WO2017206441A1 - Process for heat treatment of grade r6 mooring chain - Google Patents

Process for heat treatment of grade r6 mooring chain Download PDF

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Publication number
WO2017206441A1
WO2017206441A1 PCT/CN2016/105386 CN2016105386W WO2017206441A1 WO 2017206441 A1 WO2017206441 A1 WO 2017206441A1 CN 2016105386 W CN2016105386 W CN 2016105386W WO 2017206441 A1 WO2017206441 A1 WO 2017206441A1
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Prior art keywords
temperature
mooring chain
chain
zone
furnace
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PCT/CN2016/105386
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French (fr)
Chinese (zh)
Inventor
邵云亮
张明
陶安祥
陶兴
张卫新
李剑
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江苏亚星锚链股份有限公司
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Application filed by 江苏亚星锚链股份有限公司 filed Critical 江苏亚星锚链股份有限公司
Priority to BR112017028512A priority Critical patent/BR112017028512A2/en
Publication of WO2017206441A1 publication Critical patent/WO2017206441A1/en

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0087—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for chains, for chain links

Definitions

  • the invention relates to a marine mooring chain, in particular to a R6 grade mooring chain heat treatment process.
  • the R6 mooring chain is a newly developed mooring chain with high strength and toughness. Its tensile strength is ⁇ 1110MPa, and the V-notch impact is ⁇ 58J. Since the R6 mooring chain has a large heat treatment sensitivity, if the heat treatment process is slightly different in the process design or execution process, the influence on the performance of the R6 mooring chain is great. It can be seen that the heat treatment process is one of the key technologies in the R6 mooring chain manufacturing process. Therefore, the strength of the weld and base metal of the R6 mooring chain link must be controlled by a reasonable heat treatment process to meet the requirements of the classification society and to achieve mass production.
  • Mooring chain heat treatment is a key process in the manufacture of mooring chains.
  • heat treatment is used to improve the quality of welds.
  • quenching + high temperature tempering is used to optimize the toughness of materials. The effect, so a reasonable heat treatment process system will directly affect the performance of the mooring chain. Due to the special use environment of the mooring chain, its length often exceeds 1000 meters. For this kind of product, the traditional heat treatment furnace obviously can not meet the requirements, and the mining ring chain is usually quenched by induction heating, but its specifications often do not exceed 40mm in diameter, while the mooring chain has a minimum specification of 50mm, and the common specifications are about 90mm. And therefore does not apply.
  • the mooring chain treatment should use a vertical continuous tempering furnace, and the chain is continuously operated in the furnace through the guide wheel to achieve heating or heat preservation.
  • the second is to improve the heat treatment equipment, to guarantee the process from the aspects of control precision and stability, and at the same time in production During the process, the heat treatment parameters and processes are closely monitored to ensure product quality.
  • the object of the present invention is to solve the above technical problems.
  • R6 grade mooring chain heat treatment process comprising the following steps:
  • the mooring chain enters the rapid heating zone and raises the temperature to above 700 °C;
  • the temperature of the mooring chain in the quenching temperature heating zone is controlled at 1045 ° C, after entering the holding zone, the temperature is controlled at 1015 ° C, and the temperature is kept for 190 minutes, then water cooling, the chain running speed is 0.19 m / min during quenching , enter the heat preservation zone for uniform temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace;
  • the mooring chain enters the heating zone and raises the temperature to about 600 °C;
  • the temperature of the mooring chain in the tempering temperature heating zone is controlled at 690 ° C, after entering the heat preservation zone, the temperature is controlled at 640 ° C, and the temperature is kept for 190 minutes, and then water cooling is performed again, and the running speed of the control chain is tempered. 0.19m/min, enter the heat preservation zone for average temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace.
