CN109604333B - 一种tc4棒材的处理方法 - Google Patents

一种tc4棒材的处理方法 Download PDF

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CN109604333B
CN109604333B CN201811493449.0A CN201811493449A CN109604333B CN 109604333 B CN109604333 B CN 109604333B CN 201811493449 A CN201811493449 A CN 201811493449A CN 109604333 B CN109604333 B CN 109604333B
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方强
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Panzhihua Iron and Steel Group Panzhihua iron and Steel Research Institute Co., Ltd.
Chengdu Advanced Metal Materials Industry Technology Research Institute Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B3/00Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/46Roll speed or drive motor control
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74Temperature control, e.g. by cooling or heating the rolls or the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203Cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203Cooling
    • B21B45/0206Coolants

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

本发明公开了一种TC4棒材的处理方法,包括依次对棒坯进行的加热、粗轧、中轧、精轧和减定径轧制步骤,中轧、精轧和减定径轧制步骤之后都进行冷处理。本发明通过将冷处理步骤加入到TC4棒材的加工工艺中,对TC4钛合金的锻造方坯依次进行加热、粗轧、中轧、精轧和减定径轧制步骤,并在中轧、精轧和减定径轧制步骤之后都进行冷处理,可有效提高TC4钛合金的组织均匀性,材料内部晶粒发生转动,有择优取向现象发生,同时由于深冷的冷压缩作用,晶界出现更多的析出物,使得制得的TC4棒材力学性能提升1~8%。

