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The research on milling force of die steel and other high hardness materials milling in cut-in process are less, and mainly focus on a single cut-in angle in studying milling force under different cut-in manners, which leads that the choosing of cut-in manner can only rely on experience, milling force increases rapidly in cut-in process, tool internal micro-cracks can be asily generated, and even causes the early damage and affects tool life.
Cemented carbideis selected as the cutting tool material, and AISI-D2 as the workpiece material which is from DEFORM-3D material database and matches actual die material Cr12MoV.
Acknowledge This research is supported by National Natural Science Foundation of China (Project approval number:51235003).
Journal of Harbin University of Science and Technology.
A.Young and K.Ma:.International Journal of Machine Tools &Manufacture.

Analyses of nugget and expulsion formation process during resistance spot welding between aluminum alloy and steel Nannan Wang a, Ranfeng Qiub , Fangfang Liuc , Man Zhang and Qingqing Xuan School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471003, China ahnlywnn@163.com, bqiurf1221@163.com, c498074270@qq,com Keywords: Expulsion, Nugget formation, Resistance spot welding Abstract.
Introduction The need for joints between dissimilar materials often arises in automotive industries, because sound joints between dissimilar materials enable multi material design methodologies and low cost fabrication process to be employed.
From the point of view of material supply, aluminum alloy and steel are the most important construction materials for automotive structures; therefore, the availability of a sound joining technique between aluminum alloy and steel is indispensable.
[2] Farida Bouafia, Boualem Serier, Benali Boutabout, et al, Numerical analysis of the effect of pore on local stresses in spot welds, Computational Materials Science. 50(2011) 2517-2529
Zhang, Expulsion and its influence on weld quality, Welding Journal. 78 (1999) 373s-380s

Filice: Journal of Materials Processing Technology Vol. 191(2007), p. 390-395 [2] M.
Cao: Journal of Manufacturing Science and Engineering Vol. 132(2010), p. 061003-1-10 [3] H.
Liu, Jaegwan Kang: Advanced Materials Research Vol. 201-203(2011), p. 99-102
Fu: Chinese Journal of Lasers Vol. 36(2009), p. 3313-3317, in Chinese
Liu: Journal of Jinggangshan University (Natural Science) Vol. 31(2010), p. 87-90, in Chinese.

There are three main aspects, including the contents of reactive materials, coating layer thickness and laser parameters.
Among them, the most significant parameters are the contents of reactive materials and laser power.
From Eq.1, carbon and tungsten are the reactive materials, therefore, we only consider their contents.
Wang: Journal of Shandong University (Engineering Science), Vol 38.No 2.6-9(2008).In Chinese [5]L.
Wang: Chinese Journal of Lasers, Vol 35.No 10.1632-1635(2008).

The accuracy of design and manufacture is the key of model test.For a arch ridge with curved beam and skewed arch, the model test based on the similarity theory is analysized in detail including selecting materials, designing the size of section and calculating the geometrical parameters and so on, and the simulation reults between model and prototype are evaluated.Meanwhile some key technologies and valuable matters for design of aerodynamic model are presented,which provides an important reference value for model design of bridge structures.
Acknowledgements This research is supported by the Natural Science Foundation of Hebei Province(Grant No.
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Ko.Journal of Wind Engineering and Industrial Aerodynamics.Vol. 85 (2000),p. 97-117.
Kareem.Journal of Engineering Mechanics,ASCE.Vol.126 (2000), p. 17-26.