  • the invention has the following advantages: 1) The present invention is directed to the R6 grade mooring chain toughness and the requirements of the relevant classification society, taking into account the sample heat treatment test conditions and the environment and equipment of the equipment and the mass production mooring chain. Difference, the final use of special steel designed according to quenching and tempering; 2), the invention in the R6 grade mooring chain manufacturing process, the quenching and tempering temperature is controlled, so that the material and the use of the material The mechanical properties of the link are greatly improved; 3) The invention satisfies the requirements of heat treatment of the R6 mooring chain, strictly controls the heating temperature and the moving speed of the chain, and ensures that the chain can absorb enough heat during the quenching process.
  • the transformation of austenite is fully realized; at the same time, the chain can realize the expected transformation of the internal structure of the material during the tempering treatment; the invention can be widely used for the mass production of the R6 mooring chain on the deep sea drilling platform and In the manufacturing process, the promotion and application have good economic and social benefits.
  • a R6 mooring chain heat treatment process comprising the following steps:
  • the chain is preheated by using the rising furnace gas through the preheating zone.
  • the mooring chain enters the rapid heating zone and raises the temperature to above 700 °C;
  • the temperature of the mooring chain in the quenching temperature heating zone is controlled at 1000 ⁇ 1050 ° C, after entering the holding zone, the temperature is controlled at 980 ⁇ 1020 ° C, and the temperature is maintained for 150 ⁇ 200 minutes, then water cooling, chain running during quenching The speed is 0.12 ⁇ 0.20m/min, and the temperature is entered into the heat preservation zone, which is equivalent to the heat preservation of the ordinary chamber furnace or the trolley furnace;
  • the quenching temperature is higher than the universal quenching temperature by more than 100 ° C, which not only improves the strength of the chain, but also makes the chain weld composition more uniform, improves the toughness and fracture toughness of the chain weld, and reduces the performance difference between the ring back and the weld.
  • the requirements of the narrow strength range are met; the running speed of the control chain is mainly used to ensure that the chain absorbs enough heat during the quenching process to fully realize the transformation of austenite;
  • the mooring chain enters the heating zone and raises the temperature to about 600 °C;
  • the chain temperature will decrease at the top, and the first zone after the passing guide wheel will usually heat up again according to the appropriate temperature;
  • the temperature of the mooring chain in the tempering temperature heating zone is controlled at 600 ⁇ 700 ° C, after entering the heat preservation zone, the temperature is controlled at 600 ⁇ 650 ° C, and the temperature is maintained for 150 ⁇ 200 minutes, and then water cooling again, tempering
  • the operating speed of the control chain is 0.12 ⁇ 0.20m/min, and the temperature is entered into the heat preservation zone, which is equivalent to the heat preservation of the ordinary chamber furnace or the trolley furnace;
  • This tempering temperature is 50 °C higher than the temperature of common high temperature tempering, one is to satisfy The need for furnace temperature control, the second is to facilitate the precipitation and distribution of carbides in the material; and the operating speed of the control chain can achieve the expected transformation of the internal structure of the material, increasing the tempering time can fully dissolve the alloying elements and improve the chain Comprehensive performance.
  • a R6 mooring chain heat treatment process comprising the following steps:
  • the mooring chain enters the rapid heating zone and raises the temperature to above 700 °C;
  • the temperature of the mooring chain in the quenching temperature heating zone is controlled at 1045 ° C, after entering the holding zone, the temperature is controlled at 1015 ° C, and the temperature is kept for 190 minutes, then water cooling, the chain running speed is 0.19 m / min during quenching , enter the heat preservation zone for uniform temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace;
  • the mooring chain enters the heating zone and raises the temperature to about 600 °C;
  • the temperature of the mooring chain in the tempering temperature heating zone is controlled at 690 ° C, after entering the heat preservation zone, the temperature is controlled at 640 ° C, and the temperature is kept for 190 minutes, and then water cooling is performed again, and the running speed of the control chain is tempered. 0.19m/min, enter the heat preservation zone for average temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace.
