摘要
在Ni(85)Al(15)粉末中掺杂1%(质量分数)的钨精矿粉末并压制成坯,对压坯进行激光点燃自蔓延烧结。利用XRD、SEM、硬度、磨损以及腐蚀测试等手段对烧结合金进行组织结构及性能表征。结果表明,在烧结过程中,压坯实现了自蔓延烧结。合金组织为α-Ni基体上弥散分布相,物相为NiAl、Ni3Al、WO3以及Al2O3;当功率为1100 W时,烧结合金硬度较大,达到30.7 HRC;合金的单位面积磨损量较小,为0.89×10-3g/mm2;当功率为900 W时,合金的维钝电流密度为1.15 mA/mm2,自腐蚀电位为-400 mV,钝化区间为-600^-1450 mV,在浓度为1 mol/L的H2SO4溶液中腐蚀性较佳。
Ni（85）Al（15） alloy blended with 1% （mass fraction） tungsten concentrate powder was prepared by laser ignition in-duced self-propagating high temperature synthesis. The microstructure and property of the laser sintered alloy were inveastigated by XRD, SEM, hardness test, abrasion test and corrosion test. The experimental results show that in process of the sintering, the self-propagating combustion synthesis of the blank is achieved. The phases, such as NiAl, Ni3Al, WO3 and Al2O3, disperse inα-Ni ma-trix, The hardness of the sintering alloy is the bigger when the laser power is 1100 W, it is 30.7 HRC, however, the relative wear of the sintered alloy is the lower, it is 0.89＆#215;10-3 g/mm2. When the power is 900 W, the alloy passive current density is 1.15 mA/mm2, the corrosion potential is-400 mV, the passivation range is-600^-1450 mV, and it has better corrosion prperty in 1 mol/L H2SO4 solu-tion.
出处
《激光杂志》
CAS
CSCD
北大核心
2014年第2期47-48,共2页
Laser Journal
基金
辽宁省科学事业公益研究基金
辽宁省教育厅科学研究项目。(L2012108)
三束材料改性教育部重点实验室开放课题(DP1051201)
关键词
激光烧结
钨精矿粉
微观组织
腐蚀性
laser sintering
tungsten concentrate powder
microstructure
corrosion property
