CN113088820A - Production process of 8630MOD3-85K forge piece for hanging deep sea wellhead casing - Google Patents

Production process of 8630MOD3-85K forge piece for hanging deep sea wellhead casing Download PDF

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CN113088820A
CN113088820A CN202110359365.3A CN202110359365A CN113088820A CN 113088820 A CN113088820 A CN 113088820A CN 202110359365 A CN202110359365 A CN 202110359365A CN 113088820 A CN113088820 A CN 113088820A
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forging
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temperature
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周勇
葛辉
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Suzhou Lygm Subsea Oil Equipment Tech Co ltd
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Suzhou Lygm Subsea Oil Equipment Tech Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
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    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
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    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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    • C21D6/00—Heat treatment of ferrous alloys
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    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
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    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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Abstract

The invention discloses a production process of 8630MOD3-85K forge pieces for hanging deep sea wellhead casings, which comprises the following chemical components in percentage by weight: c is 0.25 to 0.33; 0.15 to 0.35 percent of Si; 0.7 to 1.1 parts of Mn; p is less than or equal to 0.015; s is less than or equal to 0.01; 0.85-1 of Cr; 0.75 to 0.99 percent of Ni; 0.35-0.45% of Mo; cu is less than or equal to 0.25; ti is less than or equal to 0.025; bi is less than or equal to 0.01; n is less than or equal to 0.012; nb is less than or equal to 0.01; 0.02-0.035% of Al; sn is less than or equal to 0.015; v is 0.002-0.03; b is less than or equal to 0.0005; pb is less than or equal to 0.01; as is less than or equal to 0.02; sb is less than or equal to 0.02; h is less than or equal to 1.6 ppm; o is less than or equal to 25 ppm; CE is less than 0.833, the rest is Fe, and DI value is greater than 8.0.

Description

Production process of 8630MOD3-85K forge piece for hanging deep sea wellhead casing
Technical Field
The invention relates to a production process of 8630MOD3-85K forgings for deep sea wellhead casing hangers.
Background
China has become the largest world importing countries of crude oil and natural gas, the oil and gas dependence degree still keeps rising, and the energy safety situation is very severe. The marine oil and gas industry is vigorously developed, the marine oil and gas exploration and development strength is improved, specific measures for enhancing the domestic oil and gas exploration and development work strength and guaranteeing the national energy safety requirement in the center are implemented, and the inevitable requirement for guaranteeing the Chinese energy safety is met. As a marine big country, the marine oil and gas resources in China are rich, but the overall exploration degree is relatively low, and the marine oil and gas is an important field for increasing the yield greatly for a long time in China. Therefore, the country advocates the autonomous exploration strength of marine oil and gas and actively lays out the work of the global marine oil and gas industry. In this context, the exploitation of deep sea oil and gas resources is not supported by high performance equipment, and the production of high performance equipment is more based on high performance materials.
The deep sea wellhead casing hanging forge piece needs to meet the requirements of API specification and DNVGL-RP-0034SFC2 grade, the yield strength needs to meet 85KSI, the impact toughness of a low-temperature material needs to meet the requirement that the-29 ℃ is more than 70J, and the H resistance is high2And S corrosion. As the upper end of the casing hanger needs to be connected with other casing hangers which are opened by oil gas, 625 nickel-based alloy needs to be built in the inner wall of the upper end in a surfacing mode to play a role in corrosion resistance and abrasion resistance, and the strength after the surfacing needs to meet the 85K level.
For a common American standard 8630 material, the performance requirement of the whole section of a sleeve hanger forging is difficult to meet the 85KSI yield strength index by the conventional chemical component proportion and hot working process, the conditions of low local strength or poor low-temperature impact toughness and the like often occur according to the test result of DNVGL-RP-0034 underwater forging specification requirement, and particularly the yield strength of 85KSI needs to be met after the post-weld simulated heat treatment process of heat preservation at 650 ℃ for 16 hours. The general 8630 forge piece manufacturing process can not stably pass an evaluation test required by the underwater forge piece specification, and can not meet the application requirement of deep-sea forge pieces.