  • the present invention is directed to the R6 grade mooring chain strength and toughness coordination requirement
  • the R6 grade mooring chain steel is specially designed special steel, and according to the regulations of the relevant classification society, the sample heat treatment test conditions, equipment and large quantities are considered.
  • the difference between the environment and equipment for the production of the mooring chain was determined by practice: the metallographic structure finally obtained after the above-mentioned quenching and tempering treatment of the chain is mainly tempered sorbite, and its tensile strength is 1160 MPa, and the impact energy is 80 J, which fully satisfies For the R6 grade mooring chain toughness and coordination requirements.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

A process for the heat treatment of a Grade R6 mooring chain, comprising the following steps: A) bringing a mooring chain into a quenching furnace barrel followed by preheating; B) bringing the mooring chain into a rapid heating region; C) controlling the temperature of the mooring chain in a quenching temperature heating region at 1045ºC, controlling the temperature at 1015 ºC after bringing the mooring chain into a temperature maintaining region, maintaining the temperature for 190 minutes, followed by water cooling, the running speed of the chain during quenching being 0.19 m/minute; D) bringing the mooring chain into a tempering furnace barrel followed by preheating; E) bringing the mooring chain into a heating region; and F) controlling the temperature of the mooring chain in a tempering temperature heating region at 690ºC, controlling the temperature at 640ºC after bringing the mooring chain into a temperature maintaining region, maintaining the temperature for 190 minutes, followed by water cooling again.

Description

一种R6级系泊链热处理工艺R6 grade mooring chain heat treatment process 技术领域Technical field
本发明涉及一种海洋系泊链，特别涉及一种R6级系泊链热处理工艺。The invention relates to a marine mooring chain, in particular to a R6 grade mooring chain heat treatment process.
背景技术Background technique
随着海洋开发和海工行业的发展，市场对系泊链提出了更高的要求。R6级系泊链就是新开发的具有高强度和韧性的系泊链，其抗拉强度≥1110MPa，V型缺口冲击≥58J。由于R6级系泊链具有较大的热处理敏感性，因此在工艺设计或执行工艺时，如果热处理工艺稍有差异，对R6级系泊链性能的影响就很大。由此可见，热处理工艺是R6系泊链制造过程中的关键技术之一。因此必须通过合理的热处理工艺控制R6级系泊链链环的焊缝与母材的强度,使其满足船级社的规范要求，并且能够实现大批量生产。With the development of the marine industry and the offshore industry, the market has placed higher demands on the mooring chain. The R6 mooring chain is a newly developed mooring chain with high strength and toughness. Its tensile strength is ≥1110MPa, and the V-notch impact is ≥58J. Since the R6 mooring chain has a large heat treatment sensitivity, if the heat treatment process is slightly different in the process design or execution process, the influence on the performance of the R6 mooring chain is great. It can be seen that the heat treatment process is one of the key technologies in the R6 mooring chain manufacturing process. Therefore, the strength of the weld and base metal of the R6 mooring chain link must be controlled by a reasonable heat treatment process to meet the requirements of the classification society and to achieve mass production.
