WO2016078200A1 - 高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线 - Google Patents

高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线 Download PDF

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WO2016078200A1
WO2016078200A1 PCT/CN2015/000803 CN2015000803W WO2016078200A1 WO 2016078200 A1 WO2016078200 A1 WO 2016078200A1 CN 2015000803 W CN2015000803 W CN 2015000803W WO 2016078200 A1 WO2016078200 A1 WO 2016078200A1
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Prior art keywords
martensite
production line
salt bath
bearing steel
chromium bearing
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PCT/CN2015/000803
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English (en)
French (fr)
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解连文
魏长富
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唐山亚捷机械有限公司
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Publication of WO2016078200A1 publication Critical patent/WO2016078200A1/zh

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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
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/20—Isothermal quenching, e.g. bainitic hardening
    • 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
    • C21D1/19—Hardening; Quenching with or without subsequent tempering by interrupted quenching
    • C21D1/22—Martempering
    • 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
    • C21D1/62—Quenching devices

Definitions

  • the invention relates to a quenching production line of a heat treatment industry, in particular to a martensite and bainite isothermal salt bath quenching production line of high chromium bearing steel parts, and can be extended to martensite quenching and white cast iron of carburized steel parts, Austemper quenching of bainite in ductile iron molds.
  • martensite and bainite quenching processes such as high-chromium bearing steel parts are generally applied to large-volume, moderately sized bearing ring parts.
  • large bearing rings there is currently no relatively cost-effective equipment.
  • the box type multi-purpose furnace has strict restrictions on the loading weight and the charging volume.
  • the pushing and pulling mechanism of the charging device is prone to failure due to the high temperature environment in the furnace, and is not convenient for maintenance;
  • the continuous roller bar furnace is mainly for large Mass production, but it is not easy to stop production for small batches, and the price of equipment for large bearing ring workpieces is very expensive; although the pit furnace is easy to heat large ferrule parts, it needs to use the crane, and the transfer time is long. It is not easy to automate.
  • the invention aims to solve the problems described in the background art, and provides a martensite and bainite isothermal salt bath which is flexible and suitable for small-volume, multi-varietal ferrule products and high-chromium bearing steel parts of large parts. Quenching production line.
  • a martensite and bainite isothermal salt bath quenching production line for a high chromium bearing steel part comprising an equipment unit, the equipment unit comprising a loading platform arranged in sequence, a preheating furnace, a cover type main heating furnace, a quenching salt tank
  • the isothermal salt tank, the air cooling station, the two-liquid cleaning machine and the unloading station further comprise a transfer material truck for transferring the workpiece to the equipment unit, and the preheating furnace and the cover type main heating furnace can be accessed.
  • Protect gas and rich gas are examples of a transfer material truck for transferring the workpiece to the equipment unit.
  • the production line is equipped with a preheating furnace.
  • a preheating furnace When the workpiece is heated in the main heating furnace, another batch of workpieces can be preheated in the preheating furnace to improve production efficiency; the workpiece with complex shape and thick wall thickness is slowly heated in the preheating furnace. Avoid cracking; when the temperature of the preheating furnace is low, the protective atmosphere and rich gas may not be introduced, the use of the atmosphere is reduced, and the cost is saved;
  • the production line adopts the form of hood type main heating furnace, which can design large-size charging capacity according to customer's requirements. At the same time, because the moving parts are designed outside the furnace, the service life is long and the maintenance is convenient;
  • the quenching salt tank of the production line can be used as a workpiece tempering tank for martensite quenching of the workpiece, and heat the workpiece to be tempered at normal temperature by using the heat released when the workpiece is lowered from high temperature to low temperature during quenching;
  • the production line has a multi-station isothermal salt tank for martensite tempering or bainite isothermal transformation to improve production efficiency;
  • the production line is equipped with a transfer material truck, which does not rely on the crane to transfer the workpiece, the quenching transfer time is short, and the process is reliable;