Disclosure of Invention
The invention aims to provide a production process of 8630MOD3-85K forge pieces for deep sea wellhead casing hangers, and the 8630MOD3-85K casing hanger forge pieces produced by the process can improve the strength and increase the hardenability of materials under the condition of not losing impact toughness, and meet the requirements of 85K strength before welding and 85KSI grade performance after simulated heat treatment after welding.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the production process of 8630MOD3-85K forgings for hanging deep sea wellhead casings comprises the following production steps:
taking chemical components as follows: 0.25 to 0.33 percent of C; 0.15 to 0.35 percent of Si; 0.7 to 1.1 percent of Mn; p is less than or equal to 0.015 percent; s is less than or equal to 0.01 percent; 0.85-1% of Cr; 0.75 to 0.99 percent of Ni; 0.35 to 0.45 percent of Mo; cu is less than or equal to 0.25 percent; ti is less than or equal to 0.025 percent; bi is less than or equal to 0.01 percent; n is less than or equal to 0.012 percent; nb is less than or equal to 0.01 percent; 0.02-0.035% of Al; sn is less than or equal to 0.015 percent; 0.002-0.03% of V; b is less than or equal to 0.0005 percent; pb is less than or equal to 0.01 percent; as is less than or equal to 0.02 percent; sb accounts for less than or equal to 0.02 percent; h is less than or equal to 1.6 ppm; o is less than or equal to 25 ppm; less than 0.833 percent of CE, the balance of Fe and a steel billet with a DI value of more than 8.0 as a raw material;
preheating a steel billet, placing the steel billet into a forging furnace for heating after preheating, keeping the temperature constant when the temperature of the steel billet reaches the initial forging temperature, and keeping the temperature for 0.5-1.5 h/inch (inch is the maximum wall thickness of the steel billet), then adopting a WHF forging method and an FM forging method to repeatedly upset and draw the steel billet transversely and longitudinally for three times, so that the steel billet forges a sleeve hung forging piece with an inner hole, wherein the initial forging temperature is not more than 1200 ℃, the final forging temperature is 850-900 ℃, the temperature in the whole forging process is controlled between 850-1200 ℃, the comprehensive forging ratio is more than 6:1, and the deformation of the final upsetting is not less than 20%;
normalizing, namely heating the sleeve hanging forging to 920 ℃, then preserving heat, controlling the heat preservation time to be not less than 0.5h/inch (inch is the maximum wall thickness dimension of the sleeve forging), and then discharging from a furnace and air-cooling to room temperature; then quenching, namely heating the sleeve hanger forging to 880 ℃, then preserving heat, controlling the heat preservation time within 0.5-1.5 h/inch, then transferring the sleeve hanger forging into quenching liquid within 80 seconds for quenching, and after the quenching is finished, controlling the temperature of the surface of the sleeve hanger forging to be lower than 200 ℃; finally, tempering, namely heating the sleeve hanging forge piece to 690 ℃, preserving heat, controlling the heat preservation time within 1.0-1.5 h/inch, and then discharging from the furnace and air-cooling to room temperature;
and (3) simulating heat treatment after welding, heating the welded casing hanger forge piece to 650 ℃, preserving heat for 16 hours, then air-cooling to room temperature, and evaluating that the welded casing hanger forge piece meets 85K strength index.
Further, the production process of the 8630MOD3-85K forging for hanging the deep sea wellhead casing comprises the following steps of: 0.29 to 0.33 percent of C; 0.89 to 1.1 percent of Mn; 0.9-1% of Cr; 0.35 to 0.42 percent of Mo.
Further, the production process of the 8630MOD3-85K forging for the deep sea wellhead casing hanger is characterized in that each upsetting is completed within one firing time in the forging process.
Further, according to the production process of the 8630MOD3-85K forge piece for hanging the deep sea wellhead casing, in the forging process, when the temperature of the steel billet is reduced to be close to the lower limit temperature, the steel billet should be immediately returned to the furnace for heating, and the time for returning to the furnace for keeping the temperature is as follows: 1.0-3.0 h.
