Processing technology of multi-row hole stainless steel manifold

Abstract

The application discloses a processing technology of a multi-row-hole stainless steel collecting pipe and relates to the technical field of metal processing. The processing technology of the multi-row-hole stainless steel collecting pipe comprises the following process steps: pre-cleaning, temperature rising, primary cooling, secondary cooling and tertiary cooling. Magnesium propenoate is filled in the pre-cleaned multi-row-hole stainless steel collecting pipe blank, temperature rising and heat preservation are carried out, primary cooling is carried out in a mixed atmosphere of argon and hydrogen, secondary cooling is carried out in a salt tank with molten salt liquid being ammonium borate, and finally, tertiary cooling is carried out in air cooling, so that the multi-row-hole stainless steel collecting pipe is prepared. The multi-row-hole stainless steel collecting pipe prepared by the application has high impact resistance and good corrosion resistance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal processing, in particular to a processing technology of a multi-row-hole stainless steel collecting pipe. BACKGROUND

[0002] The multi-row-hole stainless steel collecting pipe is often used as a natural gas conveying pipe, and most of the natural gas conveying pipes are buried underground. The components of the natural gas in the pipe include methane, ethane, propane, butane, hydrogen sulfide, carbon dioxide, nitrogen, water vapor, a small amount of carbon monoxide and a trace amount of rare gas. The hydrogen sulfide, carbon dioxide, nitrogen, water vapor and their mixtures have strong corrosiveness to the pipe.

[0003] Therefore, the multi-row-hole stainless steel collecting pipe has high requirements for impact resistance and corrosion resistance. However, the multi-row-hole stainless steel collecting pipe has multiple circular holes on the surface for connection with other pipes. When an impact is received, the holes on the surface of the multi-row-hole stainless steel collecting pipe are prone to cracking under stress, thereby causing natural gas leakage.

[0004] Therefore, it is urgent to improve the process steps of the processing technology of the multi-row-hole stainless steel collecting pipe, so that the processed multi-row-hole stainless steel collecting pipe has good impact resistance and corrosion resistance, and the multiple circular holes on the surface of the multi-row-hole stainless steel collecting pipe are not prone to cracking under external force impact. SUMMARY

[0005] To solve the problems in the prior art, the present application provides a processing technology of a multi-row-hole stainless steel collecting pipe, which comprises the following process steps: pre-cleaning, temperature rising, first cooling, second cooling and third cooling.

[0006] Preferably or alternatively, the pre-cleaning step is as follows: the multi-row-hole stainless steel collecting pipe blank is ultrasonically cleaned with an ethanol solution with a mass fraction of 30-50% at 30-40 kHz for 20-40 min, to obtain a pre-cleaned multi-row-hole stainless steel collecting pipe blank; the dirt on the surface of the multi-row-hole stainless steel collecting pipe blank is cleaned, and the impurities in the blind holes or thread gaps of the multi-row-hole stainless steel collecting pipe blank are cleaned out.

[0007] Preferably or alternatively, the nickel content of the multi-row-hole stainless steel collecting pipe blank is 8-10%.

[0008] Preferably or alternatively, the temperature rising step is as follows: the pre-cleaned multi-row-hole stainless steel collecting pipe blank is filled with magnesium propionate, and then is placed in a heat treatment furnace for vacuumizing, and then is filled with inert gas argon, and then is heated at a speed of 90-110 ℃ / h to 860-880 ℃, and is kept for 3-5 h.

[0009] Preferably or alternatively, the first cooling step is as follows: the pre-cleaned multi-row-hole stainless steel collecting pipe blank is cooled at a speed of 2-3 m / s.3 / min, and the argon-hydrogen mixed gas is introduced into the heat treatment furnace, the temperature is cooled to 770-790 DEG C at 10-20 DEG C / h, and the magnesium acrylate in the pipe is cleaned up, so that the once-cooled multi-row hole stainless steel manifold blank is prepared.

[0010] Preferably or alternatively, the mass ratio of argon to hydrogen in the argon-hydrogen mixed gas is 1:0.5-1:0.6.