  • the production line can adopt periodic production, which can realize the dry work of the workpiece, the instant heat preservation without workpiece, and the production capacity is high due to the large amount of single charge;
  • the cover type main heating furnace is adopted, and the heating furnace has good sealing performance, and the quenching treatment of the carburized steel can be realized under the protective atmosphere and the rich atmosphere;
  • the production line solves the drawbacks and limitations of small batch, multi-variety and large bearing ring type martensite and bainite quenching.
  • the production line can be designed as a semi-automatic or fully automatic production line to improve production efficiency. , reduce labor intensity.
  • the equipment units are arranged in a lateral direction, and the transfer material cart is arranged on a linear guide corresponding to the equipment unit.
  • the equipment units are arranged in a circular arrangement in sequence, and the transfer material cart is arranged at the center of the annularly arranged equipment unit by a swing support.
  • the cover type main heating furnace and the preheating furnace are respectively provided with a lifting cylinder, a transmission chain system, and a weighting device for reducing the load of the cylinder.
  • the quenching salt tank and the isothermal salt tank are respectively provided with a lifting cylinder, a transmission chain system, a salt agitator and a lifting platform.
  • the air cooling station is provided with a fan for cooling the workpiece.
  • the two-liquid cleaning machine is provided with a clear water tank and an alkali water tank, a lifting cylinder, a transmission chain system, a foaming tube in the tank and a lifting platform.
  • the transfer material truck is provided with a fork extension system, a lifting cylinder, a lifting platform and a trolley running mechanism.
  • the lifting platform is placed on the traveling mechanism of the cart through the lifting cylinder, the lifting cylinder drives the lifting platform, the lifting platform and the material
  • the fork telescopic system is linked.
  • FIG. 1 is a schematic diagram of a horizontal layout according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a ring layout according to an embodiment of the present invention.
  • Figure 3 is a schematic view showing the structure of a cover type main heating furnace and a transfer material vehicle
  • Figure 4 is a schematic view of the quenching salt tank structure
  • Figure 5 is a schematic view showing the structure of a two-liquid cleaning machine
  • loading station 1 preheating furnace 2, cover type main heating furnace 3, quenching salt tank 4, isothermal salt tank 5, air cooling station 6, double liquid cleaning machine 7, unloading station 8, transfer material truck 9.
  • the martensite and bainite isothermal salt bath quenching production line provided in the embodiment includes the loading station 1, the preheating furnace 2, the cover type main heating furnace 3, and the quenching salt.
  • Tank 4 isothermal salt tank 5, air cooling station 6, double liquid washing machine 7, unloading station 8, transfer material truck 9; each equipment unit can be arranged in a horizontal straight line in sequence, when the horizontal line is arranged, the transfer material truck 9 is arranged On the linear guide corresponding to each equipment unit; each equipment unit can also be arranged in a circular arrangement in sequence, and when the annular arrangement is arranged, the transfer material cart 9 is arranged at the center of the annularly arranged equipment unit, and the cart running mechanism of the material transfer vehicle 9 94 uses a slewing bearing to achieve a rotary motion, which greatly shortens the quenching process time of the production line and makes the arrangement more compact.
  • the loading table 1 is used for pre-positioning of the workpiece; the unloading table 8 is used for workpiece discharge placement: the air cooling station 6 is provided with a fan for workpiece cooling.
  • the hood type main heating furnace 3 is provided with a lifting cylinder 31, a transmission chain system 32, and a counterweight device 33 for reducing the load of the cylinder 31;
  • the hopper 9 is provided with a fork retracting system 91 and a lifting cylinder 92.
  • the lifting platform 93, the cart running mechanism 94, and the lifting platform 93 are placed on the cart running mechanism 94 via the lift cylinder 92.
  • the lift cylinder 92 drives the lifting platform 93, and the lifting platform 93 is interlocked with the fork telescopic system 91.
  • the structure of the preheating furnace 2 is the same as that of the hood type main heating furnace 3.
  • the quenching salt tank 4 is provided with a lift cylinder 41, a drive train system 42, a salt agitator 43 and a lifting platform 44.
  • the structural principle of the isothermal salt bath 5 is the same as that of the quenching tank 4.
  • the two-liquid cleaning machine 7 is provided with a clean water tank and an alkali water tank, a lift cylinder 71, a transmission chain system 72, an in-tank foaming tube 73, and a lifting platform 74.