系泊链热处理是系泊链制造的一个关键过程，一方面要通过热处理来改善焊缝质量，另一方面要通过淬火+高温回火的调质工艺,使材料的强韧性得到最佳的匹配效果，因此合理的热处理工艺制度将直接影响系泊链的使用性能。由于系泊链特殊的使用环境，其长度往往超过1000米。对于这种产品，传统的热处理炉显然无法满足要求，而矿用圆环链通常使用感应加热淬火，但其规格往往不超过直径40mm，而系泊链最小规格也有50mm，常用规格都在90mm左右，因此并不适用。所以系泊链处理应使用立式连续调质炉，通过导轮使链条在炉筒中连续运行以实现加热或保温。要保证R6系泊链的热处理效果，一是要进行不同参数匹配的热处理试验，以获得最优化的参数；二是要改进热处理设备，从控制精度和稳定性方面对工艺进行保障，同时在生产过程中，严密监控热处理参数和过程，保证产品质量。 Mooring chain heat treatment is a key process in the manufacture of mooring chains. On the one hand, heat treatment is used to improve the quality of welds. On the other hand, quenching + high temperature tempering is used to optimize the toughness of materials. The effect, so a reasonable heat treatment process system will directly affect the performance of the mooring chain. Due to the special use environment of the mooring chain, its length often exceeds 1000 meters. For this kind of product, the traditional heat treatment furnace obviously can not meet the requirements, and the mining ring chain is usually quenched by induction heating, but its specifications often do not exceed 40mm in diameter, while the mooring chain has a minimum specification of 50mm, and the common specifications are about 90mm. And therefore does not apply. Therefore, the mooring chain treatment should use a vertical continuous tempering furnace, and the chain is continuously operated in the furnace through the guide wheel to achieve heating or heat preservation. To ensure the heat treatment effect of the R6 mooring chain, one is to carry out heat treatment test with different parameters to obtain the optimized parameters; the second is to improve the heat treatment equipment, to guarantee the process from the aspects of control precision and stability, and at the same time in production During the process, the heat treatment parameters and processes are closely monitored to ensure product quality.
发明内容Summary of the invention
本发明的目的要解决上述技术问题。The object of the present invention is to solve the above technical problems.
本发明的目的是这样实现的：一种R6级系泊链热处理工艺：包括以下步骤：The object of the present invention is achieved by an R6 grade mooring chain heat treatment process comprising the following steps:
A)、系泊链链条进入淬火炉筒后，首先通过预热区使用上升的炉气对链环进行预热使其温度达到300～500℃；A), after the mooring chain enters the quenching furnace, firstly preheating the chain ring through the preheating zone using the rising furnace gas to reach a temperature of 300-500 ° C;
B)、系泊链链条进入快速加热区，将温度提升到700℃以上；B), the mooring chain enters the rapid heating zone and raises the temperature to above 700 °C;
C)、将系泊链链条在淬火温度加热区温度控制在1045℃，进入保温区后，温度控制在1015℃，并保温190分钟，然后进行水冷，淬火时链条的运行速度为0.19m/min，进入保温区进行均温，相当于普通室式炉或台车炉的保温；C), the temperature of the mooring chain in the quenching temperature heating zone is controlled at 1045 ° C, after entering the holding zone, the temperature is controlled at 1015 ° C, and the temperature is kept for 190 minutes, then water cooling, the chain running speed is 0.19 m / min during quenching , enter the heat preservation zone for uniform temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace;
D)、系泊链链条进入回火炉筒后，通过预热区加热到300℃左右；D), after the mooring chain enters the tempering furnace, it is heated to about 300 ° C through the preheating zone;
E)、系泊链链条进入加热区，将温度提升到600℃左右；E), the mooring chain enters the heating zone and raises the temperature to about 600 °C;
F)、将系泊链链条在回火温度加热区温度控制在690℃，进入保温区后，温度控制在640℃，并保温190分钟，然后再次进行水冷，回火时控制链条的运行速度为0.19m/min，进入保温区进行均温，相当于普通室式炉或台车炉的保温。F), the temperature of the mooring chain in the tempering temperature heating zone is controlled at 690 ° C, after entering the heat preservation zone, the temperature is controlled at 640 ° C, and the temperature is kept for 190 minutes, and then water cooling is performed again, and the running speed of the control chain is tempered. 0.19m/min, enter the heat preservation zone for average temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace.