[0011] The foregoing process steps fill the magnesium acrylate in the pre-cleaned multi-row hole stainless steel manifold blank, and the magnesium acrylate is heated and kept, so that the magnesium oxide grains are dispersed in the multi-row hole stainless steel manifold blank and pin the grain boundaries of the austenite, the austenite grain growth is suppressed, and the formation of acicular ferrite is promoted, so that the impact resistance of the multi-row hole stainless steel manifold is increased; meanwhile, the cementite is fully spheroidized, and the interaction with the mixed gas of inert gas and hydrogen in the once-cooling forms a large number of carbon nanowires at the edges of the holes of the multi-row hole stainless steel manifold in the form of "pins", which are further dispersed at the edges of the holes, so that the impact resistance of the multi-row hole stainless steel manifold is further increased.

[0012] Preferably or alternatively, the secondary cooling step is as follows: the once-cooled multi-row hole stainless steel manifold blank is put into the salt tank of the salt quenching equipment salt bath furnace in the heating furnace of the full-automatic salt quenching equipment under the protection of argon atmosphere, and the temperature is rapidly cooled to 300-320 DEG C and kept for 4-8 h, so that the secondary-cooled multi-row hole stainless steel manifold blank is prepared.

[0013] Preferably or alternatively, the molten salt liquid of the salt tank is ammonium borate.

[0014] Preferably or alternatively, the third cooling step is as follows: the secondary-cooled multi-row hole stainless steel manifold blank is naturally cooled to room temperature and discharged from the furnace, so that the multi-row hole stainless steel manifold is prepared.

[0015] Compared with the prior art, the beneficial effects achieved by the present application are:

[0016] The processing technology of the multi-row hole stainless steel manifold of the present application comprises the following process steps: pre-cleaning, heating, once-cooling, secondary cooling, and tertiary cooling; the magnesium acrylate is first filled in the pre-cleaned multi-row hole stainless steel manifold blank, and the magnesium acrylate is heated and kept, and then the once-cooling is performed in the mixed gas atmosphere of inert gas and hydrogen, and then the secondary cooling is performed in the salt tank with the molten salt liquid being ammonium borate, and finally the tertiary cooling is performed in the air cooling, so that the multi-row hole stainless steel manifold is prepared.

[0017] The multi-row hole stainless steel header blank is first cleaned by ultrasonic cleaning, the stains on the surface of the multi-row hole stainless steel header blank are cleaned, and the impurities in the blind hole or thread gap of the multi-row hole stainless steel header blank are cleaned out. The magnesium acrylate is filled in the pre-cleaned multi-row hole stainless steel header blank for heating and holding. The magnesium acrylate quickly enters the defect gap of the multi-row hole stainless steel header blank, forms magnesium oxide grains dispersed in the multi-row hole stainless steel header blank and pins the grain boundary of austenite, restrains the growth of austenite grains, and further promotes the formation of acicular ferrite, thereby increasing the impact resistance of the multi-row hole stainless steel header. At the same time, the cementite is fully spheroidized, and interacts with the mixed gas of inert gas and hydrogen in primary cooling, a large number of carbon nanowires are formed at the edge of the hole of the multi-row hole stainless steel header, which are dispersed in the form of "pins" at the edge of the hole, further increasing the impact resistance of the multi-row hole stainless steel header. During secondary cooling, ammonium borate is introduced to form a dense boron nitride layer on the surface of the multi-row hole stainless steel header, thereby enhancing the corrosion resistance of the multi-row hole stainless steel header. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] In order to more clearly illustrate the method provided by the present application, the following embodiments are described in detail. The test methods of various indexes of the multi-row hole stainless steel headers prepared in the following embodiments are as follows:

[0020] Toughness: The same quality of the multi-row hole stainless steel headers prepared in the examples and the comparative examples is taken, and the impact energy is tested at 0℃ on an INSTRON-450 impact testing machine, and whether the hole is cracked or not is observed.

[0021] Corrosion resistance: The same quality of the multi-row hole stainless steel headers prepared in the examples and the comparative examples is taken, and is immersed in a sodium hydroxide solution with a pH of 12 and nitric acid with a pH of 2. After each is soaked for 30 days, it is taken out, and the corrosion depth of the multi-row hole stainless steel header is tested.

[0022] Example 1

[0023] A processing technology of a multi-row hole stainless steel header, comprising the following process steps: pre-cleaning, heating, primary cooling, secondary cooling, and tertiary cooling.

