技术领域technical field
本发明属于金属材料技术领域，涉及一种高铁白铜管材及其短流程生产方法。The invention belongs to the technical field of metal materials, and relates to a high-iron white copper pipe and a short-flow production method thereof.
背景技术Background technique
含铁白铜合金（简称铁白铜）管材具有较高的强度、良好的导热性能和耐腐蚀性能，广泛应用于火电、舰船、海水淡化等领域的冷凝管和热交换器管。其中，BFe10-1-1合金管材由于镍含量较低（～10wt%），成本较低，是目前工业用量最大的铁白铜管材。随着我国海洋工业的快速发展，对海水管系用铁白铜的耐腐蚀性能、使用寿命提出越来越高的要求，传统的BFe10-1-1管材难以满足使用要求。Iron-containing nickel-nickel alloy (referred to as iron-nickel) pipes have high strength, good thermal conductivity and corrosion resistance, and are widely used in condenser tubes and heat exchanger tubes in thermal power, ships, seawater desalination and other fields. Among them, the BFe10-1-1 alloy pipe has low nickel content (~10wt%) and low cost, and is currently the most widely used iron-nickel-nickel pipe in industry. With the rapid development of my country's marine industry, higher and higher requirements are put forward for the corrosion resistance and service life of iron-nickel copper used in seawater piping systems. The traditional BFe10-1-1 pipes are difficult to meet the requirements.
提高镍含量（例如镍含量为30wt%左右的BFe30-1-1合金），可显著提高铁白铜管材的腐蚀性能和力学性能，但导热性能下降，BFe30-1-1的导热性比BFe10-1-1下降30%左右，且由于镍较为昂贵，因此大幅提高镍含量不利于降低生产成本和大规模应用。Increasing the nickel content (such as BFe30-1-1 alloy with a nickel content of about 30wt%) can significantly improve the corrosion performance and mechanical properties of the iron-nickel copper pipe, but the thermal conductivity decreases, and the thermal conductivity of BFe30-1-1 is higher than that of BFe10-1 -1 decreased by about 30%, and because nickel is relatively expensive, a substantial increase in nickel content is not conducive to reducing production costs and large-scale applications.
铁和锰的价格低廉，提高铁和锰含量也可明显改善铁白铜的力学性能和耐腐蚀性能，其中铁元素对改善合金性能的效果更为显著，尤其可大幅度提高合金的抗海水冲刷腐蚀性能。但铁元素在基体中的存在形式显著影响铁白铜的耐腐蚀性能，当铁以第二相析出或以富镍、铁形成偏析组织时，合金的耐腐蚀性能下降，而铁以固溶态形式存在于合金基体时，可显著提高合金的耐腐蚀性能 [见：王伟勇，李建明，金焘，制冷系统冷凝器海水腐蚀研究，船舶工程，2009，Vol.31，No.3，p.70~74]。因此，如能在BFe10-1-1（铁含量为1.0～1.5wt%）合金中较大幅度提高铁含量，并合理控制铁元素在基体中的存在形式，是开发低成本、高耐蚀性能铁白铜管材的有效途径。The price of iron and manganese is low, and increasing the content of iron and manganese can also significantly improve the mechanical properties and corrosion resistance of iron-nickel nickel. Among them, the iron element has a more significant effect on improving the properties of the alloy, especially it can greatly improve the resistance to seawater erosion and corrosion of the alloy. performance. However, the existence form of iron element in the matrix significantly affects the corrosion resistance of iron-nickel-nickel copper. When iron is precipitated in the second phase or forms a segregated structure with rich nickel and iron, the corrosion resistance of the alloy decreases, while iron in the form of solid solution When it exists in the alloy matrix, it can significantly improve the corrosion resistance of the alloy [See: Wang Weiyong, Li Jianming, Jin Tao, Research on Seawater Corrosion of Refrigeration System Condenser, Ship Engineering, 2009, Vol.31, No.3, p.70~74 ]. Therefore, if the iron content can be greatly increased in the BFe10-1-1 (iron content is 1.0-1.5wt%) alloy, and the existence form of iron element in the matrix can be reasonably controlled, it is the development of low-cost, high corrosion resistance. An effective way for iron-nickel-nickel pipes.
