Wherein Di is the inner diameter of the end socket, δ n is the wall thickness of the end socket, and L2Is the process allowance.
The blanking of the blank plate is rough blanking processing, namely, according to the overall dimension of the shell ring and the dimension of the matched end socket, the blank plate 10 with the size required by the corresponding shell ring is scribed and blanked on the raw material high manganese steel plate.
After the corresponding size of the end socket is determined, the length of the straight edge sections reserved at the two ends of the unfolded cylinder section needs to be set. Length L of straight side section1Can be determined by the thickness of the high manganese steel plate, the equipment parameters used in the manufacturing process and the like, and the length L of the straight edge section1Is 300mm-500 mm.
In one embodiment of the present application, the length L of the straight section1300mm and the set process margin is 15 mm. The length of the blank plate 10 with the size required by scribing and blanking the corresponding shell ring on the raw material high manganese steel plate is L ═ pi (Di + δ n) +615 mm.
In addition, a nameplate mark 20 is required to be arranged on the outer wall of the blank plate 10 for recording parameters such as material size of the corresponding shell section. In the view of FIG. 2, name plate indicia 20 is located adjacent the left end of blank 10 and the distance C between name plate indicia 20 and the outer end of blank 10 is 450 mm.
It will be appreciated that the distance between the name plate indicia 20 and the outer end of the blank 10 needs to be greater than the length of the straight edge section to avoid damage or accidental removal of the name plate indicia 20 during the subsequent pre-bending and cutting of the straight edge sections to ensure that the name plate indicia 20 is not damaged.
In the step S10 of shell ring blanking, after blanking of the blank plate, the step of shell ring blanking further includes finish blanking processing, which includes measuring the outer circumference of the end socket and blanking the shell ring blank plate corresponding to the blank plate.
Wherein the step of measuring the outer circumference of the end socket is to set the length L of the cylindrical section for expansion0. In the actual operation process, the alignment mode is middle alignment. Meanwhile, the deviation is removed in the size determination, and in one embodiment of the present application, the deviation is 31 mm.
Blanking the shell ring blank plate corresponding to the blank plate, and considering the deviation, determining the length L of the shell ring blank plate3Is L3＝L0－31mm+2L1. L is set in the above step1Length of (2) is 300mm, length L of shell ring blank3Is L3＝L0－31mm+600mm。
As shown in FIG. 3, the length L of the shell ring blank 303After the length is determined, according to L3A blanking tangent line (ABCD) is defined corresponding to the blank plate, and then the shell ring blank plate 30 is blanked along the line in a gas cutting mode, wherein the flatness of the blank plate in the gas cutting process is within 1/1000.
Further, in the present application, after the blanking of the shell ring blank 30 is completed, before the pre-bending straight edge section in step S20 is performed, the groove is manufactured.
Referring to fig. 3, AC is the bevel edge and BD is the bevel edge. When the groove is manufactured, the end face and the groove are planed according to the size given by the planing process diagram. Wherein, the surface provided with the nameplate mark is the outer surface of the shell ring. The parallelism error of the AC and the BD is not more than 1mm, and the straightness error of the AC and the BD is not more than 1 mm.
The manufacturing process of the present application further comprises the step of defining cutting lines and detection lines on the shell ring blank, the step of defining cutting lines and detection lines on the shell ring blank being performed after the step of groove manufacturing.
Referring to fig. 4, a cut line M is defined on the shell section blank 30, and the cut line M is a vertical line segment where the straight edge segment 32 and the shell section spread 31 are connected. The distance between the cutting line M and the outer end edge of the shell section blank plate adjacent to the cutting line M is L1. In this embodiment, L1Is 300 mm.
Defining a detection line N on the shell ring blank plate 30, wherein the detection line is a vertical line segment arranged at equal intervals on the inner side of the cutting line, and the vertical distance between the detection line N and the adjacent cutting line M is L4. In this embodiment, L is set4Is 200 mm.
After the cutting line M and the detection line N are defined on the shell ring blank 30, the straight side section is pre-bent in step S20. In step S20, the straight-side sections 32 at both ends of the shell section spread 31 are pre-bent, respectively, so that the straight-side sections 32 form a bending transition at both ends of the shell section spread 31. In this embodiment, the roll is made using a three-axis roll, leaving the nameplate indicia 20 on the outer surface of the shell section.