[0024] (1) pre-cleaning: using a 30% ethanol solution with a mass fraction of 30% to ultrasonic clean the multi-row hole stainless steel manifold blank with a nickel content of 8% at 30 kHz for 20 min, to prepare the pre-cleaned multi-row hole stainless steel manifold blank;

[0025] (2) heating: filling the pre-cleaned multi-row hole stainless steel manifold blank with magnesium acrylate, then placing it in a heat treatment furnace to vacuum, filling the heat treatment furnace with inert gas argon, then heating to 860°C at a speed of 90°C / h, and holding for 3 h;

[0026] (3) first cooling: passing a mixed gas of argon and hydrogen with a mass ratio of 1:0.5 into the heat treatment furnace at a flow rate of 2 m 3 / min, cooling to 770°C at a rate of 10°C / h, continuing to hold for 3 h, and cleaning the magnesium acrylate in the tube, to prepare the first-cooled multi-row hole stainless steel manifold blank;

[0027] (4) second cooling: under the protection of argon gas, placing the first-cooled multi-row hole stainless steel manifold blank into the salt tank of the full-automatic salt quenching equipment in the heating furnace of the full-automatic salt quenching equipment, rapidly cooling to 300°C in the salt tank with molten ammonium borate, and holding for 4 h, to prepare the second-cooled multi-row hole stainless steel manifold blank;

[0028] (5) third cooling: naturally cooling the second-cooled multi-row hole stainless steel manifold blank to room temperature and discharging, to prepare the multi-row hole stainless steel manifold.

[0029] Example 2

[0030] A processing process of a multi-row hole stainless steel manifold, comprising the following process steps: pre-cleaning, heating, first cooling, second cooling, and third cooling.

[0031] (1) pre-cleaning: using a 40% ethanol solution with a mass fraction of 40% to ultrasonic clean the multi-row hole stainless steel manifold blank with a nickel content of 9% at 35 kHz for 30 min, to prepare the pre-cleaned multi-row hole stainless steel manifold blank;

[0032] (2) heating: filling the pre-cleaned multi-row hole stainless steel manifold blank with magnesium acrylate, then placing it in a heat treatment furnace to vacuum, filling the heat treatment furnace with inert gas argon, then heating to 870°C at a speed of 100°C / h, and holding for 4 h;

[0033] (3) first cooling: passing a mixed gas of argon and hydrogen with a mass ratio of 1:0.55 into the heat treatment furnace at a flow rate of 2.5 m 3 / min, cooling to 780°C at a rate of 15°C / h, continuing to hold for 4 h, and cleaning the magnesium acrylate in the tube, to prepare the first-cooled multi-row hole stainless steel manifold blank;

[0034] (4) Secondary cooling: under the protection of argon atmosphere, the primary cooled multi-row hole stainless steel manifold blank is put into the salt bath furnace of the full-automatic salt quenching equipment in the heating furnace of the full-automatic salt quenching equipment, rapidly cooled to 310℃ in the salt bath with molten salt solution of ammonium borate, and then kept for 6h, to obtain the secondary cooled multi-row hole stainless steel manifold blank;

[0035] (5) Tertiary cooling: the secondary cooled multi-row hole stainless steel manifold blank is naturally cooled to room temperature and discharged from the furnace, to obtain the multi-row hole stainless steel manifold.

[0036] Example 3

[0037] A processing technology of a multi-row hole stainless steel manifold, comprising the following process steps: pre-cleaning, temperature rising, primary cooling, secondary cooling, and tertiary cooling.

[0038] (1) Pre-cleaning: the multi-row hole stainless steel manifold blank with 10% nickel content is pre-cleaned with 40kHz ultrasonic cleaning for 40min using 50% ethanol solution, to obtain the pre-cleaned multi-row hole stainless steel manifold blank.

[0039] (2) Temperature rising: the pre-cleaned multi-row hole stainless steel manifold blank is filled with magnesium acrylate, then vacuumized in a heat treatment furnace, and then filled with inert gas argon, and then heated to 880℃ at a speed of 110℃ / h, and kept for 5h.