Description

一种TC4棒材的处理方法
技术领域
本发明涉及钛合金处理工艺技术领域,尤其是一种TC4棒材的处理方法。
背景技术
冷处理指温度在-10℃以下的处理,是改善材料组织性能的一种工艺,被广泛应用于工模具钢、高速钢、硬质合金以及复合材料,但关于有色合金特别是TC4钛合金的深冷处理,国内外研究结果甚少。TC4钛合金因具有耐蚀性好、耐热性高,比刚度、比强度高等优点,商业应用前景相当广阔。目前还没有将冷处理工艺应用于钛及TC4钛合金处理的详细工艺。
发明内容
本发明所要解决的技术问题是:提供一种TC4棒材的处理方法,将冷处理工艺加入到TC4棒材的制备工艺中。
为解决上述技术问题本发明所采用的技术方案是:一种TC4棒材的处理方法,包括依次对棒坯进行的加热、粗轧、中轧、精轧和减定径轧制步骤,中轧、精轧和减定径轧制步骤之后都进行冷处理。
进一步的是:所述加热步骤中,将棒材原材的锻造方坯加热保温1~3.5h,加热温度为 900~950℃。
进一步的是:所述粗轧步骤中,轧制速度为0.1~0.8m/s,轧制6道次,道次延伸系数为1.2~1.5,轧件的终轧温度为800~950℃。
进一步的是:所述中轧步骤中,将粗轧后的轧件切头5~10mm后再进行轧制,轧制速度为0.2~1.5m/s,轧制6道次,道次延伸系数为1.1~1.4,轧件的终轧温度为750~850℃。
进一步的是:所述精轧步骤中,将中轧后的轧件切头5~10mm后再进行轧制,轧制速度为1.0~5.0m/s,轧制6道次,道次延伸系数为1.1~1.3,轧件的终轧温度为750~950℃。
进一步的是:所述减定径轧制步骤中,将精轧后的轧件切头5~10mm后再进行轧制,轧制速度为4.5~15.0m/s,轧制2~6道次,道次延伸系数为1.1~1.3,轧件的终轧温度为750~ 950℃。
进一步的是:所述冷处理采用介质为NaCl、MgCl2、KCl、Na2SO4、MgSO4、K2SO4和水的混合液,冷处理温度为-40~-10℃。
进一步的是:所述棒坯为TC4钛合金的锻造方坯。
本发明的有益效果是:本发明通过将冷处理步骤加入到TC4棒材的加工工艺中,对TC4钛合金的锻造方坯依次进行加热、粗轧、中轧、精轧和减定径轧制步骤,并在中轧、精轧和减定径轧制步骤之后都进行冷处理,可有效提高TC4钛合金的组织均匀性,材料内部晶粒发生转动,有择优取向现象发生,同时由于深冷的冷压缩作用,晶界出现更多的析出物,使得制得的TC4棒材力学性能提升1~8%。
具体实施方式
为了便于理解本发明,下面结合实施例对本发明进行进一步的说明。
本发明所述的一种TC4棒材的处理方法,依次进行以下步骤:
加热:将棒材原材的锻造方坯加热保温1~3.5h,加热温度为900~950℃;
粗轧:轧制速度为0.1~0.8m/s,轧制6道次,道次延伸系数为1.2~1.5,轧件的终轧温度为800~950℃;
中轧:将粗轧后的轧件切头5~10mm后再进行轧制,轧制速度为0.2~1.5m/s,轧制6 道次,道次延伸系数为1.1~1.4,轧件的终轧温度为750~850℃;
精轧:将中轧后的轧件切头5~10mm后再进行轧制,轧制速度为1.0~5.0m/s,轧制6 道次,道次延伸系数为1.1~1.3,轧件的终轧温度为750~950℃;
减定径轧制:将精轧后的轧件切头5~10mm后再进行轧制,轧制速度为4.5~15.0m/s,轧制2~6道次,道次延伸系数为1.1~1.3,轧件的终轧温度为750~950℃;
本发明的工序中,在中轧、精轧和减定径轧制步骤之后都进行冷处理,冷处理采用介质为NaCl、MgCl2、KCl、Na2SO4、MgSO4、K2SO4和水的混合液,冷处理温度为-40~-10℃。
实施例1
将TC4钛合金的锻造方坯在900℃的温度下加热保温1h,对加热后的锻造方坯进行粗轧,轧制速度为0.2m/s,轧制6道次,道次延伸系数依次为1.2、1.4、1.4、1.3、1.3、1.3,轧件的终轧温度为950℃;将粗轧后的轧件切头6mm后进行中轧,轧制速度为1.2m/s,轧制6 道次,道次延伸系数依次为1.1、1.3、1.3、1.3、1.3、1.2,中轧后进行冷处理,轧件的终轧温度为850℃;将中轧后的轧件切头6mm后进行精轧,轧制速度为2.5m/s,轧制6道次,道次延伸系数依次为1.1、1.3、1.3、1.3、1.3、1.2,精轧后进行冷处理,轧件的终轧温度为800℃;将精轧后的轧件切头6mm后再进行轧制,轧制速度为10.0m/s,轧制4道次,道次延伸系数依次为1.1、1.3、1.2、1.1轧件的终轧温度为750℃;本实施例中所采用冷处理介质中各成分浓度:NaCl为20mol/L、MgCl2为10mol/L、KCl为20mol/L、Na2SO4为5mol/L、MgSO4为1mol/L、K2SO4为1mol/L。
实施例2
将TC4钛合金的锻造方坯在950℃的温度下加热保温2h,对加热后的锻造方坯进行粗轧,轧制速度为0.5m/s,轧制6道次,道次延伸系数依次为1.2、1.4、1.4、1.3、1.3、1.3,轧件的终轧温度为900℃;将粗轧后的轧件切头6mm后进行中轧,轧制速度为1.2m/s,轧制6 道次,道次延伸系数依次为1.1、1.3、1.3、1.3、1.3、1.2,中轧后进行冷处理,轧件的终轧温度为850℃;将中轧后的轧件切头6mm后进行精轧,轧制速度为2.5m/s,轧制6道次,道次延伸系数依次为1.1、1.3、1.3、1.3、1.3、1.2,精轧后进行冷处理,轧件的终轧温度为800℃;将精轧后的轧件切头6mm后再进行轧制,轧制速度为10.0m/s,轧制4道次,道次延伸系数依次为1.1、1.3、1.2、1.1轧件的终轧温度为750℃;本实施例中所采用冷处理介质中各成分浓度为:NaCl为20mol/L、MgCl2为10mol/L、KCl为20mol/L、Na2SO4为5mol/L、 MgSO4为1mol/L、K2SO4为1mol/L。

Claims (1)

1.一种TC4棒材的处理方法,其特征在于:包括对TC4钛合金锻造方坯依次进行的加热、粗轧、中轧、精轧和减定径轧制步骤,中轧、精轧和减定径轧制步骤之后都进行冷处理;所述冷处理采用介质为NaCl、MgCl2、KCl、Na2SO4、MgSO4、K2SO4和水的混合液,冷处理温度为-40~-10℃;加热步骤中,将TC4钛合金锻造方坯加热保温1~3.5h,加热温度为900~950℃;粗轧步骤中,轧制速度为0.1~0.8m/s,轧制6道次,道次延伸系数为1.2~1.5,轧件的终轧温度为800~950℃;中轧步骤中,将粗轧后的轧件切头5~10mm后再进行轧制,轧制速度为0.2~1.5m/s,轧制6道次,道次延伸系数为1.1~1.4,轧件的终轧温度为750~850℃;精轧步骤中,将中轧后的轧件切头5~10mm后再进行轧制,轧制速度为1.0~5.0m/s,轧制6道次,道次延伸系数为1.1~1.3,轧件的终轧温度为750~950℃;减定径轧制步骤中,将精轧后的轧件切头5~10mm后再进行轧制,轧制速度为4.5~15.0m/s,轧制2~6道次,道次延伸系数为1.1~1.3,轧件的终轧温度为750~950℃。
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