After the pre-bending of the straight section 32 is completed, the step S30 is performed to cut the straight section 32. In the cutting out of the straight-side section at step S30, the 300mm straight-side section 32 having been pre-bent at both ends of the shell section spread 31 is cut out by the manual plasma in accordance with the cutting line M. When cutting, the grinding allowance of 2mm-3mm should be considered. After cutting, the cutting end face is polished to ensure the flatness and smoothness of the end face.
After the straight section 32 is cut off, the distance from the detection line N to the cut end face is measured based on the detection line N. Specifically, a plurality of detection points are set on each detection line, and then the vertical distance L between each detection point and the outer end cutting end face is measuredMeasuring。
LMeasuringThe required measurement size of (D) is 200mm +/-0.5 mm, if LMeasuringIf the requirements of the range are not met, the cutting end face needs to be polished until the detection requirements are met.
Further, after the straight edge section is cut off and the cut end face is detected, step S40 is performed to roll the shell ring, and the shell ring is unfolded to be uniform, so as to form a winding drum.
In the rolling of the cylindrical section in step S40, the rolling is performed using the three-axis roller. The groove directions of the bevel edges AC and BD are required to be rolled according to the edge planing process layout. Meanwhile, the nameplate mark is kept on the outer surface of the cylinder section during rolling.
After the shell ring is rolled, the detection sample plate can be used for detecting the longitudinal seam joint of the shell ring, and the joint can meet the roundness requirement.
And (5) after the shell ring is rolled, carrying out step S50 reel welding, specifically, longitudinally welding the reel to obtain the shell ring.
In step S50, welding is performed by tack welding. Butt-joint welding seam pairing, and the butt-joint distance and the butt-joint misalignment amount must meet the following regulations: the assembly gap is not more than 2mm, and the requirement on the misalignment amount is not more than 2 mm.
When welding the reel, as shown in fig. 5, the welding test plate 40 must be welded simultaneously with the cylindrical shell 50 at the extended portion of the longitudinal weld S of the cylindrical shell 50. If manual welding is adopted for welding the shell ring, an arc striking plate is not needed. When welding seams are welded, an auxiliary tool can be used for supporting the assembly of the longitudinal seams of the shell ring, and the adverse effect of the gravity of a workpiece on welding deformation is reduced.
In addition, to the shell ring of the high manganese steel material of this application, in welding process, the welder need carry out the processing of bleeding in order to get rid of manganese metal steam, perhaps wears the air feed face guard in order to prevent the damage of manganese metal steam, guarantees welding jobs's security.
In the applied manufacturing process of the high manganese steel shell ring, after the shell ring is welded, nondestructive detection can be carried out on the shell ring.
Nondestructive testing is carried out after the welding of the winding drum is finished for 12 hours, so that the situation that the detection accuracy is influenced by the generation of tiny surface cracks in 12 hours after the welding of the high manganese steel welding seam is avoided, the omission is prevented, and the manufacturing quality of the shell ring is ensured. The nondestructive inspection is to perform nondestructive inspection on the welded shell ring, and the nondestructive inspection can be in the modes of radiographic inspection, ultrasonic inspection, magnetic powder, penetration, eddy current inspection and the like.
For the manufacturing process of the high manganese steel shell ring, straight edge sections are reserved at two unfolded ends of the shell ring respectively in the shell ring blanking step and are used for responding to the characteristic of high yield of the high manganese steel. Meanwhile, before the cylinder section and the winding drum are welded, the straight edge section is pre-bent, so that the two ends of the unfolded cylinder section are bent before the cylinder section is rolled, and then the pre-bent straight edge section is cut off, so that the cylinder section is rolled according to the size of the cylinder section. Because the two ends of the cylindrical shell section which are unfolded are pre-bent before welding, the cylindrical shell section does not need to be subjected to circle correction after the cylindrical shell section is welded and formed, and stress generated by the circle correction is not needed to be subjected to post-welding elimination treatment, so that the forming quality and the forming precision of the cylindrical shell section are ensured, the operation steps of manufacturing the cylindrical shell section are effectively reduced, and the production efficiency of manufacturing the cylindrical shell section is improved.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. The manufacturing process of the high manganese steel shell ring is characterized by comprising the following steps:
blanking the shell ring, wherein the unfolded design length of each shell ring is L0Straight edge sections are reserved at two ends of the unfolded cylinder section, and the length of the reserved straight edge sections at the two ends of the unfolded cylinder section is set to be L1Feeding and discharging a shell ring blank plate on a high manganese steel plate, wherein the length of the shell ring blank plate is L0+2L1；
Pre-bending the straight edge sections, and respectively pre-bending the straight edge sections at the two unfolded ends of the shell ring to enable the straight edge sections to form bending transition at the two unfolded ends of the shell ring;
cutting off the straight edge section, along the joint between the straight edge section and the cylindrical shell section, respectively spreading at the cylindrical shell sectionLength of both end pairs is L1Cutting off the straight edge section;
rolling the cylindrical shell section, and rolling the cylindrical shell section by unfolding to form a winding drum;
and (5) welding the winding drum, and longitudinally welding the winding drum to obtain the shell ring.
