Comparison Of Punch Life Of Powder High Speed Tool Steel And High Speed .
Design & Manufacturing, 16 1 , 2022 Design & Manufacturing, Vol.16 No.01, 2022 ISSN 2092-9692 1 1 Comparison of punch life of powder high speed tool steel and high speed tool steel Woo-Ram Lee1 Chun-Kyu Lee 1 HKC Department of Metal Mold & Die Engineering, Kongju National University (Received February 15, 2022 / Revised March 29, 2022 / Accepted March 31, 2022) Abstract: A lot of research is being done on metal materials to improve the lifespan of molded parts. As a result, excellent mold materials have been developed that withstand high hardness at high temperatures and frictional heat generated from high-speed cutting. In this study, the press mold life of powder high-speed tool steel and general high-speed tool steel was compared. Powdered high-speed steel is composed of alloying elements such as tungsten, maldividene, cobalt, chromium, and vanadium in steel, which improves wear resistance compared to high-hardness and high-speed tool steels. The mold parts of both steel types were manufactured in the same way from heat treatment to machining, and the powder high-speed tool steel was 66HRC and the high-speed tool steel was 61HRC. As a result of the experiment, it was observed that the number of punching of powder high-speed tool steel was improved by 40-50%, and powder high-speed tool steel had fewer impurities, uniform texture, and excellent surface structure. It has a microscopic structure. Key Words: High Speed Steel, Improving the life of the press die, Powder high-speed steel, Powder Metallurgy . , , , . , , . . (Co), , (W), (V) (Cr), , . , (Mo), . , 1) 1. . Hong : E-mail: ckt1230@kongju.ac.kr - 1 - -9- Co
2) . LEE 3) . Co . . . Fig. 1 ROBOFIL440 , Fig. 2 SFG-5225 . Fig. 3 160 C60E-MOD , PRESS 1.8mm, 83.7(Hrb) (SEM) , 64mm . . Table 1 . SPM 1000 130 Raw Materials SPM Cutting Oil C60E-MOD (CABON STEEL) 130 LUVIDRAWB 1000 LUVID- RAWB . Mo SKH51 , , (HAP40) . Table 2 , C 3.7 4.2 %, W 4.60 5.4 % ,V 1.27 13.37 %, Cr 5.6 6.4 %, Mo 2.8 3.3 % Co - 2 - - 10 - 7.5 8.5 %
SKH51, 4,5) . Fig. 4 (HAP40) Fig. 5 (SKH51) (HAP40) . 4 (SEM) . 4 200*150*97 . Grade YA M1 JIS SKH 51 C 0.8 0.9 Cr 3.8 4.5 W 6.0 7.0 Mo 4.8 5.8 V 1.8 2.3 Co HAP 40 SKH 40 1.27 1.37 3.7 4.7 5.6 6.4 4.6 5.4 2.8 3.3 7.5 8.5 1 500 C 10 490 C 4 . C - . , 860 C 1 20 20 , 1200 , , 550 C 3 HRC HRC 66 , 15 , 62 . 4 Fig. 6 W-EDM 1 . W-EDM 3 1 (Polishing) , 2 . Alcrona Coating . SKH51,HAP40) 4 0.1mm 1mm . Table 3 C 0.59, Si 0.2, Mn 0.38, P 0.01, S 0.002, Cr 0.14, Ni . 0.01 - 3 - - 11 - Material C Si Mn P S Cr Ni C60EMOD 0.59 0.20 0.38 0.01 0.002 0.14 0.01
Fig. 7 10 (200x) . 8 . (HAP40) Fig. 9 A Type 10 17 , B Type 14 22 , C Type 16 , D Type 34 , A Type 18 23 , B Type 27 38 , C Type 27 38 , D Type 45 56 . 21 , 8 A Type 7 , B Type 14 , C Type 16.5 , D Type 16.5 16.5 , . , Fig. 10 (Chipping) . Fig. 11 Fig. 12 . . - 4 - - 12 -
3) , 45 % . , . . , 1) S-H HONG, “Life and Mechanical Properties of Hot Former Die for Bearing Race using P/M High Speed Steel”, Department of Powder Materials Research, Korea Institute of Materials Science, Korea Institute of Machinery and Mater., 531 Changwondaero, Changwon, Gyeongnam, 641-831, Korea, pp. 367-371, 2007. 2) H HONG, “Fabrication and Mechanical Properties of Powder Metallurgical High Speed Steels with Various Co Contents”, Materials Technology Dept., Korea Institute of Machinery and Materials, 66 Sangnam-dong, Changwon, Kyungnam 641-831, Korea, pp. 303-306, 2002. 