CN113278893A - 一种泉域复杂条件下盾构机刀具用钢成分及制备 - Google Patents
一种泉域复杂条件下盾构机刀具用钢成分及制备 Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
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- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 4
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- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
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- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 4
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
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Abstract
本发明提供一种盾构机刀具用钢的成分配比及其制备方法,提供的成分及质量百分比为:C:0.41%‑0.47%,Si:0.9%‑1.2%,Mn:0.34%‑0.38%,P:0.015%‑0.017%,S:0.04%‑0.06%,Mg:0.0001%‑0.0002%,Cr:4.8%‑5.0%,Ni:0.23%‑0.26%,Mo:1.4%‑1.7%,Cu:0.07%‑0.09%,Al:0.2%‑0.4%,Ti:0.018%‑0.02%,V:0.8%‑1.0%,Nb:0.01%‑0.03%,W:0.03%‑0.06%,B:0.0015%‑0.002%,Ce:0.016%‑0.02%,La:0.001%‑0.003%,余量为铁和不可避免杂质,本发明将粉末在超声的条件下,经过球磨机充分研磨混合,后经粉末冶金工艺成型后在进行热处理得到刀具材料。
Description
技术领域
本发明涉及一种合金材料及其制备方法,特别是涉及一种刀具用合金钢及其制备方法,应用于高耐磨高韧性合金钢及其制造工艺技术领域。
背景技术
由于地球人口的增长和城市化进程的加剧,人们把越来越多的目光聚焦到地下空间的开发与利用。这就极大地促进了隧道及地下工程修建技术的发展和应用。在隧道及地下工程众多的修建方法中,盾构法隧道施工技术以其机械化施工、对周围环境影响较小等优点在世界各国被广泛应用。盾构隧道掘进机(简称“盾构机”)是盾构施工方法的主要施工机械,它实质就是一个既可以支承地层压力又可以在地层中推进的活动钢筒结构。根据地质条件的变化,以及盾构机械的发展与改进,在钢筒结构的前端、中段、尾部以及盾构后续部分与地面上,综合配有各种不同的挖掘、顶进、转向、支护、排渣、衬砌、运输等机械,形成一个完整的施工机械***。
由于刀具在掘进时既要耐磨,又要在遭受巨大冲击时避免崩裂或塑性变形,所以刀具材料应具有高硬度、高强度及良好的冲击韧性。市场上的盾构机刀具材料主要有国外的美国Robbins、德国Wirth合金钢,国内常用H13和研发的HH201、HH301、SDH55等。这些合金钢的含C量在0 .3-0 .6wt .%,合金元素种类不一、含量各异,通过不同的压力加工、热处理方法,达到硬度和韧性的优化匹配,虽然这些盾构机刀具用合金钢具有较好的性能,但是面对复杂泉域条件下高硬度且高冲击韧性的刀具需求,则需要制备综合性能更好的盾构机用刀具。
发明内容
本发明的目的是克服现有技术中存在的刀具用钢综合性能差的问题,提供了一种泉域复杂条件下盾构机刀具用钢成分及制备方法,基于目前现有刀具成分进行优化,进一步完善成分配比,改善现有刀具使用寿命低,强度韧性无法满足复杂泉域条件而经常损坏的现象。
为实现以上目的,本发明的技术解决方案是:
一种泉域复杂条件下盾构机刀具用钢成分及制备,其特征在于:所述盾构机刀具用钢的成分及质量百分比为:C:0.41%-0.47%,Si:0.9%-1.2%,Mn:0.34%-0.38%,P:0.015%-0.017%,S:0.04%-0.06%,Mg:0.0001%-0.0002%,Cr:4.8%-5.0%,Ni:0.23%-0.26%,Mo:1.4%-1.7%,Cu:0.07%-0.09%,Al:0.2%-0.4%,Ti:0.018%-0.02%,V:0.8%-1.0%,Nb:0.01%-0.03%,W:0.03%-0.06%,B:0.0015%-0.002%,Ce:0.016%-0.02%,La:0.001%-0.003%,余量为铁和不可避免杂质。
一种盾构机刀具用钢的制造方法,所述制造方法包括以下步骤:
将原料成分配比完成后,将其放入球磨罐,加入无水乙醇球磨10h并在干燥箱中干燥6h,最后对混合粉料研磨和过筛获得均匀的复合粉料。