  • the material transfer truck 9 takes the material: the material fork telescopic system 91 drives the material fork to extend into the bottom of the workpiece: the lifting oil cylinder 92 drives the lifting platform 93 to rise, the lifting platform 93 and the material fork expansion system 91 rise, and the workpiece is lifted; The system 91 is retracted to bring the workpiece back to the skip; the lift cylinder 92 is lowered, and the lift platform 93 is placed on the cart travel mechanism 94. When the cart is traveling, the cylinder is not subjected to force.
  • the feed material truck 9 feeds: the oil cylinder 92 drives the lifting platform 93 to rise, the lifting platform 93 and the material fork telescopic system 91 rise to lift the workpiece; the material fork telescopic system 91 drives the workpiece into the working equipment; the lifting cylinder 92 descends The lifting platform 93 and the fork telescopic system 91 are lowered, and the workpiece is placed on the platform or the lifting platform on each working device; the telescopic system 91 drives the material fork to retreat.
  • the fork telescopic system 91 does not perform the retreating action, but the cart running mechanism 94 directly drives the workpiece to the quenching salt tank 4, and places the workpiece on the lifting platform 74.
  • the lifting platform 74 is lowered to immerse the workpiece in the molten salt, and the workpiece is moved up and down in the salt tank to improve the molten salt flow on the surface of the workpiece.
  • the isothermal salt tank 5 with the independent lifting system and the two-liquid cleaning machine 7 are connected to the workpiece conveyed by the material transfer vehicle 9 After the fork exits and descends, it is immersed in molten salt and alkaline water to carry out the corresponding bainite isothermal transformation or martensite tempering and workpiece cleaning process.
  • the workpiece is transferred to the preheating furnace 2 through the transfer material truck 9: after preheating to the temperature, the workpiece is accurately transferred to the main cover type heating furnace 3 by the transfer material truck 9
  • the protective atmosphere is heated to austenite, and the next batch of workpieces can be loaded into the preheating furnace 2; after the heating in the main hood heating furnace 3 is completed, the furnace cover is lifted, and the transfer material truck 9 is used.
  • the red hot workpiece is rapidly transferred laterally to the lifting platform of the quenching salt tank 4; the quenching salt tank 4 automatically immerses the workpiece into the molten salt of the quenching salt tank according to the process requirement to realize martensite transformation; after the martensite transformation is completed, it is transferred.
  • the material truck 9 is transferred to the air cooling station 6 for air cooling process; afterwards, the tempering process of the workpiece can be completed in the quenching salt tank 4 (ie, quenching and tempering in the same tank, saving energy), or by converting the material 9 transferred to the isothermal salt tank 5 for tempering process; the tempered finished workpiece is transferred from the transfer material truck 9 to the two-liquid cleaning machine 7 for cleaning work (alkaline water cleaning, water cleaning); finally by the transfer material truck 9 Transfer to the unloading station 8.
  • the tempering process of the workpiece can be completed in the quenching salt tank 4 (ie, quenching and tempering in the same tank, saving energy), or by converting the material 9 transferred to the isothermal salt tank 5 for tempering process; the tempered finished workpiece is transferred from the transfer material truck 9 to the two-liquid cleaning machine 7 for cleaning work (alkaline water cleaning, water cleaning); finally by the transfer material truck 9 Transfer to the unloading station 8.
  • the quenching process of bainite is the same as that of martensite in the charging mode and heating mode.
  • the workpiece is transferred to the quenching tank 4 by the converter truck 9 for salt bath quenching, when the workpiece temperature When the bainite transformation temperature is lowered, the bainite transformation process can be completed in the quenching tank 4, or the converter material 9 can be transferred to the isothermal salt 5 tank for isothermal transformation to increase the yield.
  • the workpiece is transferred to the air-cooling table 6 by the transfer material cart 9 for air-cooling process.
  • the transfer material truck 9 is transferred to the two-liquid cleaning machine 7 for cleaning work, and then transferred to the loading and unloading station 8 On, prepare to cut.
  • the cover type main heating furnace 3 is introduced into a protective atmosphere during heating to reduce oxidation and decarburization of the parts; salt bath quenching of the carburized steel can be realized by introducing rich gas into the main furnace 3 of the cover type.
  • the bainite austempering process of the production line of the embodiment can be directly used for austemper quenching of bainite of white cast iron and ductile iron parts.

