Surface hardening of AISI 420 stainless steel by using a nanosecond pulse laser

Conference proceedings article

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Netprasert O., Tangwarodomnukun V., Dumkum C.

ผู้เผยแพร่: Trans Tech Publications

ปีที่เผยแพร่ (ค.ศ.): 2018

Volume number: 911 MSF

หน้าแรก: 44

หน้าสุดท้าย: 48

จำนวนหน้า: 5

ISBN: 9783035712032

นอก: 0255-5476

eISSN: 1662-9752

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042511711&doi=10.4028%2fwww.scientific.net%2fMSF.911.44&partnerID=40&md5=83a714b4daca106366425885e06c06f2

ภาษา: English-Great Britain (EN-GB)

ดูบนเว็บไซต์ของสำนักพิมพ์

บทคัดย่อ

Unlike the conventional heat treatments, laser hardening process can selectively and locally harden the workpiece surface with minimum part distortion, thus making the process suitable for small or thin workpieces. To elucidate a better understanding of process performance, this paper presents an investigation of laser hardening process for AISI 420 martensitic stainless steel. A nanosecond pulse laser was used as a heat source to harden the metal surface. The effects of laser power scan overlap and scan speed on micro-hardness and case depth were experimentally examined. The results revealed that the micro-hardness of stainless steel surface increased from 242 HV to 1700 HV without any sign of surface melting. The depth of hardened layer was found to be 60-80 ตm depending on laser power, scan speed and scan overlap applied. In addition, the scan overlap of 50% was recommended to lessen the deviation of micro-hardness across the laser-scanned area. ฉ 2018 Trans Tech Publications, Switzerland.

คำสำคัญ

Hardening