The invention discloses a hot-dip galvanized sheet and a production method thereof. The chemical composition of hot galvanized plate quality percentage: C, 0.01 0.016%; Si = 0.03%; Mn, 0.15 0.25%; P = 0.01%; S = 0.01%; Alt, 0.045 0.08%; N = 0.003%; B, 0.0018 Fe and 0.0028%; allowance for impurities. The hot phase of the production method, control of slab heating temperature and finish rolling temperature, finishing rolling, laminar cooling stage after cooling by a steel mill sparse, relaxation cooling, coiling temperature control, curling into the insulation insulation insulation pit pit, control the temperature, then cooled to room temperature. The purpose of the invention is to provide a hot-dip galvanized sheet and a method of producing the same so as to prevent rolling and edge raising after color coating.
【技术实现步骤摘要】
热镀锌板及其生产方法
本专利技术涉及金属材料加工领域,涉及一种能够避免热镀锌板在彩涂后辊压起棱的家电用热镀锌板及其生产方法。
技术介绍
用热镀锌板生产家电面板的一般工艺流程为:彩涂——剪切——辊压成形,彩涂后的铝镇静钢热镀锌板在辊压过程中常出现起棱现象,造成废品率偏高,使成本提高。铝镇静钢热镀锌板起棱的本质原因是应变时效现象造成的,即由于热镀锌板在经过彩涂过程的高温烘烤后,基体中出现大量固溶碳氮原子,对位错进行钉扎,从而使热镀锌板在辊压成形过程中在表面形成滑移线而起棱。应从化学成分和生产方法上尽量降低热镀锌板铁素体组织中的固溶碳和固溶氮含量。现有的低碳铝镇静钢热镀锌板的生产工艺流程为:铁水预处理→转炉→RH精炼→板坯浇注→钢坯精整→板坯加热→粗轧→精轧→卷曲→开卷→焊接→酸洗→冷轧→卷曲→开卷→焊接→清洗→退火→热镀锌→光整→拉矫→钝化→涂油→卷曲。其中,热轧后层冷阶段一般采用前段冷却迅速将钢板冷却到卷曲温度,卷曲后冷却过程中钢卷内外圈由于冷速快影响了碳化物和氮化物析出,使热镀锌板头尾固溶碳和固溶氮比中部多,在彩涂后辊压过程中头部和尾部更容易出现起棱问题。热镀锌卷头尾只能切掉降级或完全成为废品,造成很大浪费。
技术实现思路
本专利技术要解决的技术问题是提供一种能够避免在彩涂后辊压起棱的热镀锌板,同时,还提供了该热镀锌板的生产方法,能够避免通卷特别是头尾在彩涂后辊压起棱。本专利技术中的热镀锌板,所述热镀锌板的化学成分质量百分比为:C,0.010-0.016%;Si≤0.03%;Mn,0.15-0.25%;P≤0.010%;S≤0.010%;Alt,0.045-0 ...
【技术保护点】
一种热镀锌板,其特征在于,所述热镀锌板的化学成分质量百分比为:C,0.010‑0.016%;Si≤0.03%;Mn,0.15‑0.25%;P≤0.010%;S≤0.010%;Alt,0.045‑0.08%;N≤0.0030%;B,0.0018‑0.0028%;余量为Fe和不可避免的杂质。
【技术特征摘要】
1.一种热镀锌板,其特征在于,所述热镀锌板的化学成分质量百分比为:C,0.010-0.016%;Si≤0.03%;Mn,0.15-0.25%;P≤0.010%;S≤0.010%;Alt,0.045-0.08%;N≤0.0030%;B,0.0018-0.0028%;余量为Fe和不可避免的杂质。2.根据权利要求1所述的热镀锌板,其特征在于:所述热镀锌板的化学成分质量百分比为:C,0.01%;Si,0.015%;Mn,0.25%;P,0.008%;S,0.01%;Alt,0.08%;N,0.003%;B,0.0028%;余量为Fe和不可避免的杂质。3.根据权利要求1所述的热镀锌板,其特征在于:所述热镀锌板的化学成分质量百分比为:C,0.012%;Si,0.02%;Mn,0.2%;P,0.009%;S,0.008%;Alt,0.06%;N,0.0025%;B,0.0022%;余量为Fe和不可避免的杂质。4.根据权利要求1所述的热镀锌板,其特征在于:所述热镀锌板的化学成分质量百分...
【专利技术属性】
技术研发人员:胡燕慧,张浩,李洁,滕华湘,刘光明,崔阳,
申请(专利权)人:首钢总公司,
类型:发明
国别省市:北京,11
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