Plasma Surface Alloying Process of a Fe-W-Mo-Co Surface Age Hardening High Speed Steel

2007 ◽  
Vol 353-358 ◽  
pp. 1741-1744 ◽  
Author(s):  
Zhong Hou Li ◽  
Nai Juan Ren ◽  
Yan Mei Zhang
Keyword(s):  
Diffusion Layer ◽  
High Speed ◽  
High Speed Steel ◽  
Processing Parameters ◽  
Age Hardening ◽  
Surface Alloying ◽  
Plasma Surface ◽  
The Matrix ◽  
Glow Plasma ◽  
Plasma Surface Alloying

The surface age alloy of Fe-Co-W-Mo was formed on 25Cr2Mo2V steel by double glow plasma surface alloying technique. The effects of processing parameters on the depth, composition and constituent phases of surface alloying layer were investigated. Results indicate that the plasma processing parameters influenced significantly the surface alloying process. The composition of the surface layer nears W11Mo7Co23Fe59wt%, the depth of the surface alloying layer is 150μm after processing at 1100°C for 6hr. The microstructure of the cross section was composed of three sub-layers, that is, the deposition layer, the diffusion layer and the matrix. The constituent phases of the deposition layer were Fe7W6 type μ phase Fe2W type laves phase, Fe3Mo and a little amount of M2C type carbide, that of the diffusion layer were α-Fe and some intermetallics.

Plasma Surface Alloying W-Mo Low-Alloy HSS

2005 ◽  
Vol 475-479 ◽  
pp. 3955-3958
Author(s):  
Jin Yong Xu ◽  
Yan Ping Liu ◽  
Yuan Gao ◽  
Zhong Xu
Keyword(s):  
High Speed ◽  
Surface Hardness ◽  
High Speed Steel ◽  
Alloying Elements ◽  
Work Piece ◽  
Test Results ◽  
Surface Alloying ◽  
Plasma Surface ◽  
The Common ◽  
Plasma Surface Alloying

The plasma surface alloying low-alloy high speed steel (HSS) is carried out in vacuum chamber where a source electrode (W-Mo) and a work piece are properly placed. By using the sputter of glow-discharge, under the common function of electric field and temperature field, ?????? the desired alloying elements (W- Mo) are sputtered from the source cathode, traveling toward the substrate. Subsequently the alloying elements deposit onto the surface of the substrate, forming alloy diffusion layer which the depth may vary from several micron to several hundreds micron. In the end a surface low-alloy HSS steel would be produced after ultra-saturation ion carbonization. The composition of the alloyed layer is equal or similar with it of low-alloy HSS. The carbonized layer, without coarse eutectic ledeburite structure, possesses high density of finely and dispersed alloy carbides with tungsten equivalent 10% above and a significant improvement in surface hardness and wear resistance. The principle of plasma surface alloying and its test results and commercial products application are introduced in this paper.

Study of High Co Superhard High Speed Steel Surface

2009 ◽  
Vol 610-613 ◽  
pp. 253-256
Author(s):  
Zhong Hou Li ◽  
Sha Sha Liu ◽  
Zhi Yong Cheng
Keyword(s):  
Surface Layer ◽  
High Speed ◽  
Steel Surface ◽  
High Surface ◽  
Surface Hardness ◽  
High Speed Steel ◽  
Low Alloy Steel ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Plasma Surface Alloying

Cobalt- superhard high speed steel layer has been formed on the surface of low alloy steel 20Cr2V by tungsten-molybdenum-cobalt plasma surface alloying and following plasma carbonizing. After plasma surface alloying, a homogeneous and dense surface alloying layer was formed, thickness of which is 200μm. Composition, microstructure and properties of the alloying layer were investigated. Contents of W, Mo, Co, Cr, V and C in the surface layer reach 8%,5%, 6% ,4%,1.5% and 1.5% or so respectively. The concentrations of alloy elements basically meet the requirements of high cobalt type superhard high speed steel. Constituent phases of the surface layer were martensite, M7C3 ,M2C and Cr3C2 carbides and μ phase after quenching treatment. The advanced gradient superhard high speed steel possesses not only high surface hardness, high anti-temper softening ability but also enough toughness.