本发明其具有以下优点：1)、本发明针对R6级系泊链强韧性配合要求和相关船级社的规定，考虑到样品热处理试验条件和设备与大批量生产系泊链的环境和设备的差异，最终采用了按调质处理设计的特种钢；2)、本发明在R6级系泊链的制造过程中，对淬火和回火温度进行了控制，从而使该材料及用该材料制造的链环的力学性能得到了很大改善；3)、本发明为满足R6级系泊链热处理的要求,严格控制了链条的加热温度和运动速度,保证了链条在淬火过程中能够吸收足够的热量,充分实现了奥氏体的转化；同时也保证了回火处理时，链条能够实现预期的材料内部组织的转变；本发明能广泛用于深海钻井平台上的R6级系泊链的批量生产和制造过程中，推广应用具有良好的经济和社会效益。 The invention has the following advantages: 1) The present invention is directed to the R6 grade mooring chain toughness and the requirements of the relevant classification society, taking into account the sample heat treatment test conditions and the environment and equipment of the equipment and the mass production mooring chain. Difference, the final use of special steel designed according to quenching and tempering; 2), the invention in the R6 grade mooring chain manufacturing process, the quenching and tempering temperature is controlled, so that the material and the use of the material The mechanical properties of the link are greatly improved; 3) The invention satisfies the requirements of heat treatment of the R6 mooring chain, strictly controls the heating temperature and the moving speed of the chain, and ensures that the chain can absorb enough heat during the quenching process. The transformation of austenite is fully realized; at the same time, the chain can realize the expected transformation of the internal structure of the material during the tempering treatment; the invention can be widely used for the mass production of the R6 mooring chain on the deep sea drilling platform and In the manufacturing process, the promotion and application have good economic and social benefits.
具体实施方式detailed description
下面对本发明作进一步说明，但不作为对本发明的限制：The invention is further illustrated below, but is not to be construed as limiting the invention:
一种R6级系泊链热处理工艺，包括以下步骤：A R6 mooring chain heat treatment process comprising the following steps:
A)、系泊链链条进入淬火炉筒后，首先通过预热区使用上升的炉气对链环进行预热使A) After the mooring chain enters the quenching furnace, the chain is preheated by using the rising furnace gas through the preheating zone.
其温度达到300～500℃；Its temperature reaches 300 ~ 500 ° C;
B)、系泊链链条进入快速加热区，将温度提升到700℃以上；B), the mooring chain enters the rapid heating zone and raises the temperature to above 700 °C;
C)、将系泊链链条在淬火温度加热区温度控制在1000～1050℃，进入保温区后，温度控制在980～1020℃，并保温150～200分钟，然后进行水冷，淬火时链条的运行速度为0.12～0.20m/min，进入保温区进行均温，相当于普通室式炉或台车炉的保温；C), the temperature of the mooring chain in the quenching temperature heating zone is controlled at 1000 ~ 1050 ° C, after entering the holding zone, the temperature is controlled at 980 ~ 1020 ° C, and the temperature is maintained for 150 ~ 200 minutes, then water cooling, chain running during quenching The speed is 0.12~0.20m/min, and the temperature is entered into the heat preservation zone, which is equivalent to the heat preservation of the ordinary chamber furnace or the trolley furnace;
该淬火温度比通用淬火温度提高100℃以上，不仅提高了链条的强度，而且使链条焊缝成分更加均匀，提高链条焊缝的韧性和断裂韧性，减少了环背和焊缝之间的性能差别，达到了窄强度范围的要求；控制链条的运行速度主要是用来保证链条在淬火的过程中吸收足够的热量，充分实现奥氏体的转化；The quenching temperature is higher than the universal quenching temperature by more than 100 ° C, which not only improves the strength of the chain, but also makes the chain weld composition more uniform, improves the toughness and fracture toughness of the chain weld, and reduces the performance difference between the ring back and the weld. The requirements of the narrow strength range are met; the running speed of the control chain is mainly used to ensure that the chain absorbs enough heat during the quenching process to fully realize the transformation of austenite;