[0040] (3) Primary cooling: the heat treatment furnace is filled with mixed gas of argon and hydrogen with a mass ratio of 1:0.6 at a flow rate of 3m 3 / min, cooled to 790℃ at a speed of 20℃ / h, kept for 5h, and the magnesium acrylate in the pipe is cleaned, to obtain the primary cooled multi-row hole stainless steel manifold blank.

[0041] (4) Secondary cooling: under the protection of argon atmosphere, the primary cooled multi-row hole stainless steel manifold blank is put into the salt bath furnace of the full-automatic salt quenching equipment in the heating furnace of the full-automatic salt quenching equipment, rapidly cooled to 320℃ in the salt bath with molten salt solution of ammonium borate, and then kept for 8h, to obtain the secondary cooled multi-row hole stainless steel manifold blank.

[0042] (5) Tertiary cooling: the secondary cooled multi-row hole stainless steel manifold blank is naturally cooled to room temperature and discharged from the furnace, to obtain the multi-row hole stainless steel manifold.

[0043] Comparative Example 1

[0044] A processing technology of a multi-row hole stainless steel manifold, comprising the following process steps: temperature rising, primary cooling, secondary cooling, and tertiary cooling.

[0045] (1) heating: filling the multi-row hole stainless steel manifold blank with 9% nickel content with magnesium acrylate, then placing it in a heat treatment furnace, vacuumizing the heat treatment furnace, filling the heat treatment furnace with inert gas argon, then heating to 870°C at a speed of 100°C / h, and holding for 4h;

[0046] (2) primary cooling: passing a mixed gas of argon and hydrogen with a mass ratio of 1:0.55 into the heat treatment furnace at a rate of 2.5m 3 / min, cooling to 780°C at a rate of 15°C / h, continuing to hold for 4h, and cleaning the magnesium acrylate in the pipe to obtain a primary cooled multi-row hole stainless steel manifold blank;

[0047] (3) secondary cooling: placing the primary cooled multi-row hole stainless steel manifold blank in the salt bath furnace of the automatic salt quenching equipment in the heating furnace of the automatic salt quenching equipment under the protection of argon atmosphere, rapidly cooling to 310°C in the salt bath furnace with molten ammonium borate and holding for 6h to obtain a secondary cooled multi-row hole stainless steel manifold blank;

[0048] (4) tertiary cooling: naturally cooling the secondary cooled multi-row hole stainless steel manifold blank to room temperature and discharging from the furnace to obtain a multi-row hole stainless steel manifold.

[0049] Comparative Example 2

[0050] A processing technology of a multi-row hole stainless steel manifold, comprising the following process steps: pre-cleaning, heating, primary cooling, secondary cooling, and tertiary cooling.

[0051] (1) pre-cleaning: using an ethanol solution with a mass fraction of 40% to ultrasonically clean a multi-row hole stainless steel manifold blank with a nickel content of 9% at 35kHz for 30min to obtain a pre-cleaned multi-row hole stainless steel manifold blank;

[0052] (2) heating: placing the pre-cleaned multi-row hole stainless steel manifold blank in a heat treatment furnace, vacuumizing the heat treatment furnace, filling the heat treatment furnace with inert gas argon, then heating to 870°C at a speed of 100°C / h, and holding for 4h;

[0053] (3) primary cooling: passing a mixed gas of argon and hydrogen with a mass ratio of 1:0.55 into the heat treatment furnace at a rate of 2.5m 3 / min, cooling to 780°C at a rate of 15°C / h, continuing to hold for 4h, and cleaning the magnesium acrylate in the pipe to obtain a primary cooled multi-row hole stainless steel manifold blank;

[0054] (4) Secondary cooling: under the protection of argon atmosphere, the primary cooled multi-row hole stainless steel manifold blank is put into the salt bath furnace of the full-automatic salt quenching equipment in the heating furnace of the full-automatic salt quenching equipment, rapidly cooled to 310℃ in the salt bath with molten salt solution of ammonium borate, and then kept for 6h, to obtain the secondary cooled multi-row hole stainless steel manifold blank;

[0055] (5) Tertiary cooling: the secondary cooled multi-row hole stainless steel manifold blank is naturally cooled to room temperature and discharged from the furnace, to obtain the multi-row hole stainless steel manifold.