A New Low Alloy High Speed Power Hack Saw Blades

2005 ◽  
Vol 475-479 ◽  
pp. 3939-3942
Author(s):  
Yuan Gao ◽  
Jin Yong Xu ◽  
Yan Ping Liu ◽  
Zhi Yong He ◽  
Zhong Xu
Keyword(s):  
High Speed ◽  
Bulk Material ◽  
Low Cost ◽  
High Speed Steel ◽  
Low Alloy Steel ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Solid Diffusion ◽  
Primary Carbides ◽  
Plasma Surface Alloying

Plasma surface alloying for low alloy high speed power hack saw blades was introduced.The bulk material of the blade is made of low alloy steel, while the teeth of which possess a composition of high speed steel like as a result of surface modification by a plasma surface alloying process.It is a solid diffusion process eliminating method avoids the formation of coarse primary carbides which is a major problem encountered in the production of smelting high speed steel. As a result the carbides in the layer of high speed steel are fine and well-distributed.Therefore,it has not only well wear-resistance but also toughness. Besides, the blade also has the advantages of ease manufacturing and low cost.

Study on Titanized Layer Microstructure of T10 Steel by Double Glow Plasma Surface Alloying Technique

2016 ◽  
Vol 861 ◽  
pp. 171-176
Author(s):  
Xiao Lu Hong ◽  
Chong Liang Cui ◽  
Ting Fu Sun ◽  
Xi Cheng Wei ◽  
Cheng Chang Ji
Keyword(s):  
Activation Energy ◽  
Sample Surface ◽  
Diffusion Activation Energy ◽  
Surface Alloying ◽  
Plasma Surface ◽  
The Matrix ◽  
Glow Plasma ◽  
Plasma Surface Alloying Technique ◽  
Plasma Surface Alloying ◽  
Diffusion Activation

The titanized layer was prepared on the surface of T10 steel using a double glow plasma surface alloying (DGPSA) technique. The titanized layer was characterized by SEM and scratch tester. Results showed that the TiC layer with a thickness of 1.5~8.5μm was formed on the sample surface at the range of 900°C to 1100°C for the holding time from 2h to 6h, which was homogeneous, dense, and metallurgically combined with the substrate. The Ti concentration gradually decreased from surface to the matrix. The diffusion activation energy of Ti during double glow plasma titanizing was also estimated.

Microstructure and corrosion resistance of pure titanium surface modified by double-glow plasma surface alloying

2013 ◽  
Vol 49 ◽  
pp. 1042-1047 ◽  
Author(s):  
Qiong Wang ◽  
Ping-Ze Zhang ◽  
Dong-Bo Wei ◽  
Ruo-Nan Wang ◽  
Xiao-Hu Chen ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Titanium Surface ◽  
Pure Titanium ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Glow Plasma ◽  
Surface Modified ◽  
Plasma Surface Alloying

A study on tribological behavior of double-glow plasma surface alloying W-Mo coating on gear steel

2015 ◽  
Vol 278 ◽  
pp. 92-98 ◽  
Author(s):  
Zhong-Kai Qiu ◽  
Ping-Ze Zhang ◽  
Dong-Bo Wei ◽  
Xiang-Fei Wei ◽  
Xiao-Hu Chen
Keyword(s):  
Tribological Behavior ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Gear Steel ◽  
Glow Plasma ◽  
Plasma Surface Alloying

A study on double glow plasma surface metallurgy Mo–Cr high speed steel of carbon steel

2007 ◽  
Vol 201 (9-11) ◽  
pp. 5093-5096 ◽  
Author(s):  
Jinyong Xu ◽  
Yanping Liu ◽  
Jianzhong Wang ◽  
Xiaoyun Kui ◽  
Yuan Gao ◽  
...  
Keyword(s):  
Carbon Steel ◽  
High Speed ◽  
High Speed Steel ◽  
Plasma Surface ◽  
Glow Plasma

DOUBLE GLOW PLASMA SURFACE ALLOYING ANTIBACTERIAL SILVER COATING ON PURE TITANIUM

2014 ◽  
Vol 21 (03) ◽  
pp. 1450032 ◽  
Author(s):  
NAIMING LIN ◽  
JUNWEN GUO ◽  
RUIQIANG HANG ◽  
JIAOJUAN ZOU ◽  
BIN TANG
Keyword(s):  
Bacterial Adhesion ◽  
Antibacterial Property ◽  
Pure Titanium ◽  
Silver Coating ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Commercial Pure Titanium ◽  
Titanium Dental Implant ◽  
Glow Plasma ◽  
Plasma Surface Alloying

In order to endow the commercial pure titanium dental implant material with antibacterial property and aimed at avoiding the invalidation that is caused by bacterial adhesion on the surface, a silver coating was fabricated via double glow plasma surface alloying. The antibacterial property of the silver coating was assessed via in vitro estimation. The results showed that a continuous and compact coating was formed. The silver coating had absolute superiority in antibacterial property to raw commercial pure titanium. Double glow plasma surface alloying with silver on commercial pure titanium dental implant material could be considered as a potentially effective method for preventing bacterial adhesion.

Sign in / Sign up

Export Citation Format

Share Document