Further, according to the production process of the 8630MOD3-85K forge piece for hanging the deep sea wellhead casing, in the quenching process, the quenching liquid needs to be in a flowing state, the temperature of the quenching liquid is not higher than 18 ℃ when the quenching is started, and the temperature of the quenching liquid is not higher than 25 ℃ when the quenching is finished.
Further, in the production process of the 8630MOD3-85K forging piece for the deep sea wellhead casing hanger, a high-pressure fluid pump is used for continuously spraying quenching liquid into the inner hole of the casing hanger forging piece in the quenching process, and the temperature of the quenching liquid is not higher than 18 ℃.
The invention has the advantages that: the improved bushing hanger has the advantages that the improved bushing hanger is improved on the basis of the traditional 8630 material, the content of C, Mn, Cr and Mo is improved, meanwhile, the carbon equivalent CE is less than 0.833%, the weldability is ensured, the content of C is improved, the yield point and the tensile strength of the bushing hanger can be improved, the content of Cr is improved, the hardenability of the bushing hanger can be increased, the comprehensive mechanical property is good after quenching and tempering, the hardness and the wear resistance of the bushing hanger are improved, the content of Mo is improved, the acid resistance and the H resistance can be improved2S is corroded, the plasticity can be improved under high-temperature tempering, the Mn content can be improved to play a better role in deoxidation and desulfurization, and the impact toughness of the casing hanger can meet the condition that the minus 29 ℃ is more than 70J by adding V; the forging process is optimized, the original defects of segregation, looseness, air holes and the like in the steel billet are eliminated, the microstructure is optimized, the grain size is controlled, and the mechanical property is improved; optimizing a heat treatment process, sequentially normalizing at 920 ℃, quenching at 880 ℃ and tempering at 690 ℃, so that the strength requirement of 85K before the suspension welding of the sleeve can be met, and evaluating the performance of the suspension forging of the sleeve after welding to meet the level of 85KSI by adopting a post-welding simulation heat treatment process which keeps the temperature at 650 ℃ for 16 hours after welding.
Detailed Description
The technical solution of the present invention is further described with reference to the following specific examples.
Example 1
The invention relates to a production process of 8630MOD3-85K forge pieces for deep sea wellhead casing hangers, which comprises the following production steps:
taking chemical components as follows: 0.25 to 0.33 percent of C; 0.15 to 0.35 percent of Si; 0.7 to 1.1 percent of Mn; p is less than or equal to 0.015 percent; s is less than or equal to 0.01 percent; 0.85-1% of Cr; 0.75 to 0.99 percent of Ni; 0.35 to 0.45 percent of Mo; cu is less than or equal to 0.25 percent; ti is less than or equal to 0.025 percent; bi is less than or equal to 0.01 percent; n is less than or equal to 0.012 percent; nb is less than or equal to 0.01 percent; 0.02-0.035% of Al; sn is less than or equal to 0.015 percent; 0.002-0.03% of V; b is less than or equal to 0.0005 percent; pb is less than or equal to 0.01 percent; as is less than or equal to 0.02 percent; sb accounts for less than or equal to 0.02 percent; h is less than or equal to 1.6 ppm; o is less than or equal to 25 ppm; less than 0.833 percent of CE, the balance of Fe and a steel billet with a DI value of more than 8.0 as a raw material;
preheating a steel billet, placing the steel billet into a forging furnace for heating after preheating, keeping the temperature constant when the temperature of the steel billet reaches the initial forging temperature, and keeping the temperature constant, wherein the heat preservation time is calculated by 0.5 h/inch-1.5 h/inch (inch is the maximum wall thickness dimension of the steel billet), then adopting a WHF forging method and an FM forging method to carry out transverse and longitudinal repeated upsetting and drawing on the steel billet for three times, so that the steel billet is forged into a sleeve hung forging piece with an inner hole, each upsetting and drawing is completed within one fire, the initial forging temperature is not more than 1200 ℃, the final forging temperature is 850-900 ℃, the temperature in the whole forging process is controlled between 850-1200 ℃, the comprehensive forging ratio is more than 6:1, the final upsetting deformation is not less than 20%, the grain size is controlled, when the temperature of the steel billet is reduced to be close to the lower limit temperature, the steel billet is immediately returned to the furnace for heating, and the time of returning: 1.0-3.0 h to prevent excessive oxidation;
