Effect of tellurium on machinability of 303Cu free cutting stainless steel
SU Meng-meng1, JI Deng-ping1,2, YAN Dao-cong2, ZHU Qiang-bin1, WANG Yi1, FU Jian-xun1
1. Center for Advanced Solidification Technology (CAST), State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China; 2. Zhejiang Qingshan Iron and Steel Co., Ltd., Lishui 323000, Zhejiang, China
Abstract:In order to further improve the cutting performance of 303Cu free cutting stainless steel and meet the higher cutting performance requirements of high-end customers, industrial test of adding tellurium to 303Cu free cutting stainless steel was carried out, and the free cutting phase analysis of 303Cu tellurium-containing free cutting stainless steel was carried out. Quantitative cutting contrast experiment was carried out with the help of dynamometer, surface roughness meter, etc. The experimental results show that under the condition of 22.14 m/min cutting speed, 0.15 mm cutting depth, 0.20 mm/r feed, the cutting forces of 303Cu stainless steel wire rods with tellurium mass fraction of 0 (excluding tellurium), 0.003 6% and 0.007 0%, respectively, are 61.47, 51.43 and 48.51 N, respectively, and the surface roughness Ra is 10.61、8.86 and 5.91 μm, and the proportion of C-type chips is 36%, 53% and 78% respectively. The addition of tellurium improves the morphology and distribution of sulfide in steel. The sulfide size becomes larger, the length width ratio decreases, and the shape of sulfide is closer to the ellipsoidal shape. It increases the chip breaking property of the material, reduces the built-up edge, and further reduces the cutting force. Moreover, it improves the surface finish and increases the C-type chip ratio. With the increase of tellurium content, the machinability is notable improved.
苏蒙蒙, 季灯平, 严道聪, 朱强斌, 王奕, 付建勋. 碲对303Cu易切削不锈钢切削性能的影响[J]. 中国冶金, 2023, 33(4): 65-72.
SU Meng-meng, JI Deng-ping, YAN Dao-cong, ZHU Qiang-bin, WANG Yi, FU Jian-xun. Effect of tellurium on machinability of 303Cu free cutting stainless steel[J]. China Metallurgy, 2023, 33(4): 65-72.
Beidokhti B,Dolati A,Koukabi A H. Effects of alloying elements and microstructure on the susceptibility of the welded HSLA steel to hydrogen-induced cracking and sulfide stress cracking[J]. Materials Science and Engineering,2009,833:167.
Schmidt R H,Erickson D J, Sims S, et al. Characteristics of food contact surface materials: Stainless steel[J]. Food Protection Trends,2012,32(10):574.
[5]
Pequignet E. Watch with a square and a black dial and a wrist watch in stainless steel:D431194[P]. 2000-09-26.
XIE J B,FAN T,SUN H,et al. Enhancement of impurity,machinability and mechanical properties in Te-treated 0Cr18Ni9 steel[J]. Metals and Materials International,2019,27(6):1416.
[14]
Katoh T,Abeyama S,Kimura A,et al. A study on resulfurized free-machining steel containing a small amount of tellurium[J]. Denki Seiko,1982,53(3):195.
SHEN P,ZHOU L,YANG Q,et al. Modification of MnS inclusion by tellurium in 38MnVS6 micro-alloyed steel[J]. Metallurgical Research and Technology,2020,117(6):615.
[17]
Bellot J,Gantois M. The influence of sulphur and tellurium compounds on the hot deformability and mechanical properties of steels[J]. Transactions of the Iron and Steel Institute of Japan,1978,18(9):536.
Mahmutovic A,Nagode A,Rimac M,et al. Modification of the inclusions in austenitic stainless steel by adding tellurium and zirconium[J]. Materiali in Tehnologije,2017,51(3):523.
[20]
WU X Y,WU L P,XIE J B,et al. Modification of sulfide by Te in Y1Cr13 free-cutting stainless steel[J]. Metallurgical Research and Technology,2020,117(1):3646.
Zheng L,Malfliet A,Wollants P,et al. Effect of surfactant Te on the formation of MnS inclusions in steel[J]. Metallurgical and Materials Transactions B,2017,48(5):2447.
WANG X M,LI C H,ZHANG Y B,et al. Tribology of enhanced turning using biolubricants: A comparative assessment[J]. Tribology International,2022,174:107766.