采用容积装粉法,装粉盒后退时刮平阴模上表面。
将粉料装好后,通过压机压制成刀具坯料,压机设定压力为630t,压制成坯料尺寸为100 mm×50mm×50mm。
将坯料在烧结炉中烧结,烧结过程中通入氨气作为保护气氛,热处理过程中,热源放置在坯料的一侧,烧结过程中形成一个温度的梯度,烧结温度设置为1000℃,烧结时间为120min,加热完毕后,在另一侧冷却,使温度降低存在一定的梯度,这样就能使坯料存在一个热处理温度差,然后在进行200℃低温回火90min,提高热稳定性。
最终形成的刀具材料,同时兼顾硬度和韧性,更加适应复杂泉域条件下变化多样的地质。
具体实施方式
下面给出本发明的最佳实施例。
盾构机刀具用钢的成分及质量百分比为:C:0.41%-0.47%,Si:0.9%-1.2%,Mn:0.34%-0.38%,P:0.015%-0.017%,S:0.04%-0.06%,Mg:0.0001%-0.0002%,Cr:4.8%-5.0%,Ni:0.23%-0.26%,Mo:1.4%-1.7%,Cu:0.07%-0.09%,Al:0.2%-0.4%,Ti:0.018%-0.02%,V:0.8%-1.0%,Nb:0.01%-0.03%,W:0.03%-0.06%,B:0.0015%-0.002%,Ce:0.016%-0.02%,La:0.001%-0.003%,余量为铁和不可避免杂质。
原料成分配比完成后,将其放入球磨罐,加入无水乙醇球磨10h并在干燥箱中干燥6h,最后对混合粉料研磨和过筛获得均匀的复合粉料。
采用容积装粉法,装粉盒后退时刮平阴模上表面,将粉料装好后,通过压机压制成刀具坯料,压机设定压力为630t,压制成坯料尺寸为100 mm×50mm×50mm。
将坯料在烧结炉中烧结,烧结过程中通入氨气作为保护气氛,热处理过程中,热源放置在坯料的一侧,烧结过程中形成一个温度的梯度,烧结温度设置为1000℃,烧结时间为120min,加热完毕后,在另一侧冷却,使温度降低存在一定的梯度,这样就能使坯料存在一个热处理温度差,然后在进行200℃低温回火90min,最终得到兼顾硬度和韧性,更加适应复杂泉域条件下变化多样的地质的刀具材料。
Claims (7)
1.一种泉域复杂条件下盾构机刀具用钢成分及制备,其特征在于:所述盾构机刀具用钢的成分及质量百分比为:C:0.41%-0.47%,Si:0.9%-1.2%,Mn:0.34%-0.38%,P:0.015%-0.017%,S:0.04%-0.06%,Mg:0.0001%-0.0002%,Cr:4.8%-5.0%,Ni:0.23%-0.26%,Mo:1.4%-1.7%,Cu:0.07%-0.09%,Al:0.2%-0.4%,Ti:0.018%-0.02%,V:0.8%-1.0%,Nb:0.01%-0.03%,W:0.03%-0.06%,B:0.0015%-0.002%,Ce:0.016%-0.02%,La:0.001%-0.003%,余量为铁和不可避免杂质,在超声条件下,在氩气气氛的条件下进行球磨,得到混合粉末后通过粉末冶金工艺制备,通过后续热处理得到成品。
2.根据权利要求1所述的一种泉域复杂条件下盾构机刀具用钢成分及制备,其特征在于:将原料放入球磨罐中,以无水乙醇为球磨介质,球磨10 h后在干燥箱中干燥6 h,最后对混合粉料进行研磨和过筛即获得均匀的复合粉料。
3.根据权利要求1所述的一种泉域复杂条件下盾构机刀具用钢成分及制备,其特征在于:将混合好的粉料压制成型,压制工序采用容积装粉法;装粉盒后退时刮平阴模上表面,保证装粉的均匀性。
4.根据权利要求1所述的一种泉域复杂条件下盾构机刀具用钢成分及制备,其特征在于:将粉料装好后,通过压机压制成刀具坯料准备下一步热处理,压机设定压力为630t,坯料尺寸为100mm×50mm×50mm。
5.根据权利要求1所述的一种泉域复杂条件下盾构机刀具用钢成分及制备,其特征在于:将坯料在烧结炉中烧结,烧结过程中通入氨气作为保护气氛,热处理过程中,热源放置在坯料的一侧,烧结过程中形成一个温度的梯度,烧结温度设置为1000℃,烧结时间为120min,加热完毕后,在另一侧冷却,使温度降低存在一定的梯度,这样就能使坯料存在一个热处理温度差,然后在进行200℃低温回火90min,提高热稳定性。
6.根据权利要求1所述的一种泉域复杂条件下盾构机刀具用钢成分及制备,其特征在于:在此类材料配比中得到刀具有较大的硬度,较强的韧性以满足刀具在复杂泉域条件下,地质地层复杂,短距离地层变化快,同一断面地层分布复杂,变化不规律,常出现大粒径孤石、空洞、强风化闪长岩及中风化闪长岩地层同时存在的情况,延长刀具的更换周期。
7.根据权利要求1所述的一种泉域复杂条件下盾构机刀具用钢成分及制备,其特征在于:采用新型的热处理方式,能够同时兼顾刀具的硬度和韧性,使得盾构机刀具在复杂泉域条件硬岩和孤石同时存在,地形复杂的情况下,能够进一步延长使用寿命,减少换刀次数。
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