CN110802112B - 一种铝合金板材龙行轧制工艺 - Google Patents
一种铝合金板材龙行轧制工艺 Download PDFInfo
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- CN110802112B CN110802112B CN201911169044.6A CN201911169044A CN110802112B CN 110802112 B CN110802112 B CN 110802112B CN 201911169044 A CN201911169044 A CN 201911169044A CN 110802112 B CN110802112 B CN 110802112B
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- 238000005096 rolling process Methods 0.000 title claims abstract description 42
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 7
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims abstract description 5
- 238000005097 cold rolling Methods 0.000 claims description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910018569 Al—Zn—Mg—Cu Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-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
- B21B1/22—Metal-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 plates, strips, bands or sheets of indefinite length
- B21B1/30—Metal-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 plates, strips, bands or sheets of indefinite length in a non-continuous process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling 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
- B21B2003/001—Aluminium or its alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
- B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
- B21B2013/021—Twin mills
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
Description
技术领域
本发明涉及金属材料加工领域,特别是一种铝合金板材龙行轧制工艺。
背景技术
高性能铝合金(如Al-Zn-Mg-Cu系)中厚板以其优异的比强度、耐蚀性、韧性及抗疲劳性能而广泛用于机身框架、隔框等的制造,成为至关重要的航空结构材料。传统热轧工艺是目前制备此类高强韧铝合金中厚板的主要加工手段,但利用该工艺生产中厚板过程中普遍存在沿板厚方向变形不均匀的问题,并最终导致板材厚度方向组织与力学性能不均匀,严重影响和限制此类合金板材的寿命和广泛应用。
异步轧制作为一种先进的强塑性变形工艺,可通过对同步轧机的改造来实现,其主要轧制方式有同径异速异步轧制(上、下辊辊径相同,转速不同)和异径同速异步轧制(上、下辊辊径不同,转速相同)。异步轧制过程中,由于上、下轧辊对轧件变形的不对称性导致轧件内部产生剧烈的附加剪切变形,从而改善轧材沿厚度方向变形的均匀性,有助于板材综合性能的提高。但是,现有的异步轧制在轧制过程中存在板材翘曲或下榻的现象,板材的平直度不好,特别是在冷轧100~150mm高性能铝合金时更明显。
发明内容
本发明的目的是克服现有技术的不足,而提供一种铝合金板材龙行轧制工艺,解决轧制时板材平直度不好的问题。
本发明的技术方案是:一种适合铝合金板材龙行轧制工艺,其包括步骤如下:
⑴、设置轧制参数:最大轧制力1200吨,最大扭矩400kNm,最大下压量20 mm,上辊轧制速度1.5~3.5m/s,上、下辊直径为100 mm,异速比i为1.2;
⑵、错位量S的设置,按如下非线性回归方程设置错位量S
式中:S-错位量,mm
h-轧板入口厚度,mm
Δh -下压量,mm
i -异速比,上辊速度与下辊速度之比,1< i≤1.2
其中:Δh设置为h的10%
⑶、检验龙行轧制后铝板的平直度。
本发明与现有技术相比具有如下特点:
1、采用龙行轧制能实现铝合金板材的表面物理机械性能与芯部相关不超过10%。同时解决轧制过程中板形良好的平直度。
2、按本发明的非线性回归方程设置错位量S,解决了轧制过程中板形的平直度问题。
以下结合附图和具体实施方式对本发明的详细结构作进一步描述。
附图说明
图1为本发明中的龙形轧机示意图。
具体实施方式
实施例1
如图1所示,一种龙形轧机轧制,指的是上、下辊辊径相同,其转速不同,同时上、下辊轴线不在同一垂直面内,而是将线速度较小的上辊向轧制出口方向V偏移一定距离,即错位量S,即同径非对称异速轧制。这样轧件在变形区能形成前滑区、搓轧区、后滑区。在“搓轧”区内,轧件在承受竖直方向压缩力的同时,还要承受水平方向的剪切应力,使轧件产生压缩的同时产生剪切应变。剪切应变会产生剪切变形,有利于轧件的晶粒细化,提高轧件组织均匀性和力学与物理性能,特别是铝合金材料,相对现有的异步对称轧制,能使铝合金板材的表面物理机械性能与芯部相关不超过10%,采用龙形轧机轧制的铝合金板材广泛用于航空、航天和轨道交通技术等领域。
本发明提供一种适合冷轧100~150mm铝合金板材龙行轧制工艺,包括步骤如下
1、设置轧制参数:最大轧制力1200吨,最大扭矩400kNm,最大下压量20 mm,上辊轧制速度1.5~3.5m/s,上、下辊直径为100 mm,异速比i为1.2;
2、错位量S的设置,按如下非线性回归方程设置错位量S
式中:S-错位量,mm
h-轧板入口厚度,mm
Δh -下压量,mm
i -异速比,上辊速度与下辊速度之比,1< i≤1.2
其中:Δh设置为h的10%
如例1:h为120 mm,Δh=120*10%=12 mm,i=1.2
则:S=15 mm
如例2:h为100 mm,Δh=100*10%=10 mm,i=1.2
则:S=25 mm
3、检验龙行轧制后铝板的平直度。
通过龙行轧制高性能铝合金的特点,设置合适的参数,特别是按照非线性回归方程设置错位量S,实现铝合金板材的表面物理机械性能与芯部相关不超过10%,同时解决轧制过程中板形良好的平直度。
上述实施例为本发明较佳的实现方案,除此之外,本发明还可以以其它方式实现,在不脱离本技术方案构思的前提下任何显而易见的替换均在本发明的保护范围之内。
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