D)、系泊链链条进入回火炉筒后，通过预热区加热到300℃左右；D), after the mooring chain enters the tempering furnace, it is heated to about 300 ° C through the preheating zone;
E)、系泊链链条进入加热区，将温度提升到600℃左右；E), the mooring chain enters the heating zone and raises the temperature to about 600 °C;
由于链条在回火炉中路径较长，且顶部导轮区域没有加热元件，因此链条温度在顶部会有所下降，过导轮后的第一个区通常会适当提高温度再次加热；Since the chain has a long path in the tempering furnace and there is no heating element in the top guide wheel area, the chain temperature will decrease at the top, and the first zone after the passing guide wheel will usually heat up again according to the appropriate temperature;
F)、将系泊链链条在回火温度加热区温度控制在600～700℃，进入保温区后，温度控制在600～650℃，并保温150～200分钟，然后再次进行水冷，回火时控制链条的运行速度为0.12～0.20m/min，进入保温区进行均温，相当于普通室式炉或台车炉的保温；F), the temperature of the mooring chain in the tempering temperature heating zone is controlled at 600 ~ 700 ° C, after entering the heat preservation zone, the temperature is controlled at 600 ~ 650 ° C, and the temperature is maintained for 150 ~ 200 minutes, and then water cooling again, tempering The operating speed of the control chain is 0.12~0.20m/min, and the temperature is entered into the heat preservation zone, which is equivalent to the heat preservation of the ordinary chamber furnace or the trolley furnace;
此回火温度比常见高温回火的温度提高50℃，一是为了满足 炉温控制的需求，二是有利于材料中的碳化物的析出和分布；而控制链条的运行速度能够实现预期的材料内部组织的转变，增加回火时间可以使合金元素充分溶解从而提高链条的综合性能。This tempering temperature is 50 °C higher than the temperature of common high temperature tempering, one is to satisfy The need for furnace temperature control, the second is to facilitate the precipitation and distribution of carbides in the material; and the operating speed of the control chain can achieve the expected transformation of the internal structure of the material, increasing the tempering time can fully dissolve the alloying elements and improve the chain Comprehensive performance.
实施例1Example 1
一种R6级系泊链热处理工艺，包括以下步骤：A R6 mooring chain heat treatment process comprising the following steps:
A)、系泊链链条进入淬火炉筒后，首先通过预热区使用上升的炉气对链环进行预热使其温度达到300～500℃；A), after the mooring chain enters the quenching furnace, firstly preheating the chain ring through the preheating zone using the rising furnace gas to reach a temperature of 300-500 ° C;
B)、系泊链链条进入快速加热区，将温度提升到700℃以上；B), the mooring chain enters the rapid heating zone and raises the temperature to above 700 °C;
C)、将系泊链链条在淬火温度加热区温度控制在1045℃，进入保温区后，温度控制在1015℃，并保温190分钟，然后进行水冷，淬火时链条的运行速度为0.19m/min，进入保温区进行均温，相当于普通室式炉或台车炉的保温；C), the temperature of the mooring chain in the quenching temperature heating zone is controlled at 1045 ° C, after entering the holding zone, the temperature is controlled at 1015 ° C, and the temperature is kept for 190 minutes, then water cooling, the chain running speed is 0.19 m / min during quenching , enter the heat preservation zone for uniform temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace;
D)、系泊链链条进入回火炉筒后，通过预热区加热到300℃左右；D), after the mooring chain enters the tempering furnace, it is heated to about 300 ° C through the preheating zone;
E)、系泊链链条进入加热区，将温度提升到600℃左右；E), the mooring chain enters the heating zone and raises the temperature to about 600 °C;
F)、将系泊链链条在回火温度加热区温度控制在690℃，进入保温区后，温度控制在640℃，并保温190分钟，然后再次进行水冷，回火时控制链条的运行速度为0.19m/min，进入保温区进行均温，相当于普通室式炉或台车炉的保温。F), the temperature of the mooring chain in the tempering temperature heating zone is controlled at 690 ° C, after entering the heat preservation zone, the temperature is controlled at 640 ° C, and the temperature is kept for 190 minutes, and then water cooling is performed again, and the running speed of the control chain is tempered. 0.19m/min, enter the heat preservation zone for average temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace.