2. The process of claim 1, wherein the length L of the straight section is equal to the length L of the straight section1Is 300mm-500 mm.
3. The manufacturing process of the high manganese steel shell ring according to claim 1, wherein the high manganese steel shell ring is used for preparing a storage tank, and two ends of the shell ring are used for being connected with end sockets;
the shell ring blanking further comprises blank plate blanking, the blank plate blanking comprises a blanking dimension line for defining a blank plate on a high manganese steel plate according to the length and the width of the shell ring to be prepared, and the length L of the blank plate is equal to pi (Di + delta n) +2L1+L2Wherein Di is the inner diameter of the end socket, δ n is the wall thickness of the end socket, and L2Is the process allowance.
4. The manufacturing process of the high manganese steel shell ring according to claim 3, wherein said shell ring blanking further comprises a fine blanking process, said fine blanking process being performed after blanking of said blank slab, said fine blanking process comprising the steps of:
measuring the outer perimeter of the seal head, wherein the outer perimeter of the seal head is the designed length L of the cylindrical shell section0；
Blanking a shell ring blank plate corresponding to the blank plate, wherein the length L of the shell ring blank plate3Is L3＝L0+2L1The shell ring blank plate comprises a shell ring unfolding and straight edge sections reserved at two ends of the shell ring unfolding.
5. The process of claim 4, wherein the flatness of the slab of the high manganese steel shell ring cut from the slab of the billet is no greater than 1/1000.
6. The process of claim 1, further comprising defining cutting lines and inspection lines on the shell ring blank, the step of defining cutting lines and inspection lines on the shell ring blank being performed between the steps of blanking the shell ring and pre-bending the straight side sections; the step of defining cutting lines and detecting lines on the shell section blank plate comprises the following steps:
firstly, a cutting line is defined on a shell ring blank plate, the cutting line is a vertical line section where a straight edge section and a shell ring unfolding connection part are located, the cutting line is two sections, and the distance between the cutting line and the outer end edge of the adjacent shell ring blank plate is L1(ii) a Defining detection lines on the shell ring blank plate, wherein the detection lines are vertical line segments arranged at equal intervals on the inner sides of the cutting lines, and the vertical distance between each detection line and the adjacent cutting line is L4。
7. The process of manufacturing a shell ring of high manganese steel according to claim 6, wherein in the step of cutting out straight-edged sections, straight-edged sections that have been pre-bent are cut on the shell ring blank along the cutting lines.
8. The process for producing a shell ring of high manganese steel according to claim 7, wherein a detection point is set on each of said detection lines, and the vertical distance L between each detection point and the outer end cutting end face of said shell ring blank is measuredMeasuring，LMeasuringHas a precision range of L4±0.5mm。
9. The process of manufacturing a high manganese steel shell ring according to claim 1, further comprising a non-destructive inspection performed 12 hours after the completion of the welding of the spool, wherein the non-destructive inspection is a non-destructive inspection performed on the welded shell ring.
10. The manufacturing process of the high manganese steel shell ring according to claim 1, wherein a welder needs to perform an air extraction process to remove manganese metal vapor or wear a gas supply mask to prevent the manganese metal vapor from being damaged during the reel welding step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111339889.2A CN113941833A (en) | 2021-11-12 | 2021-11-12 | Manufacturing process of high manganese steel material shell ring |
Applications Claiming Priority (1)
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Application publication date: 20220118 |