CN106141169B - 一种用于3d打印的金属粉料及其制备方法 - Google Patents
一种用于3d打印的金属粉料及其制备方法 Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 94
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
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Abstract
本发明涉及一种用于3D打印的金属粉料及其制备方法,它由铁基合金粉末和碳粉按质量比100~400∶1混合获得,所述铁基合金粉末的粒径为20~60μm,所述碳粉的粒径为50nm~2μm,所述铁基合金粉末包括以下重量百分含量的成分:C0.01~0.03%,Si0.5~1%,Mn0.1~0.3%,Ti3~5%,Mg0.2~0.5%,V0.15~0.2%;Cr0.1~0.15%;Sr0.01~0.05%;余量为Fe和不可避免的杂质。通过采用特定配方的铁基合金粉末与碳粉按比例进行混合,这样能够确保金属元素在高温烧结时不会被氧化并使得高含量的Fe和Ti填充于基体的孔隙之中,从而可提高烧结坯体的密度,获得高强度的打印制品。
Description
技术领域
本发明属于金属材料领域,涉及一种合金粉体,具体涉及一种用于3D打印的金属粉料及其制备方法。
背景技术
在3D打印的诸多材料中,金属材料是应用最为广泛的材料。目前金属材料的3D打印方法主要有选择性激光烧结、直接能量沉积、微喷射粘结等。相比之下,微喷射粘结这种方法的成本较低,工艺较简单,具有良好的应用前景。这种方法是利用喷头按照一定的路径向铺好的金属粉末上喷射粘结剂,将一定位置上的粉末粘接住,形成三维构件轮廓的一层。然后再铺一层新的金属粉末,再进行喷射粘接。如此多层粘接叠加,就能够得到三维的粘接坯体。这种粘接的坯体密度低、强度小,还需要进行脱脂、烧结才能够获得一定密度、强度的三维打印制品。然而,现有的粉体容易导致粘结力差,使得粘接坯体脱脂后密度较低,孔隙较多。
发明内容
本发明目的是为了克服现有技术的不足而提供一种用于3D打印的金属粉料。
为达到上述目的,本发明所采用的技术方案为:一种用于3D打印的金属粉料,它由铁基合金粉末和碳粉按质量比100~400∶1混合获得,所述铁基合金粉末的粒径为20~60μm,所述碳粉的粒径为50nm~2μm,所述铁基合金粉末包括以下重量百分含量的成分:
余量为Fe和不可避免的杂质。
优化地,所述铁基合金粉末包括以下重量百分含量的成分:
余量为Fe和不可避免的杂质。
本发明的又一目的在于提供一种上述用于3D打印的金属粉料的制备方法,它包括以下步骤:
(a)用含C、Si、Mn、Ti、Mg、V、Cr、Sr、Fe元素的原料配成铁基合金原料粉末;
(b)采用氢气或者氩气作为载气将所述铁基合金原料粉末送入等离子体炬中汽化熔炼,形成合金体;所述载气的流量0.2~1m3/h,送料速率为1~20g/min;
(c)用冷却气对所述合金体进行热交换,形成微细球形铁基合金粉末,所述冷却气流量为1~15m3/h;
(d)将所述铁基合金粉末导入气固分离室收集固体粉末;
(e)将所述铁基合金粉末与所述碳粉按配方比混合后,研磨即可。
优化地,所述等离子体炬的功率为5~15kW,发生气为流量5~10m3/h的氩气,边气为流量5~20m3/h的氩气,压力范围为负压100~150mm汞柱。
由于上述技术方案运用,本发明与现有技术相比具有下列优点:本发明用于3D打印的金属粉料,通过采用特定配方的铁基合金粉末与碳粉按比例进行混合,这样能够确保金属元素在高温烧结时不会被氧化并使得高含量的Fe和Ti填充于基体的孔隙之中,从而可提高烧结坯体的密度,获得高强度的打印制品。
具体实施方式
下面将对本发明优选实施方案进行详细说明。
实施例1
本实施例提供一种用于3D打印的金属粉料,它由铁基合金粉末和碳粉按质量比100∶1混合获得,铁基合金粉末的平均粒径为20μm,碳粉的平均粒径为50nm,铁基合金粉末包括以下重量百分含量的成分:0.01%C、1%Si、0.3Mn、5%Ti、0.2%Mg、0.2%V、0.1%Cr、0.05%Sr,余量为Fe和不可避免的杂质。
上述用于3D打印的金属粉料的制备方法,它包括以下步骤:
(a)用含C、Si、Mn、Ti、Mg、V、Cr、Sr、Fe元素的原料配成铁基合金原料粉末(根据元素选择对应的原料为本领域技术人员的公知常识);
(b)采用氩气作为载气将铁基合金原料粉末送入等离子体炬中汽化熔炼,形成合金体;载气的流量0.2m3/h,送料速率为1g/min;所述等离子体炬的功率为5kW,发生气为流量5m3/h的氩气,边气为流量5m3/h的氩气,压力范围为负压100mm汞柱;
(c)用冷却气对合金体进行热交换,形成微细球形铁基合金粉末,所述冷却气流量为1m3/h;
(d)将所述铁基合金粉末导入气固分离室收集固体粉末;
(e)将所述铁基合金粉末与所述碳粉按配方比混合后,研磨均匀即可。