3) H-Y LEE, “The Effect of Heat treating Conditions on Wear Characteristics of High Speed Steel by Powder Metallurgy”, Korean Tribology Society, pp. 135-140, 2001. 4) H-Y LEE, “The Effects of Cobalt on Wear and Friction Characteristics of High Speed Steel by Powder Metallurgy”, Department of Mater., Eng., keimyung niversity, Daegu, Korea, pp. 156-163, 1999. 5) S-H HONG, “Failure analysis of powder compacting punches made of powder metallurgy high speed steels”, Korea Institute of Machinery and Mater.,66 Sangnam-dong, Changwon, Kyungnam 641-010, Korea,, pp. 78-84, 2000. 6) http://www.hmk.hitachi-metals.com 7) http://www.millroll.com 8) http://meisterlab.co.kr/ 4 (SEM) . 1) (HAP40) (SKH51) . 20 2) . - 5 - - 13 -
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high-speed tool steels. The mold parts of both steel types were manufactured in the same way from heat treatment to machining, and the powder high-speed tool steel was 66HRC and the high-speed tool steel was 61HRC. As a result of the experiment, it was observed that the number of punching of powder high-speed tool steel was improved by 40-50%,
(1) ATC 15 Amp Fuse (Punch 100) (1) ATC 20 Amp Fuse (Punch 150) (1) ATC 30 Amp Fuse (Punch 250) (1) ATC 40 Amp Fuse (Punch 360) (1) AGU 50 Amp Fuse (Punch 500) Note: Refer to the Specification section of this manual for recommended Punch 800 fuse size.
Customer will review the completed punch list items and provide sign off. Creating a Punch List Punch List Ack nowledgement by Customer. Punch List Resolution Creating a Punch List 1. Within the project, navigate to the Punch List form. 2. Click on the New button. 3. Fill out the following fields: a. Subject b. Site (select from list, if .
Die holder design (a) Design flow for lower die set Punch design Punch plate design Backing plate design Punch holder design (b) design flow for upper die set Diagram 5. Design flow of punch & blanking die sets When punch holder, guide bushing, guide post and die holder are placed in one unit, we call this as “Die set”. When put together, this is called dies with die set. 1.2 Design flow .
done by arranging Zig/Fixture in the punch machine by multi punch or single punch. After punching/drilling inspection section check it.If any wrong punch done, then the holes are filled by filling punch bit (small MS pieces of round shapes ) and weld it on it, then grind the
Punch edge of card front using edge punch. Begin by selecting a measurement line on the edge punch, and align one end of the card with that line. Punch the length of the card, aligning the punched paper over the design on the tool as you go. Then go back and punch the remainder of the edg
Sep 07, 2019 · The Punch Card A sheet containing three blank punch cards is included at the end of this guide. Print that page to get three blank punch cards. It’s the standard MVOC punch card and has some fields like vehicle info that won’t be used. Fill out both parts of the punch ca
If, after reading your manual, you still have questions regarding this product, we rec-ommend that you see your Rockford Fosgate dealer. If you need further assistance, . ATC 15 Amp Fuse (Punch 100 & Punch 120) (1) ATC 20 Amp Fuse (Punch 160) (1) ATC 30 Amp Fuse (Punch 250)
2 Click Quick Actions, and then click Add Missing Punch. 3 Click the field with the missing punch, which is indicated by solid red. Note: You can click multiple missing punch fields if necessary. 4 To turn off the Missing Punch action, click Add Missing Punch. 5 Click Save.
