Production and Characterization of a Modified Hot Work Tool Steel by Laser Powder Bed Fusion

被引：11

作者：

Deirmina, Faraz ^{[1
]}

Davies, Paul A. ^{[1
]}

Dixit, Nikhil ^{[1
]}

Siriki, Raveendra ^{[2
]}

Pellizzari, Massimo ^{[3
]}

机构：

[1] Sandvik Addit Mfg AB, Mossvagen 10, S-81182 Sandviken, Sweden

[2] AB Sandvik Mat Technol, Jarnverksleden 8, S-81134 Sandviken, Sweden

[3] Univ Trento, Dept Ind Engn, Via Sommar 9, I-38123 Trento, Italy

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2022年 / 53卷 / 07期

关键词：

AISI H13; MECHANICAL-PROPERTIES; FATIGUE BEHAVIOR; MICROSTRUCTURE; PREDICTION;

D O I：

10.1007/s11661-022-06694-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Conventional hot work tool steels with medium carbon content, fabricated by laser powder bed fusion (L-PBF), are susceptible to cracking. To reduce this risk, as in well-established welding process, usually preheating or in-situ heating needs to be applied. In order to address this issue, a modified grade, with lower carbon wt pct, is proposed to fabricate parts showing less susceptibility to cracking. The microstructure was studied in the as-built condition and after direct double tempering for 2 hours each at 625 degrees C and 650 degrees C. Tensile properties and hardness were compared with those of wrought and (L-PBF) processed AISI H13. The results confirm improved printing performance of the new steel grade and the possibility of achieving similar hardness and strength by proper tempering treatment.

引用

页码：2642 / 2651

页数：10

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