提高铁白铜中铁含量导致的第二个问题是，合金的固溶强化和析出强化作用增强，铁白铜管材的变形抗力显著增大，加工硬化程度明显增加，塑性降低，导致后续加工成形困难且成材率低。目前，国内外铁白铜管材的主要生产方法为“半连铸实心铸锭—热挤压管坯—冷轧—拉拔”工艺（简称挤轧拉法），由于冷轧/拉拔道次多，加上扒皮、酸洗、退火等中间工序，总加工工序达20多个道次[见：郭莉，李耀群，冷凝管生产技术，p.30~32，冶金工业出版社，2007]，存在工艺流程长、能耗大、成材率低、成本高等问题。The second problem caused by increasing the iron content in white copper is that the solid solution strengthening and precipitation strengthening effects of the alloy are enhanced, the deformation resistance of the white copper pipe is significantly increased, the degree of work hardening is significantly increased, and the plasticity is reduced, which makes subsequent processing and forming difficult. low rate. At present, the main production method of iron and white copper pipes at home and abroad is the process of "semi-continuous casting solid ingot-hot extrusion tube billet-cold rolling-drawing" (referred to as extrusion-rolling method). , plus intermediate processes such as peeling, pickling, and annealing, the total processing process reaches more than 20 passes [see: Guo Li, Li Yaoqun, Condenser Tube Production Technology, p.30~32, Metallurgical Industry Press, 2007], there are Long technological process, high energy consumption, low yield, high cost and other issues.
本发明申请人等发明的热冷组合铸型水平连铸新技术[见：谢建新等，一种白铜管材热冷组合铸型水平连铸工艺与设备，中国发明专利，授权号ZL 201010501407.4，授权日2010-06-27]可制备较大直径（如直径Φ50mm以上）和壁厚（如5mm以上）的管材，管材内外表面光洁、具有高轴向取向柱状晶组织和优异的冷加工性能，无需铣面等处理可直接进行大变形量冷加工（如冷轧、拉拔）成形。在此基础上，提出了采用热冷组合铸型水平连铸技术制备白铜管坯，结合特定的后续加工与退火工艺，实现铁白铜管材短流程高效生产的方法[见：谢建新等，一种白铜合金管材短流程高效生产方法，中国发明专利，授权号ZL201110064777.0，授权日2012-10-10]，简称连铸冷加工法，具有工艺流程短、生产效率高、成材率高和能耗低等特点。将申请人的上述两个专利技术用于高铁白铜管材生产，可有效解决难加工和成材率低的问题，但不能解决由于铁含量提高导致明显的微观偏析现象，以及产品退火处理后析出相含量高等对管材耐腐蚀性能带来的不利影响，需要提出一种适合于高铁白铜的热处理制度。The new technology of hot-cold combined casting mold horizontal continuous casting invented by the applicants of the present invention [See: Xie Jianxin et al., A technology and equipment for hot-cold combined casting mold horizontal continuous casting of white copper pipe, Chinese invention patent, authorization number ZL 201010501407.4, authorized Day 2010-06-27] Can produce pipes with larger diameter (such as diameter Φ50mm or more) and wall thickness (such as 5mm or more), the inner and outer surfaces of the pipe are smooth, with high axial orientation columnar grain structure and excellent cold working performance, no need for milling Surface treatment can be directly formed by large deformation cold processing (such as cold rolling, drawing). On this basis, a method of preparing white copper tube blanks by using hot-cold combined mold horizontal continuous casting technology is proposed, combined with specific subsequent processing and annealing processes, to achieve short-process and efficient production of iron-nickel copper tubes [see: Xie Jianxin et al., a A short-process and high-efficiency production method of white copper alloy pipe, Chinese invention patent, authorization number ZL201110064777.0, authorization date 2012-10-10], referred to as the continuous casting cold processing method, has the advantages of short process flow, high production efficiency, high yield and energy consumption low-level features. Applying the above two patented technologies of the applicant to the production of high-iron white copper pipes can effectively solve the problems of difficult processing and low yield, but it cannot solve the obvious micro-segregation phenomenon caused by the increase of iron content and the content of precipitated phases after annealing treatment Due to the adverse effects of high grades on the corrosion resistance of pipes, it is necessary to propose a heat treatment system suitable for high-iron cupronickel.