Materials and Method 2.1 Experimental Design AISI 310 stainless steel was selected as work piece material in AGMAW process, as it is widely used in applications involving high temperature and severe conditions.
Gandhinathan, Process parameters for metal inert gas welding of mild steel by using Taguchi technique – A review, International journal of material sciences and technology, Research india publications, 10, (2020), 1-14
Dasharath, Modelling and optimization of electron beam welding process using ANOVA, International symposium of research students on material science and engineering, 20, (2004), 1-11
Ashrafizadeh, Micro structural evolutions in dissimilar welds between AISI 310 austenitic stainless steel and Inconel 657, Journal of materials science, 45, 2564– 2573
Fathy, Effect of welding processes on mechanical and microstructural characteristics of DP780 steel welded joints for the automotive industry, Key engineering materials, 835, (2020), 101-107

The morphology of the hydrochars changed with reaction time increased, the surface of the materials contained a large number of functional groups, showed higher adsorption capacity for Cr(VI) than activated carbon and the removal rates of Cr(VI) were 67% and 29% respectively(pH=1, 20℃).
Physical properties of hydrochar materials Reaction time(h) Yield[%]a pH N（%） C（%） H（%） 0 / / 0.14 44.24 5.79 3 0.53 4.00 0.2 47.90 6.07 6 0.3 3.73 0.74 48.92 5.84 8 0.3 3.66 0.86 51.94 5.76 10 0.32 3.72 0.88 52.10 5.35 14 0.39 3.80 0.91 54.11 5.44 18 0.41 3.68 0.68 52.40 5.83 22 0.45 3.68 0.56 55.30 6.07 26 0.44 3.64 1.10 56.71 5.50 28 0.37 3.66 1.11 56.50 5.62 32 0.38 3.64 0.89 56.62 5.74 38 0.38 3.6 0.93 56.43 5.70 40 0.38 3.67 1.13 56.97 5.56 44 0.38 3.65 0.94 56.96 5.89 a Yield expressed as (g product/100 g raw material).
Acknowledgements This work was financially supported by National Natural Science Foundation of China (No.21166014) References [1] S.
Wan, H.Amirhossein et al., A review on surface modification of activated carbon for carbon dioxide adsorption, Journal of Analytical and Applied Pyrolysis,89, 143–151.(2010) [3] M.
Prakash, Removal of Cr(VI) from aqueous solutions using agricultural waste ‘maize bran’, Journal of Hazardous Materials,152 ,356–365.(2008)

However polyamide 6 is highly hygroscopic and the mechanical properties of materials are reported to be degraded by water absorption.
However polyamide 6 is highly hygroscopic and the mechanical properties of materials are reported to be degraded by water absorption[2].
Experimental procedure Materials and molding method.
Beckwith: Thermoplastic composites resins matrices, Sampe Journal, Vol. 44, No.1 (2008), p. 70-71
Enoki: Effect of Water Absorption on the Mechanical Properties of Carbon Fiber/Polyamide composites, Journal of Solid Mechanics and Materials Engineering, Vol. 7, No.5 (2013), p. 520-529

Effect of Surface Modification on Slip Casting of SiC Slurry Caihua Zheng 1,a , Xiaoli Ji 2,b 1Mechanical and Electronic Engineering Department,Qing Quan Polytechnic, Qingyuan Guangdong 511510,China 2Key Laboratory for Silicate Materials Science and Engineering of Ministry Education,Wuhan University of Technology, Wuhan 430070, China azhengch1999@sohu.com, bjxl@whut.edu.cn Keywords: surface modification, SiC, rheology, slip casting Abstract.
Acknowledgement The authors are grateful for the financial support from the Science and Technology Project of Qing Quan Polytechnic.
Kovac,G.Drazic,et al,Surface Characterisation and Modification of Submicron and Nanosized Silicon Carbide Powders,Journal of the European Ceramic Society,Vol.27(2007),p. 3545–3550 [2] Wei Li,Ping Chen,Mingyuan Gu,Yanping Jin,Effect of TMAH on rheological behavior of SiC aqueous suspension,Journal of the European Ceramic Society,Vol.24(2004), p.3679–3684 [3] Qide Wu,Caihua Zheng,Xiaoli Ji,et al, Impacts of Defoaming Agents on a Modified SiC Slurry Slip Casting Process Performance,Journal of Wuhan University of Technology,Vol.30, No.2(2008),p.21-24 [4] Huagui Yang,Chunzhong Li,Hongchen Gu,and Tunan Fang.
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