normalizing, namely heating the sleeve hanging forging to 920 ℃, then preserving heat, controlling the heat preservation time to be not less than 0.5h/inch (inch is the maximum wall thickness dimension of the sleeve forging), and then discharging from a furnace and air-cooling to room temperature; then quenching, namely heating the sleeve hanger forging to 880 ℃, preserving heat, controlling the heat preservation time within 0.5-1.5 h/inch, then transferring the sleeve hanger forging to quenching liquid for quenching within 80 seconds, wherein the quenching liquid needs to be in a flowing state in the quenching process, the temperature of the quenching liquid is not higher than 18 ℃ when the quenching is started, the temperature of the quenching liquid is not higher than 25 ℃ when the quenching is finished, continuously spraying the quenching liquid into an inner hole on the sleeve hanger forging by using a high-pressure fluid pump, the temperature of the quenching liquid is not higher than 18 ℃, and the temperature of the surface of the sleeve hanger forging is lower than 200 ℃ after the quenching is finished; finally, tempering, namely heating the sleeve hanging forge piece to 690 ℃, preserving heat, controlling the heat preservation time within 1.0-1.5 h/inch, and then discharging from the furnace and air-cooling to room temperature;
and (3) simulating heat treatment after welding, heating the welded casing hanger forge piece to 650 ℃, preserving heat for 16 hours, then air-cooling to room temperature, and evaluating that the welded casing hanger forge piece meets the 85KSI strength index.
Example 2
Taking the following chemical components in percentage by weight: 0.29 to 0.33 percent of C; 0.15 to 0.35 percent of Si; 0.89 to 1.1 percent of Mn; p is less than or equal to 0.015 percent; s is less than or equal to 0.01 percent; 0.9-1% of Cr; 0.75 to 0.99 percent of Ni; 0.35 to 0.42 percent of Mo; cu is less than or equal to 0.25 percent; ti is less than or equal to 0.025 percent; bi is less than or equal to 0.01 percent; n is less than or equal to 0.012 percent; nb is less than or equal to 0.01 percent; 0.02-0.035% of Al; sn is less than or equal to 0.015 percent; 0.002-0.03% of V; b is less than or equal to 0.0005 percent; pb is less than or equal to 0.01 percent; as is less than or equal to 0.02 percent; sb accounts for less than or equal to 0.02 percent; h is less than or equal to 1.6 ppm; o is less than or equal to 25 ppm; less than 0.833 percent of CE, the balance of Fe and a steel billet with a DI value of more than 8.0 as a raw material;
preheating a steel billet, placing the steel billet into a forging furnace for heating after preheating, keeping the temperature constant when the temperature of the steel billet reaches the initial forging temperature, and keeping the temperature constant, wherein the heat preservation time is calculated by 0.5 h/inch-1.5 h/inch (inch is the maximum wall thickness dimension of the steel billet), then adopting a WHF forging method and an FM forging method to carry out transverse and longitudinal repeated upsetting and drawing on the steel billet for three times, so that the steel billet is forged into a sleeve hung forging piece with an inner hole, each upsetting and drawing is completed within one fire, the initial forging temperature is not more than 1200 ℃, the final forging temperature is 850-900 ℃, the temperature in the whole forging process is controlled between 850-1200 ℃, the comprehensive forging ratio is more than 6:1, the final upsetting deformation is not less than 20%, the grain size is controlled, when the temperature of the steel billet is reduced to be close to the lower limit temperature, the steel billet is immediately returned to the furnace for heating, and the time of returning: 1.0-3.0 h to prevent excessive oxidation;
normalizing, namely heating the sleeve hanging forging to 920 ℃, then preserving heat, controlling the heat preservation time to be not less than 0.5h/inch (inch is the maximum wall thickness dimension of the sleeve forging), and then discharging from a furnace and air-cooling to room temperature; then quenching, namely heating the sleeve hanger forging to 880 ℃, preserving heat, controlling the heat preservation time within 0.5-1.5 h/inch, then transferring the sleeve hanger forging to quenching liquid for quenching within 80 seconds, wherein the quenching liquid needs to be in a flowing state in the quenching process, the temperature of the quenching liquid is not higher than 18 ℃ when the quenching is started, the temperature of the quenching liquid is not higher than 25 ℃ when the quenching is finished, continuously spraying the quenching liquid into an inner hole on the sleeve hanger forging by using a high-pressure fluid pump, the temperature of the quenching liquid is not higher than 18 ℃, and the temperature of the surface of the sleeve hanger forging is lower than 200 ℃ after the quenching is finished; finally, tempering, namely heating the sleeve hanging forge piece to 690 ℃, preserving heat, controlling the heat preservation time within 1.0-1.5 h/inch, and then discharging from the furnace and air-cooling to room temperature;
and (3) simulating heat treatment after welding, heating the welded casing hanger forge piece to 650 ℃, preserving heat for 16 hours, then air-cooling to room temperature, and evaluating that the welded casing hanger forge piece meets the 85KSI strength index.
