CN114875332A - 一种免退火处理的80公斤以上级高强合金焊丝用盘条的生产方法 - Google Patents
一种免退火处理的80公斤以上级高强合金焊丝用盘条的生产方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000004321 preservation Methods 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 238000005096 rolling process Methods 0.000 claims abstract description 13
- 238000000137 annealing Methods 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 238000009987 spinning Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 229910000600 Ba alloy Inorganic materials 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 4
- 229910001309 Ferromolybdenum Inorganic materials 0.000 claims description 4
- 229910000863 Ferronickel Inorganic materials 0.000 claims description 4
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 4
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims description 4
- 229910000628 Ferrovanadium Inorganic materials 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 229910000676 Si alloy Inorganic materials 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 238000005275 alloying Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 4
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000011572 manganese Substances 0.000 claims description 4
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- -1 silicon-aluminum-barium Chemical compound 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 238000009749 continuous casting Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 229910001563 bainite Inorganic materials 0.000 abstract description 6
- 229910000734 martensite Inorganic materials 0.000 abstract description 6
- 229910052785 arsenic Inorganic materials 0.000 abstract description 5
- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 229910052718 tin Inorganic materials 0.000 abstract description 5
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 229910052748 manganese Inorganic materials 0.000 abstract description 3
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
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- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
一种免退火处理的80公斤以上级高强合金焊丝用盘条的生产方法,工艺路线为转炉‑LF‑连铸‑高线轧制,其特征在于:钢的化学组成重量百分比为C=0.05%~0.09%,Si=0.70%~0.90%,Mn=1.45%~1.60%,Mo=0.30%~0.60%,Ni=0.70%~1.0%,Ti=0.05%~0.15%,V=0.15%~0.25%,P≤0.015%,S≤0.015%,Cu≤0.10%,Al≤0.010%,Cr≤0.10%,As≤0.015%,Sn≤0.015%,其余为Fe和不可避免的杂质。本发明利用钢厂现有设备和工艺条件,通过在集卷小车和PF链区域增加保温箱装置的方法,解决了现有高速线材厂生产的高强合金焊丝用钢盘条因存在贝氏体马氏体组织在不退火的情况下不能深拉的问题。
Description
技术领域
本发明属于冶金技术领域,涉及一种免退火处理的80公斤以上级高强合金焊丝用盘条的生产方法。
背景技术
高强合金焊丝被越来越广泛地应用于工程机械、起重机械、压力容器、大型船舶、油气管道、轻量化车体等重要结构的焊接。传统高强合金焊丝的拉丝工艺是∮5.5mm规格的盘条经退火处理后拉拔至∮1.0-1.6mm的成品规格,而生产企业为了提高产品竞争力,基于简化工艺、节约成本的考虑,盘条不经退火处理直接拉拔至∮1.0~1.6mm的成品规格成了现实需求。一般高速线材厂受限于吐丝后散卷保温辊道的长度而使保温时间不够,生产的高强合金焊丝用盘条金相组织存在贝氏体马氏体组织,不能免退火拉拔至成品规格。
发明内容
本发明的目的在于提供一种免退火处理的80公斤以上级高强合金焊丝用盘条的生产方法,解决现有高速线材厂生产的高强合金焊丝用钢盘条因存在贝氏体马氏体组织在不退火的情况下不能深拉的问题。