具体实施时，本发明针对R6级系泊链强韧性配合要求，R6级系泊链的钢材是专门设计的特种钢，根据相关船级社的规定，考虑了样品热处理试验条件、设备与大批量生产系泊链的环境和设备的差异，经实践测定：链条经上述调质处理后最终得到的金相组织主要是回火索氏体，其抗拉强度为1160MPa，冲击功80J，完全满足了对R6级系泊链强韧性配合要求。In specific implementation, the present invention is directed to the R6 grade mooring chain strength and toughness coordination requirement, and the R6 grade mooring chain steel is specially designed special steel, and according to the regulations of the relevant classification society, the sample heat treatment test conditions, equipment and large quantities are considered. The difference between the environment and equipment for the production of the mooring chain was determined by practice: the metallographic structure finally obtained after the above-mentioned quenching and tempering treatment of the chain is mainly tempered sorbite, and its tensile strength is 1160 MPa, and the impact energy is 80 J, which fully satisfies For the R6 grade mooring chain toughness and coordination requirements.
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。 It is to be understood that the above embodiments are merely exemplary embodiments employed to explain the principles of the invention, but the invention is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and scope of the invention. These modifications and improvements are also considered to be within the scope of the invention.

Claims (1)

  1. 一种R6级系泊链热处理工艺，其特征在于：包括以下步骤：An R6 mooring chain heat treatment process characterized by comprising the steps of:
    A)、系泊链链条进入淬火炉筒后，首先通过预热区使用上升的炉气对链环进行预热使其温度达到300～500℃；A), after the mooring chain enters the quenching furnace, firstly preheating the chain ring through the preheating zone using the rising furnace gas to reach a temperature of 300-500 ° C;
    B)、系泊链链条进入快速加热区，将温度提升到700℃以上；B), the mooring chain enters the rapid heating zone and raises the temperature to above 700 °C;
    C)、将系泊链链条在淬火温度加热区温度控制在1045℃，进入保温区后，温度控制在1015℃，并保温190分钟，然后进行水冷，淬火时链条的运行速度为0.19m/min，进入保温区进行均温，相当于普通室式炉或台车炉的保温；C), the temperature of the mooring chain in the quenching temperature heating zone is controlled at 1045 ° C, after entering the holding zone, the temperature is controlled at 1015 ° C, and the temperature is kept for 190 minutes, then water cooling, the chain running speed is 0.19 m / min during quenching , enter the heat preservation zone for uniform temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace;
    D)、系泊链链条进入回火炉筒后，通过预热区加热到300℃左右；D), after the mooring chain enters the tempering furnace, it is heated to about 300 ° C through the preheating zone;
    E)、系泊链链条进入加热区，将温度提升到600℃左右；E), the mooring chain enters the heating zone and raises the temperature to about 600 °C;
    F)、将系泊链链条在回火温度加热区温度控制在690℃，进入保温区后，温度控制在640℃，并保温190分钟，然后再次进行水冷，回火时控制链条的运行速度为0.19m/min，进入保温区进行均温，相当于普通室式炉或台车炉的保温。 F), the temperature of the mooring chain in the tempering temperature heating zone is controlled at 690 ° C, after entering the heat preservation zone, the temperature is controlled at 640 ° C, and the temperature is kept for 190 minutes, and then water cooling is performed again, and the running speed of the control chain is tempered. 0.19m/min, enter the heat preservation zone for average temperature, which is equivalent to the insulation of ordinary chamber furnace or trolley furnace.
PCT/CN2016/105386 2016-05-30 2016-11-11 Process for heat treatment of grade r6 mooring chain WO2017206441A1 (en)

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CN109517962A (en) * 2018-12-08 2019-03-26 江苏亚星锚链股份有限公司 A kind of big specification mooring cable heat-treatment production line
CN109457085A (en) * 2018-12-08 2019-03-12 江苏亚星锚链股份有限公司 A kind of heat treatment process of mooring cable
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