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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)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
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Abstract

一种高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，包括设备单元，所述设备单元包括依次排列的装料台(1)、预热炉(2)、罩式主加热炉(3)、淬火盐槽(4)、等温盐槽(5)、风冷台(6)、双液清洗机(7)、卸料台(8)，还包括一台为所述设备单元转运工件的转料料车(9)。

Description

高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线 技术领域
本发明涉及热处理行业的淬火生产线，具体是一种高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，并可扩展到渗碳钢零件的马氏体淬火和白口铸铁、球墨铸铁霉件的贝氏体等温淬火。
背景技术
目前，诸如高铬轴承钢零件的马氏体、贝氏体淬火工艺，一般都针对大批量，尺寸规格适中的轴承套圈类零件等。对于较大轴承套圈，目前还没有相对性价比较好的设备。另外对于品种多，相对量又少的该类产品，也没有更好的设备去灵活处理。
例如，箱式多用炉对装料重量、装料体积有严格的限制，装料的推拉机构由于在炉内，处于高温环境，容易出现故障，且不便于维修；连续式辊棒炉主要针对大批量生产，而对于批量较小的情况不便于停产，且对于大型轴承套圈工件类的设备价格又非常昂贵；井式炉虽然加热大型套圈类零件容易，但需要使用天车，转移时间长，不易实现自动化。
发明内容
本发明旨在解决背景技术所述的问题，而提供一种具备灵活适用小批量，多品种的套圈类产品，以及大型零件的高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线。
本发明解决所述问题采用的技术方案是：
一种高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，包括设备单元，所述设备单元包括依次排列的装料台、预热炉、罩式主加热炉、淬火盐槽、等温盐槽、风冷台、双液清洗机、卸料台，还包括一台为所述设备单元转运工件的转料料车，所述的预热炉、罩式主加热炉可通入保护气和富化气。
采用上述技术方案的本发明，与现有技术相比，其突出特点是：
①生产线设有预热炉，工件在主加热炉加热的同时另一批工件可在预热炉内预热，提高生产效率；形状复杂、壁厚较厚的工件在预热炉内缓慢加热，避免开裂；预热炉温度低时可不通入保护气氛及富化气，减少气氛使用，节约成本；
②生产线采用罩式主加热炉形式，可根据客户需求，设计大尺寸装料容量，同时由于动作部件均设计在炉外，使用寿命长，维修方便；
③生产线的淬火盐槽为工件进行马氏体淬火的同时，可以作为工件回火槽使用，利用淬火时工件从高温降低到低温时释放的热量来加热待回火常温工件；
④生产线设有多工位的等温盐槽，用于马氏体回火或贝氏体等温转变，提高生产效率；
⑤生产线设有转料料车，不依赖天车转移工件，淬火转移时间短，工艺可靠；
⑥本生产线可采用周期式生产，实现有工件干活、无工件即时保温停止生产，同时由于单次装料量大，生产能力高；
⑦采用罩式主加热炉，加热炉密封性好，可在保护气氛、富化气氛下实现渗碳钢的淬火处理；
⑧可实现白口铸铁、球墨铸铁零件的贝氏体等温淬火；
综上所述，本生产线解决了小批量、多品种以及大型轴承套圈类马氏体、贝氏体淬火的弊端和使用局限，同时，本生产线可以设计为半自动或全自动生产线，提高生产效率，降低劳动强度。
作为优选，本发明更进一步的技术方案是：
所述设备单元依次横向排列，所述转料料车布置在与所述设备单元对应的直线导轨上。
所述设备单元依次环形排列布置，所述转料料车通过回转支撑布置在所述环形排列的设备单元中心。
所述的罩式主加热炉和所述的预热炉分别设有提升油缸、传动链系统、以及用于减轻油缸负荷的配重设备。
所述的淬火盐槽和所述的等温盐槽分别设有提升油缸、传动链系统、盐搅拌器和升降平台。
所述风冷台设有风机，用于工件冷却。
所述双液清洗机设有清水槽及碱水槽、提升油缸、传动链系统、槽内发泡管和升降平台。
所述转料料车设有料叉伸缩系统、升降油缸，升降平台，大车行走机构，所述升降平台通过升降油缸置于大车行走机构上，升降油缸驱动升降平台，升降平台与所述料叉伸缩系统联动。