本发明的技术方案:
一种免退火处理的80公斤以上级高强合金焊丝用盘条的生产方法,工艺路线为转炉-LF-连铸-高线轧制,钢的化学组成重量百分比为C=0.05%~0.09%,Si=0.70%~0.90%,Mn=1.45%~1.60%,Mo=0.30%~0.60%,Ni=0.70%~1.0%, Ti=0.05%~0.15%,V=0.15%~0.25%,P≤0.015%,S≤0.015%,Cu≤0.10%,Al≤0.010%,Cr≤0.10%,As≤0.015%,Sn≤0.015%,其余为Fe和不可避免的杂质;关键工艺步骤包括:
(1)铁水残余元素应满足Cu≤0.10%、Cr≤0.10%、As≤0.015%、Sn≤0.015%;
(2)转炉出钢过程加入硅铝钡合金、锰硅合金、硅铁合金、钼铁合金、电解镍或镍铁合金进行脱氧合金化;
(3)LF加入石灰造白渣,使用硅铁粉脱氧,当S≤0.015%,定氧≤10ppm后加入钛铁、钒铁进行成分调整;最后一次送电前采用金属锰、高纯硅调整成份;
(4)采用150方小方坯连铸,全程保护浇铸;
(5)轧制∮5.5mm规格线材,轧钢吐丝温度750~780℃;
(6)吐丝后散卷保温辊道入罩温度660~680℃,出罩温度搭接点550~580℃,非搭接点520~550℃,辊道上盘条冷却速度≤1℃/s;
(7)在集卷小车和PF链区域增加保温箱装置,C型钩和盘条在保温箱中行进,控制盘条冷却速度≤1℃/S。
本发明的原理:在吐丝后由于散卷保温辊道较短导致保温时间不够,珠光体组织转变不充分,后续过程产生贝氏体马氏体等影响拉拔性能的不良组织,为抑制贝氏体马氏体组织的产生,在集卷小车和PF链区域增加保温箱装置,C型钩和盘条在保温箱中行进,控制盘条冷却速度≤1℃/S,盘条金相组织为铁素体+珠光体组织。
本发明的有益效果:利用钢厂现有设备和工艺条件,通过在集卷小车和PF链区域增加保温箱装置的方法,解决了现有高速线材厂生产的高强合金焊丝用钢盘条因存在贝氏体马氏体组织在不退火的情况下不能深拉的问题。
附图说明
图1 为本实施例钢的金相组织照片(100倍)。
具体实施方式
实施例1
一种免退火处理的80公斤以上级高强合金焊丝用盘条的生产方法,钢的组成重量百分比为C= 0.07%,Si=0.75%,Mn=1.52%,Mo=0.48%,Ni=0.83%, Ti=0.09%,V=0.18%,P=0.012%,S=0.010%,Cu=0.04%,Al=0.006%,Cr=0.05%,As=0.05%,Sn=0.003%,其余为Fe和不可避免的杂质;工艺路线为转炉-LF-连铸-高线轧制;关键工艺步骤包括:
(1)铁水残余元素Cu=0.04%、Cr=0.04%、As=0.05%、Sn=0.03%;
(2)转炉出钢过程加入硅铝钡合金、锰硅合金、硅铁合金、钼铁合金、电解镍或镍铁合金进行脱氧合金化;
(3)LF加入石灰造白渣,使用硅铁粉脱氧,检测S硫含量0.078%,定氧8ppm后加入钛铁、钒铁进行成分调整;最后一次送电前采用金属锰、高纯硅调整成份;
(4)采用150方小方坯连铸,全程保护浇铸;
(5)轧制∮5.5mm规格线材,轧钢吐丝温度752~771℃;
(6)吐丝后散卷保温辊道入罩温度660~675℃,出罩温度搭接点553~572℃,非搭接点520~541℃,辊道上盘条冷却速度0.5℃/s;
(7)在集卷小车和PF链区域增加保温箱装置,C型钩和盘条在保温箱中行进,盘条冷却速度0.85℃/s。
对样品进行检测,抗拉强度832MPa,金相组织为F+P。
实施例2
一种免退火处理的80公斤以上级高强合金焊丝用盘条的生产方法,钢的组成重量百分比为C=0.06%,Si=0.78%,Mn=1.55%,Mo=0.55%,Ni=0.86%, Ti=0.11%,V=0.20%,P=0.011%,S=0.008%,Cu=0.04%,Al=0.008%,Cr=0.06%,As=0.04%,Sn=0.004%,其余为Fe和不可避免的杂质;工艺路线为转炉-LF-连铸-高线轧制,关键工艺步骤包括:
(1)铁水残余元素Cu=0.04%、Cr=0.05%、As=0.04%、Sn=0.004%;
(2)转炉出钢过程加入硅铝钡合金、锰硅合金、硅铁合金、钼铁合金、电解镍或镍铁合金进行脱氧合金化;
(3)LF加入石灰造白渣,使用硅铁粉脱氧,检测硫含量S=0.065%,定氧7ppm后加入钛铁、钒铁进行成分调整;最后一次送电前采用金属锰、高纯硅调整成份;
(4)采用150方小方坯连铸,全程保护浇铸;
(5)轧制∮5.5mm规格线材,轧钢吐丝温度760~778℃;
(6)吐丝后散卷保温辊道入罩温度662~679℃,出罩温度搭接点553~575℃,非搭接点523~546℃,辊道上盘条冷却速度0.5℃/s;
(7)在集卷小车和PF链区域增加保温箱装置,C型钩和盘条在保温箱中行进,盘条冷却速度0.77℃/s。
对样品进行检测,抗拉强度824MPa,金相组织为F+P。
Claims (1)
1.一种免退火处理的80公斤以上级高强合金焊丝用盘条的生产方法,工艺路线为转炉-LF-连铸-高线轧制,其特征在于:钢的化学组成重量百分比为C=0.05%~0.09%,Si=0.70%~0.90%,Mn=1.45%~1.60%,Mo=0.30%~0.60%,Ni=0.70%~1.0%, Ti=0.05%~0.15%,V=0.15%~0.25%,P≤0.015%,S≤0.015%,Cu≤0.10%,Al≤0.010%,Cr≤0.10%,As≤0.015%,Sn≤0.015%,其余为Fe和不可避免的杂质;关键工艺步骤包括:
(1)铁水残余元素应满足Cu≤0.10%、Cr≤0.10%、As≤0.015%、Sn≤0.015%;
(2)转炉出钢过程加入硅铝钡合金、锰硅合金、硅铁合金、钼铁合金、电解镍或镍铁合金进行脱氧合金化;
(3)LF加入石灰造白渣,使用硅铁粉脱氧,当S≤0.015%,定氧≤10ppm后加入钛铁、钒铁进行成分调整;最后一次送电前采用金属锰、高纯硅调整成份;
(4)采用150方小方坯连铸,全程保护浇铸;
(5)轧制∮5.5mm规格线材,轧钢吐丝温度750~780℃;
(6)吐丝后散卷保温辊道入罩温度660~680℃,出罩温度搭接点550~580℃,非搭接点520~550℃,辊道上盘条冷却速度≤1℃/S;
(7)在集卷小车和PF链区域增加保温箱装置,C型钩和盘条在保温箱中行进,控制盘条冷却速度≤1℃/s。
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