[0056] Comparative Example 3

[0057] A processing technology of a multi-row hole stainless steel manifold, comprising the following process steps: pre-cleaning, temperature rising, primary cooling, secondary cooling, and tertiary cooling.

[0058] (1) Pre-cleaning: the multi-row hole stainless steel manifold blank with 9% nickel content is pre-cleaned by using 40% ethanol solution at 35 kHz for 30 min, to obtain the pre-cleaned multi-row hole stainless steel manifold blank.

[0059] (2) Temperature rising: the pre-cleaned multi-row hole stainless steel manifold blank is filled with magnesium acrylate, and then is placed in a heat treatment furnace for vacuumizing, and then is filled with inert gas argon, and then is heated to 870℃ at a speed of 100℃ / h, and kept for 4h.

[0060] (3) Primary cooling: the inert gas argon is introduced into the heat treatment furnace at a speed of 2.5m 3 / min, and cooled to 780℃ at a speed of 15℃ / h, and kept for 4h, and the magnesium acrylate in the pipe is cleaned, to obtain the primary cooled multi-row hole stainless steel manifold blank.

[0061] (4) Secondary cooling: under the protection of argon atmosphere, the primary cooled multi-row hole stainless steel manifold blank is put into the salt bath furnace of the full-automatic salt quenching equipment in the heating furnace of the full-automatic salt quenching equipment, rapidly cooled to 310℃ in the salt bath with molten salt solution of ammonium borate, and then kept for 6h, to obtain the secondary cooled multi-row hole stainless steel manifold blank.

[0062] (5) Tertiary cooling: the secondary cooled multi-row hole stainless steel manifold blank is naturally cooled to room temperature and discharged from the furnace, to obtain the multi-row hole stainless steel manifold.

[0063] Comparative Example 4

[0064] A processing technology of a multi-row hole stainless steel manifold, comprising the following process steps: pre-cleaning, temperature rising, primary cooling, secondary cooling, and tertiary cooling.

[0065] (1) pre-cleaning: using a 40% ethanol solution with a mass fraction of 9% nickel content of multi-row hole stainless steel manifold blank with 35 kHz ultrasonic cleaning for 30 min, to prepare a pre-cleaned multi-row hole stainless steel manifold blank;

[0066] (2) heating: filling magnesium acrylate in the pre-cleaned multi-row hole stainless steel manifold blank, then placing it in a heat treatment furnace to vacuum, filling the heat treatment furnace with inert gas argon, then heating to 870℃ at a speed of 100℃ / h, and holding for 4h;

[0067] (3) first cooling: passing a mixed gas of argon and hydrogen with a mass ratio of 1:0.55 into the heat treatment furnace at a speed of 2.5m 3 / min, cooling to 780℃ at a speed of 15℃ / h, continuing to hold for 4h, and cleaning the magnesium acrylate in the tube, to prepare a first-cooled multi-row hole stainless steel manifold blank;

[0068] (4) second cooling: naturally cooling the first-cooled multi-row hole stainless steel manifold blank to room temperature and taking it out of the furnace, to prepare a multi-row hole stainless steel manifold.

[0069] Comparative Example 5

[0070] A processing technology of a multi-row hole stainless steel manifold, comprising the following process steps: pre-cleaning, heating, first cooling, second cooling, third cooling;

[0071] (1) pre-cleaning: using a 40% ethanol solution with a mass fraction of 9% nickel content of multi-row hole stainless steel manifold blank with 35 kHz ultrasonic cleaning for 30 min, to prepare a pre-cleaned multi-row hole stainless steel manifold blank;

[0072] (2) heating: filling magnesium acrylate in the pre-cleaned multi-row hole stainless steel manifold blank, then placing it in a heat treatment furnace to vacuum, filling the heat treatment furnace with inert gas argon, then heating to 870℃ at a speed of 100℃ / h, and holding for 4h;

[0073] (3) first cooling: passing a mixed gas of argon and hydrogen with a mass ratio of 1:0.55 into the heat treatment furnace at a speed of 2.5m 3 / min, cooling to 780℃ at a speed of 15℃ / h, continuing to hold for 4h, and cleaning the magnesium acrylate in the tube, to prepare a first-cooled multi-row hole stainless steel manifold blank;

[0074] (4) second cooling: under the protection of argon atmosphere, rapidly cooling the first-cooled multi-row hole stainless steel manifold to 310℃ at a speed of 75-85℃ / h by air cooling, and holding for 6h, to prepare a second-cooled multi-row hole stainless steel manifold blank;

[0075] (5) third cooling: the secondly cooled multi-row hole stainless steel manifold blank is naturally cooled to normal temperature and discharged from the furnace to prepare the multi-row hole stainless steel manifold.