附图说明
图1为本发明实施例的横向布局示意图；
图2为本发明实施例的环形布局示意图；
图3为罩式主加热炉与转料料车结构示意图；
图4为淬火盐槽结构示意图；
图5为双液清洗机结构示意图；
图中：装料台1，预热炉2，罩式主加热炉3，淬火盐槽4，等温盐槽5，风冷台6，双液清洗机7，卸料台8，转料料车9。
具体实施方式：
以下结合附图及实施例详述本发明，目的仅在于更好的理解本发明内容。
参见图1、图2，本实施例给出的马氏体、贝氏体等温盐浴淬火生产线，其设备单元包括：装料台1，预热炉2，罩式主加热炉3，淬火盐槽4，等温盐槽5，风冷台6，双液清洗机7，卸料台8，转料料车9；各设备单元可以依次横向直线排列，横向直线排列时，转料料车9布置在与各设备单元对应的直线导轨上；各设备单元还可以依次环形排列布置，环形排列布置时，转料料车9布置在环形排列的设备单元中心，转料料车9的大车行走机构94使用回转支撑轴承，实现旋转运动，从而使该生产线的淬火工艺时间大大缩短，布置也更加紧凑。
装料台1用于工件的预摆放；卸料台8用于工件卸料摆放：风冷台6设有风机，用于工件冷却。
参见图3，罩式主加热炉3设有提升油缸31、传动链系统32、以及用于减轻油缸31负荷的配重设备33；转料料车9设有料叉伸缩系统91、升降油缸92，升降平台93，大车行走机构94，升降平台93通过升降油缸92置于大车行走机构94上，升降油缸92驱动升降平台93，升降平台93与料叉伸缩系统91联动。
预热炉2结构原理与罩式主加热炉3相同。
参见图4，淬火盐槽4设有提升油缸41、传动链系统42、盐搅拌器43和升降平台44。
等温盐槽5结构原理与淬火槽4相同。
参见图5，双液清洗机7设有清水槽及碱水槽、提升油缸71、传动链系统72、槽内发泡管73和升降平台74。
本实施例所述生产线的工作步骤简述如下：
转料料车9取料：料叉伸缩系统91带动料叉伸入到工件底部：升降油缸92驱动升降平台93上升，升降平台93连带料叉伸缩系统91上升，将工件托起；料叉伸缩系统91缩回，将工件带回料车；升降油缸92下降，将升降平台93放在大车行走机构94上，大车大车行走时，油缸不受力。
转料料车9送料：油缸92驱动升降平台93上升，升降平台93连带料叉伸缩系统91上升，将工件托起；料叉伸缩系统91带动工件伸入到各工作设备上；升降油缸92下降，带动升降平台93、料叉伸缩系统91下降，将工件放在各工作设备上的平台或升降平台上；伸缩系统91带动料叉后退。
淬火过程：在转料料车9取料时，料叉伸缩系统91不执行后退动作，而是由大车行走机构94直接带动工件至淬火盐槽4上，将工件放在升降平台74上，料叉缩回，退出淬火盐槽范围后，升降平台74下降将工件浸入熔盐中，并使工件在盐槽内上下移动，提高工件表面熔盐流动。
设有独立升降系统的等温盐槽5、双液清洗机7在接到转料料车9运来的工件后，带料 叉退出后下降，分别浸入熔盐、碱水清水中，进行相应的贝氏体等温转变或马氏体回火、工件清洗工艺。
高铬轴承钢工件马氏体淬火工艺：
工件在装卸料台1上装料完毕，通过转料料车9把工件转移至预热炉2内：预热到温后再由转料料车9将工件准确转移到主罩式加热炉3内进行保护气氛加热，使其奥氏体化，同时下一批工件可以装入预热炉2内；主罩式加热炉3内工件在加热完成后，炉罩提起，使用转料料车9将红热工件横向快速转移至淬火盐槽4的升降台上；淬火盐槽4根据工艺要求，自动将工件浸入淬火盐槽熔盐内，实现马氏体转变；马氏体转变完成后被转料料车9转移到风冷台6进行风冷工艺；之后工件的回火工艺可以在淬火盐槽4内完成(即同槽淬火、回火，节省能耗)，也可以由转料料车9转移到等温盐槽5进行回火工艺；回火完成的工件由转料料车9转移至双液清洗机7进行清洗工作(分碱水清洗、清水清洗)；最后由转料料车9转移至卸料台8上。
高铬轴承钢工件贝氏体淬火工艺：
贝氏体的淬火工艺在装料方式、加热方式上与马氏体相同，不同点在工件经加热完成后由转料料车9将工件转移至淬火槽4上进行盐浴淬火，当工件温度降低到贝氏体转变温度时，贝氏体转变过程可以在淬火槽4内完成，也可以使用转料料车9转移至等温盐5槽进行等温转变以提高产量。等温淬火完成后由转料料车9将工件转移至风冷台6进行风冷工艺，冷却完成后由转料料车9转移到双液清洗机7进行清洗工作，之后转移至装卸料台8上，准备下料。
上述工件的转移工作全部由转料料车9完成。
罩式主加热炉3在加热时通入保护气氛，减小了零件的氧化、脱碳；在罩式主加热炉3内通入富化气可以实现渗碳钢的盐浴淬火。
本实施例所述生产线的贝氏体等温淬火工艺可直接用于白口铸铁、球墨铸铁零件的贝氏体等温淬火。

