CN110373524B - 一种90公斤级焊丝用钢热处理软化工艺 - Google Patents

一种90公斤级焊丝用钢热处理软化工艺 Download PDF

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CN110373524B
CN110373524B CN201910641329.9A CN201910641329A CN110373524B CN 110373524 B CN110373524 B CN 110373524B CN 201910641329 A CN201910641329 A CN 201910641329A CN 110373524 B CN110373524 B CN 110373524B
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steel
welding wire
cooling
equal
heating
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CN110373524A (zh
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张贺佳
孙显东
孔超
贾元海
汪清山
刘居鹏
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HBIS Co Ltd Chengde Branch
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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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/525—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length for wire, for rods
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)

Abstract

本发明公开了一种90公斤级焊丝用钢热处理软化工艺，本工艺包括以下步骤：加热、保温和缓冷。冷却工序：冷却时将钢材冷却至630℃‑650℃保温，保温时间≥1 h。适用于本工艺的焊丝用钢化学成分重量百分比为：C：0.07～0.11%,Si：0.40～0.60%，Mn：1.60～1.90%，Ni：2.10～2.50%，Mo：0.55～0.75%，Cr：0.35～0.50%，Ti：0.05～0.10%，其余为Fe和不可避免的杂质元素。本发明工艺简单，软化效果好，经该工艺处理后焊丝用钢抗拉强度≤580 MPa，断后延伸率≥35%，断面收缩率≥75%。

Description

一种90公斤级焊丝用钢热处理软化工艺
技术领域
本发明属于冶金工艺领域，具体涉及一种高强焊丝用钢热处理软化工艺。
背景技术
随着机械设备轻量化和高强钢的发展，对高强焊丝用钢的需求也越来越大。高强焊丝是由热轧盘条经拉拔而成。由于高强焊丝含有大量合金元素，使得轧制后的热轧盘条含有大量非平衡组织，强度较高，给拉拔带来较大困难。另外，盘条经多道次拉拔后也会产生较大的加工硬化，强度急剧升高，给后续拉拔带来困难。因此，本发明针对上述问题，开发了一种90公斤级焊丝用钢的热处理软化工艺。
发明内容
本发明旨在解决的工艺问题是提供一种90公斤级焊丝用钢热处理软化工艺。
为实现上述发明，采取如下工艺方案：
一种90公斤级焊丝用钢热处理软化工艺，所述焊丝用钢的化学成分重量百分比为：C：0.07～0.11%,Si≤0.40～0.60%，Mn：1.60～1.90%，Ni：2.10～2.50%，Mo：0.55～0.75%，Cr：0.35～0.50%，Ti：0.05～0.10%，其余为Fe和不可避免的杂质元素；
软化工艺包括以下工序：加热、保温和冷却；冷却工序：冷却时将钢材冷却至630℃-650℃保温，保温时间≥1 h。
进一步地，所述加热工序：将所述焊丝用钢放入加热炉中，然后加热至860℃-895℃。
进一步地，所述保温工序：加热工序加热至860℃-895℃后保温，保温时间为将材料烧透后即材料内外温度均匀后的保温时间，为10-30 min。
进一步地，所述冷却工序：冷却时将钢材冷却至630℃-650℃保温，保温时间≥1h；达到保温时间后冷却至出炉温度即可出炉，冷速和出炉温度不限。为提高生产效率，可加快冷速或在较高温度出炉。
进一步地，将焊丝加热至875℃-890℃。
进一步地，经热处理软化退火后焊丝用钢抗拉强度≤580 MPa，断后延伸率≥35%，断面收缩率≥75%。
采用上述工艺方案的有益效果在于：
本发明通过合金热力学和动力学计算，再结合实验分析测试，确定出合金相变温度区间和相变驱动力，最终设计出一种热处理软化工艺，该工艺处理后的材料性能效果好且稳定，且可显著缩短热处理时间，提高生产效率。
具体实施方式
下面结合具体实施例对本发明做进一步详细的说明。
选取的样品为直径5.5 mm的热轧盘条，实施例1-5分别截取其中的一段，实施例中样品的化学成分如表1所示。
表1实施例化学成分（重量百分比）
Figure DEST_PATH_IMAGE002
实验采用井式炉，炉温从室温升至预设加热温度，升温时间均为1.5 h，保温20min后盘条内外温度均匀，经保温后冷却至预设温度，再经保温后快冷至100℃出炉，具体工艺参数及性能如表2所示。
表2实施例工艺参数及性能
Figure DEST_PATH_IMAGE004
以上实施例仅用以说明而非限制本发明的工艺方案，尽管参照上述实施例对本发明进行了详细说明，本领域的普通工艺人员应当理解：依然可以对本发明进行修改或者等同替换，而不脱离本发明的精神和范围的任何修改或局部替换，其均应涵盖在本发明的权利要求范围当中。

Claims (1)

1.一种90公斤级焊丝用钢热处理软化工艺，其特征在于，所述焊丝用钢的化学成分重量百分比为：C：0.07～0.11%,Si：0.40～0.60%，Mn：1.60～1.90%，Ni：2.36～2.50%，Mo：0.55～0.75%，Cr：0.35～0.50%，Ti：0.05～0.10%，其余为Fe和不可避免的杂质元素；
软化工艺包括以下工序：加热、保温和冷却；所述加热工序：将所述焊丝用钢放入加热炉中，然后加热至875℃-890℃；所述保温工序：加热工序加热至875℃-890℃后保温，保温时间为将材料烧透后即材料内外温度均匀后的保温时间，为10-30min；所述冷却工序：冷却时将钢材冷却至630℃-650℃保温，保温时间1-3h；达到保温时间后冷却至出炉温度即可出炉，冷速和出炉温度不限；
经热处理软化退火后焊丝用钢抗拉强度≤580 MPa，断后延伸率≥35%，断面收缩率≥75%。
CN201910641329.9A 2019-07-16 2019-07-16 一种90公斤级焊丝用钢热处理软化工艺 Expired - Fee Related CN110373524B (zh)

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