发明内容Contents of the invention
本发明的目的在于提供一种新型高铁白铜合金BFe10-2-1，铁含量由BFe10-1-1的1.0~1.5 wt%提高为1.6~2.5wt%，镍和锰的含量与BFe10-1-1相同，可大幅度提高合金的力学性能和耐腐蚀性能；采用热冷组合铸型水平连铸制备高铁白铜管坯，以解决铁含量增加后铁白铜加工性能差、成材率低的问题；采用合适的冷加工（冷轧和/或冷拉）工艺和成品退火制度，控制再结晶组织和析出相含量，克服微观偏析以提高成分均匀性，使管材兼具良好的力学性能和耐腐蚀性能。提供一种高铁白铜合金及其高性能管材短流程生产方法，即开发一种高铁白铜合金BFe10-2-1，采用热冷组合铸型水平连铸工艺制备合金管坯，结合后续冷加工（冷轧和/或冷拉）和控制退火工艺，制备耐腐蚀性能和力学性能优异的高铁白铜合金管材。The object of the present invention is to provide a kind of novel high-iron cupronickel alloy BFe10-2-1, iron content is improved to 1.6～2.5wt% by 1.0～1.5wt% of BFe10-1-1, the content of nickel and manganese and BFe10-1- 1, the mechanical properties and corrosion resistance of the alloy can be greatly improved; the high-iron-nickel-nickel tube billet is prepared by horizontal continuous casting of hot-cold combined casting molds, so as to solve the problems of poor processability and low yield of iron-nickel-nickel copper after the iron content increases; Adopt appropriate cold working (cold rolling and/or cold drawing) process and finished annealing system to control recrystallization structure and precipitated phase content, overcome microscopic segregation to improve composition uniformity, so that the pipe has good mechanical properties and corrosion resistance. Provide a short-process production method of high-iron cupronickel alloy and its high-performance pipe, that is, develop a high-iron cupronickel alloy BFe10-2-1, adopt hot-cold combined casting mold horizontal continuous casting process to prepare alloy tube billet, combine subsequent cold processing (cold rolling and/or cold drawing) and controlled annealing process to prepare high-iron cupronickel alloy pipes with excellent corrosion resistance and mechanical properties.
一种高铁白铜合金管材，合金成分重量百分比为9~11wt%的电解镍、重量百分比1.6~2.5wt%的纯铁、重量百分比0.5~1.0wt%的纯锰和余量电解铜。A high-iron nickel-nickel alloy pipe material, the alloy components are 9-11wt% electrolytic nickel, 1.6-2.5wt% pure iron, 0.5-1.0wt% pure manganese and the balance electrolytic copper.
所述高铁白铜合金管材采用短流程生产方法制造，具体步骤如下：The high-iron nickel-copper alloy pipe is manufactured by a short-flow production method, and the specific steps are as follows:
（1）将电解镍、纯铁、纯锰和电解铜加入熔化炉中，加热至1200~1350℃进行熔化，熔化的金属液转入保温炉中，在保温炉温度为1200~1300℃的条件下静置0.5~1h，同时，保温炉内通惰性气体保护。(1) Add electrolytic nickel, pure iron, pure manganese and electrolytic copper into the melting furnace, heat to 1200~1350°C for melting, and transfer the molten metal into the holding furnace, under the condition that the holding furnace temperature is 1200~1300°C Stand still for 0.5~1h, at the same time, pass inert gas protection in the holding furnace.
（2）采用热冷组合铸型水平连铸工艺制备直径为Φ50~120mm，壁厚5~20mm(2) The diameter is Φ50~120mm and the wall thickness is 5~20mm, which is produced by the horizontal continuous casting process of hot and cold combined casting mold.
的高表面质量、高轴向取向柱状晶组织、冷加工性能优良的高铁白铜管坯。High-iron white copper tube billet with high surface quality, high axial orientation columnar grain structure, and excellent cold workability.
（3）将管坯直接进行冷轧，总变形量70%~95%，生产直径Φ30~100mm、壁厚(3) The tube billet is directly cold-rolled, the total deformation is 70%~95%, the production diameter is Φ30~100mm, and the wall thickness is
1~15mm的各种规格的高铁白铜管材；冷轧管材根据需要可进行低温回复退火，温度300~500℃，退火时间1~2h，然后进行串连拉或三联拉、一次或多次盘拉，生产径Φ30mm以下、壁厚2mm以下的小规格高铁白铜管材，平均道次延伸系数1.1~1.5，盘拉速度1~1000m/min。1~15mm high-iron white copper pipes of various specifications; cold-rolled pipes can be subjected to low temperature recovery annealing according to needs, the temperature is 300~500°C, the annealing time is 1~2h, and then series drawing or triple drawing, one or more coil drawing , the production of small-sized high-speed iron white copper pipes with a diameter below Φ30mm and a wall thickness below 2mm, the average pass elongation coefficient is 1.1~1.5, and the coil pulling speed is 1~1000m/min.
