CN110295321A - 一种复合制动鼓用钢带及其生产方法 - Google Patents
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- 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
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices 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
- B21B45/0203—Cooling
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- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
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- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
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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
- B21B2001/225—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 by hot-rolling
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Abstract
本发明提供了一种复合制动鼓用高塑性钢带,其质量百分配比为:C:0.05~0.08%,Si:≤0.10%,Mn:0.09~1.20%,P:≤0.012%,S≤0.006%,Al:0.020~0.060%,其余为Fe和不可避免杂质。本发明还提供了一种复合制动鼓用高塑性钢带的生产方法,包括板坯加热、粗轧、精轧、层流冷却。本发明生产的钢带屈服强度310~350MPa,抗拉强度400~440MPa,伸长率≥32%,韧脆转变点低于‑40℃,具有低碳、高塑性,利于旋压变形,可以避免复合制动鼓制造过程的开裂。且生产成本低廉、专用性强的钢材,有利于复合制动鼓制造行业大量的推广应用。
Description
技术领域
本发明属于钢铁材料技术领域,具体涉及一种复合制动鼓用钢带及其生产方法。
背景技术
制动鼓是重卡制动体系的一个重要零部件,制动鼓受到制动片的正压力和摩擦阻力,因此制动鼓材料需具有一定的强度、刚度和热容量。市场上制动鼓多为灰铁铸造,铸铁制动鼓散热好但容易发生崩裂,并且重量大,为解决铸铁制动鼓的缺陷,市场上出现了一种新型复合制动鼓,采用钢材进行旋压成型,然后通过离心浇铸方式生产钢-铁复合制动鼓,由于该项复合制动鼓制造工艺涉及大变形量的减薄旋压,在钢材的使用加工过程中常常出现开裂,给复合制动鼓生产企业造成不必要的经济损失。
本发明生产的钢具有低碳、高塑性,有利于旋压成型,并且可以保证离心浇铸后复合制动鼓的均匀壁厚。采用本发明生产的高塑性钢带解决了复合制动鼓旋压成型过程中的开裂问题,提高了车辆行驶安全性,更实现了制动系统的减重,推进了专用车轻量化进程。
发明内容
综上所述,为了解决现有的技术问题,本发明采用的技术方案为:
一种复合制动鼓用钢带,其质量百分百比为:C:0.05~0.08%,Si:≤0.10%,Mn:0.09~1.20%,P:≤0.012%,S≤0.006%,Al:0.020~0.060%,其余为Fe和不可避免杂质。
一种复合制动鼓用钢带的生产方法,步骤如下;
(1)板坯加热:加热炉炉温1200~1280℃,加热时长为150~200min,板坯连铸下线时间不低于48小时。
所述板坯的化学成分质量百分百比为:C:0.05~0.08%,Si:≤0.10%,Mn:0.09~1.20%,P:≤0.012%,S≤0.006%,Al:0.020~0.060%,其余为Fe和不可避免杂质。
(2)轧制:粗轧过程粗除鳞保证至少两道次;中间坯温度为990~1020℃,得到中间坯厚度为45~50mm;精轧开轧温度≤980℃,精轧终轧温度860~880℃,轧制凸度目标≤1;
(3)层流冷却:轧制后进行层流冷却,卷取温度620~640℃,卷取设置热尾,热尾温度640~660℃,热尾长度15~30m。
一种复合制动鼓用钢带在复合制动鼓上的应用。
有益效果:
1、本发明的制备方法制造的钢带,屈服强度310~350MPa,抗拉强度400~440MPa,伸长率≥32%,韧脆转变点低于-40℃,具有低碳、高塑性,利于制动鼓旋压变形,解决复合制动鼓制造过程的开裂问题。