The 8630MOD3-85K casing hanger forging produced by the process can improve the strength and increase the hardenability of the material without losing impact toughness, meet the 85K strength before welding and the 85KSI performance after simulated heat treatment after welding, ensure that all performance indexes of all parts of the deep-sea high-performance casing hanger forging meet the requirements, and meet the harsh application requirements under the deep-sea environment.
The mechanical test results of the deep sea wellhead casing hanger manufactured by the production mode are as follows:
Figure BDA0003004851340000051
the transverse and longitudinal impact test results of the deep sea wellhead casing manufactured by the production method of the invention hung in an environment of 29 ℃ below zero are as follows:
Figure BDA0003004851340000061

Claims (6)

1. the production process of 8630MOD3-85K forgings for hanging deep sea wellhead casings is characterized by comprising the following steps: the production steps are as follows:
taking chemical components as follows: 0.25 to 0.33 percent of C; 0.15 to 0.35 percent of Si; 0.7 to 1.1 percent of Mn; p is less than or equal to 0.015 percent; s is less than or equal to 0.01 percent; 0.85-1% of Cr; 0.75 to 0.99 percent of Ni; 0.30 to 0.42 percent of Mo; cu is less than or equal to 0.25 percent; ti is less than or equal to 0.025 percent; bi is less than or equal to 0.01 percent; n is less than or equal to 0.012 percent; nb is less than or equal to 0.01 percent; 0.02-0.035% of Al; sn is less than or equal to 0.015 percent; 0.002-0.03% of V; b is less than or equal to 0.0005 percent; pb is less than or equal to 0.01 percent; as is less than or equal to 0.02 percent; sb accounts for less than or equal to 0.02 percent; h is less than or equal to 1.6 ppm; o is less than or equal to 25 ppm; less than 0.833 percent of CE, the balance of Fe and a steel billet with a DI value of more than 8.0 as a raw material;
preheating a steel billet, placing the steel billet into a forging furnace for heating after preheating, keeping the temperature constant when the temperature of the steel billet reaches the initial forging temperature, and keeping the temperature for 0.5-1.5 h/inch (inch is the maximum wall thickness of the steel billet), then adopting a WHF forging method and an FM forging method to repeatedly upset and draw the steel billet transversely and longitudinally for three times, so that the steel billet forges a sleeve hung forging piece with an inner hole, wherein the initial forging temperature is not more than 1200 ℃, the final forging temperature is 850-900 ℃, the temperature in the whole forging process is controlled between 850-1200 ℃, the comprehensive forging ratio is more than 6:1, and the deformation of the final upsetting is not less than 20%;
normalizing, namely heating the sleeve hanging forging to 920 ℃, then preserving heat, controlling the heat preservation time to be not less than 0.5h/inch (inch is the maximum wall thickness dimension of the sleeve forging), and then discharging from a furnace and air-cooling to room temperature; then quenching, namely heating the sleeve hanger forging to 880 ℃, then preserving heat, controlling the heat preservation time within 0.5-1.5 h/inch, then transferring the sleeve hanger forging into quenching liquid within 80 seconds for quenching, and after the quenching is finished, controlling the temperature of the surface of the sleeve hanger forging to be lower than 200 ℃; finally, tempering, namely heating the sleeve hanging forge piece to 690 ℃, preserving heat, controlling the heat preservation time within 1.0-1.5 h/inch, and then discharging from the furnace and air-cooling to room temperature;
and (3) simulating heat treatment after welding, heating the welded casing hanger forge piece to 650 ℃, preserving heat for 16 hours, then air-cooling to room temperature, and evaluating that the welded casing hanger forge piece meets 85K strength index.