实施例2
本实施例提供一种用于3D打印的金属粉料,它由铁基合金粉末和碳粉按质量比400∶1混合获得,铁基合金粉末的平均粒径为60μm,碳粉的平均粒径为2μm,铁基合金粉末包括以下重量百分含量的成分:0.03%C、0.5%Si、0.1Mn、3%Ti、0.5%Mg、0.15%V、0.15%Cr、0.01%Sr,余量为Fe和不可避免的杂质。
上述用于3D打印的金属粉料的制备方法,它包括以下步骤:
(a)用含C、Si、Mn、Ti、Mg、V、Cr、Sr、Fe元素的原料配成铁基合金原料粉末(根据元素选择对应的原料为本领域技术人员的公知常识);
(b)采用氩气作为载气将铁基合金原料粉末送入等离子体炬中汽化熔炼,形成合金体;载气的流量1m3/h,送料速率为20g/min;所述等离子体炬的功率为15kW,发生气为流量10m3/h的氩气,边气为流量20m3/h的氩气,压力范围为负压150mm汞柱;
(c)用冷却气对合金体进行热交换,形成微细球形铁基合金粉末,所述冷却气流量为15m3/h;
(d)将所述铁基合金粉末导入气固分离室收集固体粉末;
(e)将所述铁基合金粉末与所述碳粉按配方比混合后,研磨均匀即可。
实施例3
本实施例提供一种用于3D打印的金属粉料,它由铁基合金粉末和碳粉按质量比200∶1混合获得,铁基合金粉末的平均粒径为50μm,碳粉的平均粒径为1μm,铁基合金粉末包括以下重量百分含量的成分:0.02%C、0.8%Si、0.1Mn、5%Ti、0.2%Mg、0.15%V、0.1%Cr、0.02%Sr,余量为Fe和不可避免的杂质。
上述用于3D打印的金属粉料的制备方法,它包括以下步骤:
(a)用含C、Si、Mn、Ti、Mg、V、Cr、Sr、Fe元素的原料配成铁基合金原料粉末(根据元素选择对应的原料为本领域技术人员的公知常识);
(b)采用氩气作为载气将铁基合金原料粉末送入等离子体炬中汽化熔炼,形成合金体;载气的流量0.5m3/h,送料速率为15g/min;所述等离子体炬的功率为12kW,发生气为流量8m3/h的氩气,边气为流量15m3/h的氩气,压力范围为负压120mm汞柱;
(c)用冷却气对合金体进行热交换,形成微细球形铁基合金粉末,所述冷却气流量为10m3/h;
(d)将所述铁基合金粉末导入气固分离室收集固体粉末;
(e)将所述铁基合金粉末与所述碳粉按配方比混合后,研磨均匀即可。
实施例4
本实施例提供一种用于3D打印的金属粉料,其制备方法与实施例3中的基本一致,它由铁基合金粉末和碳粉按质量比250∶1混合获得,铁基合金粉末的平均粒径为50μm,碳粉的平均粒径为1μm,不同的是:铁基合金粉末包括以下重量百分含量的成分:0.02%C、0.8%Si、0.2Mn、4%Ti、0.3%Mg、0.18%V、0.12%Cr、0.03%Sr,余量为Fe和不可避免的杂质。
将实施例1至实施例4中制得的用于3D打印的金属粉料进行3D打印形成在基板的表面,具体参考现有技步骤:
(a)采用逐层喷射聚乙烯吡咯烷酮水溶液的粘结剂微液滴,然后逐层叠加金属粉料的3D打印方法获得此金属成型粉料的一种5×5×5mm3立方体结构的三维粘接坯体;
(b)成型后的粘接坯体再进行脱脂烧结,先在600℃以下进行脱脂,然后在真空状态下逐渐升温至1350℃进行烧结,获得3D打印制品。测得3D打印制品的性能列于表1中。
表1 实施例1至实施例4中制得的用于3D打印的金属粉料制得3D打印制品的性能
上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围之内。
Claims (4)
1.一种用于3D打印的金属粉料,其特征在于:它由铁基合金粉末和碳粉按质量比100~400∶1混合获得,所述铁基合金粉末的粒径为20~60μm,所述碳粉的粒径为50nm~2μm,所述铁基合金粉末包括以下重量百分含量的成分:
2.根据权利要求1所述的用于3D打印的金属粉料,其特征在于,所述铁基合金粉末包括以下重量百分含量的成分:
3.权利要求1或2所述用于3D打印的金属粉料的制备方法,其特征在于,它包括以下步骤:
(a)用含C、Si、Mn、Ti、Mg、V、Cr、Sr、Fe元素的原料配成铁基合金原料粉末;
(b)采用氢气或者氩气作为载气将所述铁基合金原料粉末送入等离子体炬中汽化熔炼,形成合金体;所述载气的流量0.2~1m3/h,送料速率为1~20g/min;
(c)用冷却气对所述合金体进行热交换,形成微细球形铁基合金粉末,所述冷却气流量为1~15m3/h;
(d)将所述铁基合金粉末导入气固分离室收集固体粉末;
(e)将所述铁基合金粉末与所述碳粉按配方比混合后,研磨即可。
4.根据权利要求3所述用于3D打印的金属粉料的制备方法,其特征在于:所述等离子体炬的功率为5~15kW,发生气为流量5~10m3/h的氩气,边气为流量5~20m3/h的氩气,压力范围为负压100~150mm汞柱。
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