The present invention discloses an hypereutectoid ball steel and its preparation method. The mass percentage of the chemical composition of the steel is: C:0.90 0.96%, Si:0.20, 0.98%, Cr:0.35 0.45%, P: < 0.025%, S: < 0.015%, Ni: < 0.10%, Cu: < 0.30%, Mo: < 0 5%, Ti:0.010 0.050%, Al: < 0.030%, the rest are Fe and unavoidable impurities, and the range of DI values is 3.5, and the DI is defined as (0.062+0.409C 1+3.333Mn) * (1+0.7Si) * (1+2.16Cr) * (1+3Mo) x (1+0.363Ni). The invention adopts electric furnace smelting, LF refining, vacuum treatment and soft blowing process. Casting billet is cast with continuous casting. The hot rolled round steel is prepared by controlling heating temperature, heating time, rolling temperature, finish rolling temperature and slow cooling time after rolling.
【技术实现步骤摘要】
一种过共析磨球用钢及其制备方法
本专利技术属于矿山机械用钢
,具体涉及一种过共析磨球用钢及其制造技术。
技术介绍
磨球是广泛应用于冶金、矿山、建材和电力等行业的主要易损件,全球年消耗量在500万吨以上。伴随着矿山开采业的飞速发展,对磨球用钢的质量提出了较高的要求,要求其具有良好的内部质量及耐磨性,整体硬度的均匀性要好,并且要有良好的韧性,以降低在矿料破碎中耐磨材料的消耗。如下为现有技术中设计磨球用钢的一些报道:CN107574380A公开了一种高硬度细晶粒大规格锻造磨球用钢,其包括的化学成分组成及质量百分数为:C:0.70~0.85%、Mn:1.0~1.3%、Cr:0.8~0.95%、Si:0.6~0.8%、Mo:0.08~0.3%、Nb:0.02~0.06%、Al:0.01~0.06%、Cu:≤0.01%、S:≤0.025%、P:≤0.025%、其余为铁。CN106834959A公开了一种高硬度耐磨球料用钢,其化学组分按质量百分数包括C0.55~0.70%、Si1.65~1.90%、Mn0.60~0.80%、P≤0.025%、S≤0.025%、Al≤0.020%、Cr0.60~0.90%、Ni≤0.03%、Mo≤0.02%、Cu≤0.025%、As≤0.020%、Sn≤0.020%、Sb≤0.004%、Pb≤0.0025%,其它为Fe和杂质。CN104762562B公开了一种大直径磨球用钢及其制造方法,其组成按质量百分数为:C:0.71%~0.79%、Si:0.25%~0.35%、Mn:0.80%~0.95%、Cr:0.80%~0.90%、P:≤0 ...
【技术保护点】
1.一种过共析磨球用钢,其特征在于:所述过共析磨球用钢的化学成分的质量百分比为:C:0.90‑0.96%,Si:0.20‑0.30%,Mn:0.91‑0.98%,Cr:0.35‑0.45%,P:≤0.025%,S:≤0.015%,Ni:≤0.10%,Cu:≤0.30%,Mo:≤0.05%,Ti:0.010‑0.050%,Al:≤0.030%,其余为Fe和不可避免的杂质,且DI取值范围为2.5‑3.5,所述DI定义为(0.062+0.409C‑0.135C2)×(1+3.333Mn)×(1+0.7Si)×(1+2.16Cr)×(1+3Mo)×(1+0.363Ni)×(1+0.365Cu)。
【技术特征摘要】
1.一种过共析磨球用钢,其特征在于:所述过共析磨球用钢的化学成分的质量百分比为:C:0.90-0.96%,Si:0.20-0.30%,Mn:0.91-0.98%,Cr:0.35-0.45%,P:≤0.025%,S:≤0.015%,Ni:≤0.10%,Cu:≤0.30%,Mo:≤0.05%,Ti:0.010-0.050%,Al:≤0.030%,其余为Fe和不可避免的杂质,且DI取值范围为2.5-3.5,所述DI定义为(0.062+0.409C-0.135C2)×(1+3.333Mn)×(1+0.7Si)×(1+2.16Cr)×(1+3Mo)×(1+0.363Ni)×(1+0.365Cu)。2.如权利要求1所述的过共析磨球用钢,其特征在于,所述过共析磨球用钢的化学成分质量百分比为:C:0.90-0.93%、Si:0.23-0.28%、Mn:0.91-0.95%、Cr:0.35-0.40%、P:≤0.025%、S:≤0.015%、Ni:≤0.10%、Cu:≤0.10%、Mo:≤0.05%、Ti:0.010-0.030%、Al:0.015-0.030%,其余为Fe和不可避免的杂质。3.如权利要求1或2所述的过共...
【专利技术属性】
技术研发人员:梁娜,郭磊,吴德发,刘亚丽,戈文英,
申请(专利权)人:山东钢铁股份有限公司,
类型:发明
国别省市:山东,37
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。