2、本发明采用低碳设计改善钢材焊接性能、韧塑性能;凸度设置严格控制钢带厚度精度,增加制动鼓旋压稳定性减少开裂;层流冷却增加热尾设置,改善钢带通卷性能,同时释放内应力。
3、本发明的技术方案可得到厚度精度高、通卷性能好的钢带,同时可以保障钢带内部显微组织的均匀、细小。
4.本发明的技术方案为复合制动鼓制造行业提供了一种专业性强的品种钢材,生产成本低廉,有利于制造行业大量的推广应用。
具体实施方式
下面将结合本发明具体实施例,对本发明做出进一步地描述:
实施例1
本实施例采用本公司1780生产线生产产品厚度规格为16mm、抗拉强度400MPa复合制动鼓用钢带过程为例,对本发明作进一步的说明。本实施例的复合制动鼓用高塑性钢带按以下重量百分比配比:C:0.06%,Si:0.03%,Mn:1.00%,P:0.010%,S:0.003%, Al:0.036%,余量为Fe和不可避免杂质。
本实施例的复合制动鼓用高塑性钢带生产方法包括:板坯加热、粗轧、精轧、层流冷却。
板坯加热:加热炉炉温1200~1280℃,加热时长为160min,板坯连铸下线时间不低于48小时。
所述板坯的化学成分质量百分百比为:C:0.06%,Si:0.03%,Mn:1.00%,P:0.010%,S:0.003%, Al:0.036%,余量为Fe和不可避免杂质。
轧制:粗轧过程粗除鳞保证2道次;中间坯温度为1010℃,得到中间坯厚度为48mm;精轧开轧温度980℃,精轧终轧温度870℃,轧制凸度目标≤1;
层流冷却:轧制后进行层流冷却,卷取温度620℃,卷取设置热尾,热尾温度640℃,热尾长度15m。
按照本实施例的步骤生产的钢带,其性能指标见表1。
表1 实施例1生产的16mm复合制动鼓用高塑性钢带性能
由表1可以看出,本实施例生产出来的16mm、抗拉强度400MPa复合制动鼓用高塑性钢带可以保障-40℃低温V型冲击,并且具有良好的塑性,利于复合制动鼓旋压变形。
实施例2
本实施例采用本公司1780生产线生产产品厚度规格为16mm、抗拉强度400MPa复合制动鼓用钢带过程为例,对本发明作进一步的说明。本实施例的复合制动鼓用高塑性钢带按以下重量百分比配比:C:0.07%,Si:0.03%,Mn:1.15%,P:0.012%,S:0.005%, Al:0.045%,余量为Fe和不可避免杂质。
本实施例的复合制动鼓用高塑性钢带生产方法包括:板坯加热、粗轧、精轧、层流冷却。
板坯加热:加热炉炉温1200~1280℃,加热时长为160min,板坯连铸下线时间不低于48小时。
所述板坯的化学成分质量百分百比为:C:0.07%,Si:0.03%,Mn:1.15%,P:0.012%,S:0.005%, Al:0.045%,余量为Fe和不可避免杂质。
轧制:粗轧过程粗除鳞保证2道次;中间坯温度为1020℃,得到中间坯厚度为49mm;精轧开轧温度970℃,精轧终轧温度870℃,轧制凸度目标≤1;
层流冷却:轧制后进行层流冷却,卷取温度635℃,卷取设置热尾,热尾温度640℃,热尾长度15m。
按照本实施例的步骤生产的钢带,其性能指标见表2。
表2 实施例2生产的16mm复合制动鼓用高塑性钢带性能
由表2可以看出,本实施例生产出来的16mm、抗拉强度400MPa复合制动鼓用高塑性钢带可以保障-40℃低温V型冲击,并且具有良好的塑性,利于复合制动鼓旋压变形。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (3)
1.一种复合制动鼓用钢带,其特征在于,所述钢带的质量百分百比为:C:0.05~0.08%,Si:≤0.10%,Mn:0.09~1.20%,P:≤0.012%,S≤0.006%,Al:0.020~0.060%,其余为Fe和不可避免杂质。
2.一种复合制动鼓用钢带的生产方法,其特征在于,包括如下步骤:
(1)板坯加热:加热炉炉温1200~1280℃,加热时长为150~200min,板坯连铸下线时间不低于48小时,
所述板坯的化学成分质量百分百比为:C:0.05~0.08%,Si:≤0.10%,Mn:0.09~1.20%,P:≤0.012%,S≤0.006%,Al:0.020~0.060%,其余为Fe和不可避免杂质;
(2)轧制:粗轧过程粗除鳞保证至少两道次;中间坯温度为990~1020℃,得到中间坯厚度为45~50mm;精轧开轧温度≤980℃,精轧终轧温度860~880℃,轧制凸度目标≤1;
(3)层流冷却:轧制后进行层流冷却,卷取温度620~640℃,卷取设置热尾,热尾温度640~660℃,热尾长度15~30m。
3.如权利要求1或2任一项所述的一种复合制动鼓用钢带在复合制动鼓上的应用。
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