（4）将步骤（3）中生产的管材进行成品退火，主要是消除变形组织和微观偏(4) Anneal the finished pipes produced in step (3), mainly to eliminate deformed structures and microscopic deviations.
析，将再结晶晶粒平均尺寸控制为20~40μm，析出相体积分数降低至2%以下，获得所需要的性能，并使产品具有光亮的表面状态，满足实际使用要求。合适的退火温度为700~850℃，退火时间为1~2h，退火保护气氛2%H2+余量N2。Analysis, the average size of recrystallized grains is controlled to 20~40μm, the volume fraction of precipitated phase is reduced to less than 2%, the required performance is obtained, and the product has a bright surface state, which meets the actual use requirements. The suitable annealing temperature is 700~850℃, the annealing time is 1~2h, and the annealing protective atmosphere is 2%H2 + balance N2 .
其中热冷组合铸型水平连铸工艺步骤（2）中的热型（铸型加热段）温度为1180-1350℃，冷型（水冷铜套）冷却水流量为500-1000L/h，牵引速度为100-200mm/min。Among them, in step (2) of the hot-cold combined mold horizontal continuous casting process, the temperature of the hot mold (mold heating section) is 1180-1350°C, the cooling water flow rate of the cold mold (water-cooled copper sleeve) is 500-1000L/h, and the traction speed 100-200mm/min.
本发明的优点在于：The advantages of the present invention are:
（1）开发的BFe10-2-1合金(铁含量为1.6~2.5wt%)，与BFe10-1-1合金相比，合金成本基本相同，而力学性能和耐腐蚀性能（尤其是耐海水冲刷腐蚀）显著提高。(1) The developed BFe10-2-1 alloy (iron content is 1.6~2.5wt%), compared with the BFe10-1-1 alloy, the cost of the alloy is basically the same, while the mechanical properties and corrosion resistance (especially resistance to seawater erosion Corrosion) was significantly improved.
（2）采用热冷组合铸型水平连铸工艺制备内外表面质量好、组织致密、具有高轴向取向柱状晶组织的高铁白铜管坯，大幅度提高了冷加工性能，解决了高铁BFe10-2-1白铜合金管材加工性能差、成材率低的问题。该工艺制备的白铜管坯可直接进行大变形量冷加工成形（冷轧、拉拔），显著缩短了工艺流程，降低了能耗，提高了成材率和生产效率。(2) The high-iron white copper tube blank with good internal and external surface quality, compact structure, and high axial orientation columnar grain structure was prepared by using the hot-cold combined mold horizontal continuous casting process, which greatly improved the cold working performance and solved the problem of high-iron BFe10-2 -1 The problem of poor processing performance and low yield of white copper alloy pipes. The white copper tube blank prepared by this process can be directly subjected to large deformation cold forming (cold rolling, drawing), which significantly shortens the process flow, reduces energy consumption, and improves the yield and production efficiency.
（3）通过控制成品退火工艺，消除合金管材的变形组织和微观偏析，控制再结晶组织和析出相含量，提高成分均匀性，获得综合使用性能优异的BFe10-2-1白铜管材。与普通BFe10-1-1管材相比，本发明制备的BFe10-2-1白铜管材抗海水冲刷腐蚀性能提高30~40%，抗拉强度提高10~20%，断后伸长率和热导率基本相同。(3) By controlling the finished annealing process, eliminating the deformation structure and micro-segregation of the alloy pipe, controlling the recrystallization structure and precipitated phase content, improving the composition uniformity, and obtaining BFe10-2-1 white copper pipe with excellent comprehensive performance. Compared with ordinary BFe10-1-1 pipes, the BFe10-2-1 white copper pipes prepared by the present invention have improved seawater erosion corrosion resistance by 30-40%, tensile strength by 10-20%, and elongation and thermal conductivity after fracture. basically the same.