2. The production process of 8630MOD3-85K forgings for deep sea wellhead casing hangers according to claim 1, wherein the production process comprises the following steps: the steel billet comprises the following components in percentage by weight: 0.29 to 0.33 percent of C; 0.89 to 1.1 percent of Mn; 0.9-1% of Cr; 0.35 to 0.42 percent of Mo.
3. The production process of the 8630MOD3-85K forging for the deep sea wellhead casing hanger according to claim 1 or 2, characterized in that: during forging, each upset is completed within one fire.
4. The production process of the 8630MOD3-85K forging for the deep sea wellhead casing hanger according to claim 1 or 2, characterized in that: in the forging process, when the temperature of the steel billet is reduced to be close to the lower limit temperature, the steel billet is immediately returned to be heated, and the time of returning to be heated is as follows: 1.0-3.0 h.
5. The production process of the 8630MOD3-85K forging for the deep sea wellhead casing hanger according to claim 1 or 2, characterized in that: in the quenching process, the quenching liquid needs to be in a flowing state, the temperature of the quenching liquid is not higher than 18 ℃ when the quenching is started, and the temperature of the quenching liquid is not higher than 25 ℃ when the quenching is finished.
6. The production process of 8630MOD3-85K forgings for deep sea wellhead casing hangers according to claim 5, wherein the forging process comprises the following steps: in the quenching process, a high-pressure fluid pump is used for continuously spraying quenching liquid into the inner hole on the sleeve hanger forging, and the temperature of the quenching liquid is not higher than 18 ℃.
CN202110359365.3A 2021-04-02 2021-04-02 Production process of 8630MOD3-85K forge piece for hanging deep sea wellhead casing Pending CN113088820A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113528763A (en) * 2021-07-20 2021-10-22 苏州雷格姆海洋石油设备科技有限公司 Production process of ultrahigh-strength large-wall-thickness underwater Christmas tree wellhead connector forge piece

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JP2000265245A (en) * 1999-03-15 2000-09-26 Sumitomo Metal Ind Ltd High strength and high toughness non-refining steel
CN101096745A (en) * 2006-06-28 2008-01-02 宝山钢铁股份有限公司 Composite high-strength high-ductility hardened and tempered steel and manufacturing method thereof
US20150071811A1 (en) * 2012-04-05 2015-03-12 Tata Steel Ijmuiden Bv Steel strip having a low si content
CN112281069A (en) * 2020-10-30 2021-01-29 张家港海锅新能源装备股份有限公司 Production method of 8630 super-long forge piece for deep sea Christmas tree equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000265245A (en) * 1999-03-15 2000-09-26 Sumitomo Metal Ind Ltd High strength and high toughness non-refining steel
CN101096745A (en) * 2006-06-28 2008-01-02 宝山钢铁股份有限公司 Composite high-strength high-ductility hardened and tempered steel and manufacturing method thereof
US20150071811A1 (en) * 2012-04-05 2015-03-12 Tata Steel Ijmuiden Bv Steel strip having a low si content
CN112281069A (en) * 2020-10-30 2021-01-29 张家港海锅新能源装备股份有限公司 Production method of 8630 super-long forge piece for deep sea Christmas tree equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113528763A (en) * 2021-07-20 2021-10-22 苏州雷格姆海洋石油设备科技有限公司 Production process of ultrahigh-strength large-wall-thickness underwater Christmas tree wellhead connector forge piece

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Application publication date: 20210709