CAJ | 학술논문

为了扩大不锈钢的应用范围与节省较昂贵的镍资源,笔者以粒径<38.5μm含氮不锈钢粉末和多组元粘结剂(PW,HDPE,SA)为原料,采用粉末注射成形工艺制备了0Cr17Mn12Mo2N含氮无镍奥氏体不锈钢材料,并对其表面状态与显微组织、拉伸断口形貌以及力学性能、耐蚀性能进行了分析与测试.结果表明:使用上述粘结剂能够成功地实现含氮不锈钢粉末的注射成形;在流动N2气氛中,0.1MPa,1340℃下烧结120min,再经热处理后,注射成形0Cr17Mn12Mo2N不锈钢烧结体的相对密度可达到97.6%,含氮量达到0.83%(质量分数).该含氮无镍不锈钢具有良好的强度和塑性:抗拉强度σ_b=910MPa,屈服强度σ_(0.2)=560MPa,伸长率δ_5=46%,断面收缩率Ф=39.5%,硬度(HRB)为91.7,各项性能指标均优异于MIM 316L不锈钢.
위료확대불수강적응용범위여절성교앙귀적얼자원,필자이립경<38.5μm함담불수강분말화다조원점결제(PW,HDPE,SA)위원료,채용분말주사성형공예제비료0Cr17Mn12Mo2N함담무얼오씨체불수강재료,병대기표면상태여현미조직、랍신단구형모이급역학성능、내식성능진행료분석여측시.결과표명:사용상술점결제능구성공지실현함담불수강분말적주사성형;재류동N2기분중,0.1MPa,1340℃하소결120min,재경열처리후,주사성형0Cr17Mn12Mo2N불수강소결체적상대밀도가체도97.6%,함담량체도0.83%(질량분수).해함담무얼불수강구유량호적강도화소성:항랍강도σ_b=910MPa,굴복강도σ_(0.2)=560MPa,신장솔δ_5=46%,단면수축솔Ф=39.5%,경도(HRB)위91.7,각항성능지표균우이우MIM 316L불수강.
In order to enlarge the application scope of stainless steel and economize costly nickel resource, with nitrogen-containing stainless steel powder and binders PW, HDPE, SA as the raw materials, 0Cr17Mn12Mo2N alloyed steel were produced. Micro structure characteristic and fracture morphology of specimens sintered at various temperatures were investigated by OM and SEM, respectively. And mechanical properties of sintered specimens were determined by tensile test. When the specimens are sintered at 1 340℃ for 120 minutes in flowing N_2(0.1 Mpa) , the results show that the alloyed steel exhibits better property indexes than MIM 316L austenitic stainless steel. A favorable combination of the relative density of 97. 6% and the nitrogen content of 0. 83wt% can be obtained. After solution annealing, the yield strength σ_(0.2), ultimate tensile strength σ_b, elongation δ,, reduction of area Φ and hardness can reach 560 Mpa, 910 Mpa, 46% , 39. 5% and 91. 7 (HRB) , respectively.