具体实施方式detailed description
实施例1：尺寸为Φ60×3mm BFe10-2-1白铜合金直管生产方法Embodiment 1: The size is Φ60×3mm BFe10-2-1 white copper alloy straight tube production method
（1）将重量百分比为10.0wt%的电解镍、重量百分比2.0wt%的纯铁、质量百(1) Electrolytic nickel with a weight percentage of 10.0wt%, pure iron with a weight percentage of 2.0wt%, and 100% by weight
分比为1.0wt%的纯锰和余量电解铜加入熔化炉中，加热至1250℃进行熔化，熔化的金属液转入保温炉中，在保温炉温度为1200℃的条件下静置0.5h，同时保温炉内通惰性气体保护。Add pure manganese with a ratio of 1.0wt% and the balance of electrolytic copper into the melting furnace, heat to 1250°C for melting, transfer the molten metal into the holding furnace, and let it stand for 0.5h at the temperature of the holding furnace at 1200°C , At the same time, the inert gas protection is passed through the holding furnace.
（2）采用热冷组合铸型水平连铸工艺制备直径为Φ85×10mm的高铁白铜管坯，(2) A high-iron white copper tube billet with a diameter of Φ85×10mm was prepared by the horizontal continuous casting process of the hot-cold combined mold,
热型（铸型加热段）温度为1220℃，冷型（水冷铜套）冷却水流量为900L/h，牵引速度为120mm/min。The temperature of the hot type (mold heating section) is 1220°C, the cooling water flow rate of the cold type (water-cooled copper sleeve) is 900L/h, and the pulling speed is 120mm/min.
（3）将步骤（2）制备的管坯进行3道次的三辊周期式冷轧，获得Φ60×3mm(3) The tube blank prepared in step (2) is subjected to three-pass three-roller periodic cold rolling to obtain Φ60×3mm
合金管材，平均道次变形量为40%，各道次变形量随变形道次增加逐渐减小，轧制过程可不进行中间退火。For alloy pipes, the average deformation of each pass is 40%, and the deformation of each pass gradually decreases with the increase of deformation passes, and intermediate annealing is not required during the rolling process.
（4）将步骤（3）中轧后管材进行成品退火，退火温度800℃，退火时间为1.5h，(4) Anneal the finished pipe after rolling in step (3). The annealing temperature is 800°C and the annealing time is 1.5h.
退火保护气氛2%H2+余量N2，目的是消除管材变形组织和微观偏析，退火后管材的再结晶晶粒平均尺寸为35μm左右，析出相体积分数为1.5%左右，管材性能如表1所示。表中（包括表2和表3）热导率是根据合金所测的电导率和Wiedeman-Franz定律计算得出的。与普通BFe10-1-1管材相比，所制备的BFe10-2-1高铁白铜管材抗海水冲刷腐蚀性能提高30%，抗拉强度提高19%，断后伸长率和热导率基本相同。The annealing protective atmosphere is 2% H2 + the balance of N2 , the purpose is to eliminate the deformed structure and microscopic segregation of the pipe. After annealing, the average size of the recrystallized grain of the pipe is about 35 μm, and the volume fraction of the precipitated phase is about 1.5%. The performance of the pipe is shown in the table 1. The thermal conductivity in the table (including Table 2 and Table 3) is calculated based on the measured electrical conductivity of the alloy and the Wiedeman-Franz law. Compared with ordinary BFe10-1-1 pipes, the prepared BFe10-2-1 high-iron-nickel-nickel pipes have improved seawater erosion corrosion resistance by 30%, tensile strength increased by 19%, and elongation after fracture and thermal conductivity are basically the same.
表1 BFe10-2-1和BFe10-1-1合金管材性能比较Table 1 Comparison of properties of BFe10-2-1 and BFe10-1-1 alloy pipes
实施例2：尺寸为Φ40×2mm BFe10-2-1白铜直管生产方法Example 2: The production method of BFe10-2-1 white copper straight tube with a size of Φ40×2mm
（1）将重量百分比为10.0wt%的电解镍、重量百分比1.8wt%的纯铁、质量百(1) Electrolytic nickel with a weight percentage of 10.0wt%, pure iron with a weight percentage of 1.8wt%, and 100% by weight
分比为1.0wt%的纯锰和余量电解铜加入熔化炉中，加热至1250℃进行熔化，熔化的金属液转入保温炉中，在保温炉温度为1200℃的条件下静置0.5h，同时保温炉内通惰性气体保护。Add pure manganese with a ratio of 1.0wt% and the balance of electrolytic copper into the melting furnace, heat to 1250°C for melting, transfer the molten metal into the holding furnace, and let it stand for 0.5h at the temperature of the holding furnace at 1200°C , At the same time, the inert gas protection is passed through the holding furnace.