[0076] Effect example

[0077] The following Table 1 shows the analysis results of the impact resistance and corrosion resistance of the multi-row hole stainless steel manifold prepared by using the examples 1 to 3 and the comparative examples 1 to 5 of the present application.

[0078] Table 1

[0079]

[0080] It can be found from Table 1 that the multi-row hole stainless steel manifold prepared by using the examples 1, 2 and 3 has good impact resistance and corrosion resistance; it can be found from the comparison of the experimental data of the examples 1, 2 and 3 and the comparative example 1 that the multi-row hole stainless steel manifold prepared by using the pre-cleaning has good impact resistance; it can be found from the experimental data of the examples 1, 2 and 3 and the comparative example 2 that the multi-row hole stainless steel manifold prepared by filling the magnesium acrylate in the pre-cleaned multi-row hole stainless steel manifold blank during the temperature rising has good impact resistance; it can be found from the experimental data of the examples 1, 2 and 3 and the comparative example 3 that the multi-row hole stainless steel manifold prepared by using the mixed atmosphere of argon and hydrogen for the first cooling has good impact resistance; it can be found from the experimental data of the examples 1, 2 and 3 and the comparative examples 4 and 5 that the multi-row hole stainless steel manifold prepared by using the molten salt liquid of ammonium borate in the salt bath for the second cooling has good corrosion resistance.

[0081] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the involved claims.

Claims

1. A processing technology for a multi-row perforated stainless steel manifold, characterized in that, The process includes the following steps: pre-cleaning, heating, primary cooling, secondary cooling, and tertiary cooling; The heating steps are as follows: fill the pre-cleaned multi-row perforated stainless steel manifold blank with magnesium acrylate, then place it in a heat treatment furnace and evacuate it. Inert gas argon is introduced into the heat treatment furnace, and then the temperature is raised to 860-880℃ at a rate of 90-110℃ / h and held for 3-5h. The primary cooling process is as follows: with a flow rate of 2~3m 3 A mixture of argon and hydrogen is introduced into the heat treatment furnace at a rate of 10~20℃ / h to cool it to 770~790℃. The temperature is then maintained for 3~5h to clean the magnesium acrylate inside the tube and prepare a multi-row perforated stainless steel manifold blank that has been cooled once. The secondary cooling process is as follows: Under the protective atmosphere of argon, in the heating furnace of the fully automatic salt quenching equipment, the multi-row perforated stainless steel manifold billet that has been cooled once is put into the salt bath of the fully automatic salt quenching equipment. After being rapidly cooled to 300℃~320℃ in the salt bath, it is kept at that temperature for 4~8 hours to prepare the multi-row perforated stainless steel manifold billet that has been cooled twice. The molten salt solution in the salt bath is ammonium borate. The three-stage cooling process is as follows: the multi-hole stainless steel manifold billet, which has undergone secondary cooling, is naturally cooled to room temperature and then removed from the furnace to obtain the multi-hole stainless steel manifold.

2. The processing technology of a multi-row perforated stainless steel manifold according to claim 1, characterized in that, The pre-cleaning steps are as follows: use an ethanol solution with a mass fraction of 30-50% to ultrasonically clean the multi-row perforated stainless steel manifold blank at 30-40 kHz for 20-40 min to prepare a pre-cleaned multi-row perforated stainless steel manifold blank.

3. The processing technology of a multi-row perforated stainless steel manifold according to claim 2, characterized in that, The nickel content of the multi-row perforated stainless steel manifold blank is 8-10%.

4. The processing technology of a multi-row perforated stainless steel manifold according to claim 1, characterized in that, The mass ratio of argon to hydrogen in the argon-hydrogen mixture is 1:0.5 to 1:0.6.

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