Claims (8)

  1. 一种高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，包括设备单元，其特征在于，所述设备单元包括依次排列的装料台、预热炉、罩式主加热炉、淬火盐槽、等温盐槽、风冷台、双液清洗机、卸料台，述包括一台为所述设备单元转运工件的转料料车：所述的预热炉、罩式主加热炉可通入保护气和富化气；所述等温盐槽包括多工位的等温盐槽。
  2. 根据权利要求1所述的高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，其特征在于，所述设备单元依次横向排列，所述转料料车布置在与所述设备单元对应的直线导轨上。
  3. 根据权利要求1所述的高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，其特征在于，所述设备单元依次环形排列布置，所述转料料车通过回转支撑布置在所述环形排列的设备单元中心。
  4. 根据权利要求1所述的高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，其特征在于，所述的罩式主加热炉和所述的预热炉分别设有提升油缸、传动链系统、以及用于减轻油缸负荷的配重设备。
  5. 根据权利要求1所述的高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，其特征在于，所述的淬火盐槽和所述的等温盐槽分别设有提升油缸、传动链系统、盐搅拌器和升降平台。
  6. 根据权利要求1所述的高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，其特征在于，所述风冷台设有风机，用于工件冷却。
  7. 根据权利要求1所述的高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，其特征在于，所述双液清洗机设有清水槽及碱水槽、提升油缸、传动链系统、槽内发泡管和升降平台。
  8. 根据权利要求1所述的高铬轴承钢零件的马氏体、贝氏体等温盐浴淬火生产线，其特征在于，所述转料料车设有料叉伸缩系统、升降油缸，升降平台，大车行走机构，所述升降平台通过升降油缸置于大车行走机构上，升降油缸驱动升降平台，升降平台与所述料叉伸缩系统联动。
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