（2）采用热冷组合铸型水平连铸工艺制备直径为Φ70×8mm的高铁白铜管坯，(2) A high-iron white copper tube billet with a diameter of Φ70×8mm was prepared by using a hot-cold combined mold horizontal continuous casting process,
热型（铸型加热段）温度为1200℃，冷型（水冷铜套）冷却水流量为700L/h，牵引速度为150mm/min。The temperature of the hot mold (casting mold heating section) is 1200°C, the cooling water flow rate of the cold mold (water-cooled copper sleeve) is 700L/h, and the pulling speed is 150mm/min.
（3）将步骤（2）制备的管坯进行4道次三辊周期式冷轧，获得Φ40×2mm合(3) The tube blank prepared in step (2) is subjected to 4-pass three-roll periodic cold rolling to obtain a Φ40×2mm composite
金管材，平均道次变形量40%，各道次变形量随变形道次增加逐渐减小，轧制过程可不进行中间退火。For gold pipes, the average deformation of each pass is 40%, and the deformation of each pass gradually decreases with the increase of deformation passes, and intermediate annealing is not required during the rolling process.
（4）将步骤（3）中轧后管材进行成品退火，退火温度800℃，退火时间为1h，(4) Anneal the finished pipe after rolling in step (3), the annealing temperature is 800°C, and the annealing time is 1h,
退火保护气氛2%H2+余量N2，目的是消除管材的变形组织和微观偏析，退火后管材的再结晶晶粒平均尺寸为30μm左右，析出相体积分数为1.0%左右，管材性能如表2所示。与普通BFe10-1-1管材相比，所制备的BFe10-2-1高铁白铜管材抗海水冲刷腐蚀性能提高35%，抗拉强度提高15%，断后伸长率和热导率基本相同。The annealing protection atmosphere is 2% H2 + the balance of N2 , the purpose is to eliminate the deformation structure and microscopic segregation of the pipe. After annealing, the average size of the recrystallized grain of the pipe is about 30 μm, and the volume fraction of the precipitated phase is about 1.0%. The performance of the pipe is as follows: Table 2 shows. Compared with ordinary BFe10-1-1 pipes, the prepared BFe10-2-1 high-iron-nickel-nickel pipes have improved seawater erosion corrosion resistance by 35%, tensile strength increased by 15%, and elongation after fracture and thermal conductivity are basically the same.
表2 BFe10-2-1和BFe10-1-1白铜管材性能比较Table 2 Performance comparison of BFe10-2-1 and BFe10-1-1 white copper pipes
实施例3：尺寸为Φ15×1mm BFe10-2-1白铜盘管生产方法Embodiment 3: The production method of BFe10-2-1 white copper coil with a size of Φ15×1mm
（1）将重量百分比为10.0wt%的电解镍、重量百分比1.8wt%的纯铁、质量百(1) Electrolytic nickel with a weight percentage of 10.0wt%, pure iron with a weight percentage of 1.8wt%, and 100% by weight
分比为1.0wt%的纯锰和余量电解铜加入熔化炉中，加热至1250℃进行熔化，熔化的金属液转入保温炉中，在保温炉温度为1200℃的条件下静置时间0.5h，同时保温炉内通惰性气体保护。Pure manganese with a ratio of 1.0wt% and the balance of electrolytic copper are added to the melting furnace, heated to 1250°C for melting, and the molten metal is transferred into the holding furnace, and the standing time is 0.5 under the temperature of the holding furnace at 1200°C. h, while inert gas protection is passed through the holding furnace.
（2）采用热冷组合铸型水平连铸工艺制备直径为Φ50×5mm的白铜合金管坯，(2) A hot-cold combined mold horizontal continuous casting process is used to prepare a cupronickel alloy tube billet with a diameter of Φ50×5mm.
热型（铸型加热段）温度为1200℃，冷型（水冷铜套）冷却水流量为600L/h，牵引速度为150mm/min。The temperature of the hot mold (mold heating section) is 1200°C, the cooling water flow rate of the cold mold (water-cooled copper sleeve) is 600L/h, and the pulling speed is 150mm/min.
（3）将步骤（2）制备管坯进行大变形两辊周期式冷轧，变形量为70~80%。(3) The tube billet prepared in step (2) is subjected to large-deformation two-roller periodic cold rolling, and the deformation amount is 70-80%.
（4）将步骤（3）中的冷轧管材进行低温回复退火，退火温度为400℃，退(4) The cold-rolled pipe in step (3) is subjected to low-temperature recovery annealing, the annealing temperature is 400°C, and the annealing
火时间为1h，退火保护气氛2%H2+余量N2。The fire time is 1h, and the annealing protective atmosphere is 2%H2 + balance N2 .
（5）将步骤（4）中退火后的管材进行1~3道次的串连拉或三联拉，变形量(5) The pipe annealed in step (4) is subjected to 1 to 3 passes of series drawing or triple drawing, and the amount of deformation
15~25%，目的是将管材进行盘拉前的精整。15~25%, the purpose is to finish the pipe before coiling.
（6）将步骤（5）中精整后的管材进行盘拉，获得Φ15×1mm合金管材，平均(6) Pull the finished pipe in step (5) to obtain a Φ15×1mm alloy pipe, with an average
道次延伸系数1.2，盘拉速度500 m/min。The pass extension coefficient is 1.2, and the coil pulling speed is 500 m/min.
（7）将步骤（6）中盘拉管材进行成品退火，退火温度780℃，退火时间为1h，(7) Perform finished annealing on the coiled pipe in step (6), the annealing temperature is 780°C, and the annealing time is 1h.
退火保护气氛2%H2+余量N2，目的是消除管材的变形组织和微观偏析，退火后管材的再结晶晶粒平均尺寸为30μm左右，析出相体积分数为1.2%左右，管材性能如表3所示。与普通BFe10-1-1管材相比，所制备的BFe10-2-1白铜合金管材抗海水冲刷腐蚀性能提高32%，抗拉强度提高16%，断后伸长率和热导率基本相同。The annealing protection atmosphere is 2% H2 + the balance of N2 , the purpose is to eliminate the deformation structure and microscopic segregation of the pipe. After annealing, the average size of the recrystallized grain of the pipe is about 30 μm, and the volume fraction of the precipitated phase is about 1.2%. The performance of the pipe is as follows: Table 3 shows. Compared with ordinary BFe10-1-1 pipes, the prepared BFe10-2-1 cupronickel alloy pipes have improved seawater erosion corrosion resistance by 32%, tensile strength by 16%, and elongation after fracture and thermal conductivity are basically the same.
表3 BFe10-2-1和BFe10-1-1合金管材性能对比Table 3 Performance comparison of BFe10-2-1 and BFe10-1-1 alloy pipes
| Application Number | Priority Date | Filing Date | Title |
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| CN201410653407.4ACN104451251B (en) | 2014-11-18 | 2014-11-18 | A kind of high ferro White brass alloy tubing and short-flow production method thereof |
| Application Number | Priority Date | Filing Date | Title |
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| CN201410653407.4ACN104451251B (en) | 2014-11-18 | 2014-11-18 | A kind of high ferro White brass alloy tubing and short-flow production method thereof |
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| CN104451251A CN104451251A (en) | 2015-03-25 |
| CN104451251Btrue CN104451251B (en) | 2016-08-17 |
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| CN201410653407.4AActiveCN104451251B (en) | 2014-11-18 | 2014-11-18 | A kind of high ferro White brass alloy tubing and short-flow production method thereof |
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| CN101028644A (en)* | 2007-04-10 | 2007-09-05 | 中铝洛阳铜业有限公司 | Short flow-path production of copper and copper alloy precisive pipe |
| CN101070931A (en)* | 2007-04-23 | 2007-11-14 | 中铝洛阳铜业有限公司 | Method for preparing large-diameter white copper pipe |
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| CN101966564A (en)* | 2010-10-09 | 2011-02-09 | 北京科技大学 | Hot-cold combined casting mould horizontal continuous casting equipment of cupronickel tubing and technology thereof |
| CN102154599A (en)* | 2011-03-17 | 2011-08-17 | 北京科技大学 | Short-flow high-efficiency production method for white brass alloy pipes |
| CN102732746A (en)* | 2012-07-18 | 2012-10-17 | 宁波兴业盛泰集团有限公司 | Novel erosion resistant cupronickel alloy and preparation method thereof |
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