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Study on Cutting Process of Manual SHS Cutting Technology Yongsheng Wu1, a, Jianjiang Wang1, b, Wentong Xin1, c, Zhizun Li1, d and Lifeng Qu1, e 1 Ordnance Engineering College, Shijiazhuang, China awuysh.2007@163.com, bJJWang63@heinfo.net, cxwtsjz@163.com, djxxylzz@163.com, elifeng_qu@163.com, Keywords: Manual SHS Cutting Technology; Cutting Pen; Cutting Process Abstract.
Cutting process of manual self-propagating high-temperature synthesis (SHS) cutting technology was studied based on industrial Q235 steel specimen and cut material of cutting pen.
The way to improve efficiency of manual SHS cutting technology is proposed at the end.
The metallographic microstructure is showed after the sample of setting, grinding, polishing and chemical reagent etching. 4% nitric acid alcohol solution is used for Q235 in this paper.
In summary, a base metal is cut using a cutting pen in manual SHS cutting technology.

The processes of arc heating reaction, rather than the rapid SHS reaction, led to magnesium powder reacting with oxygen firstly and giving the product MgO.
Fig.2 showed the microstructure of the aluminothermic reduction reaction products which were after pickling and grinding.
Fig. 3 showed the microstructure of magnesium thermal reaction of the reduction product which were after pickling and grinding.
Acid Leaching of SHS Produced MgO/TiB2 [D].
Acid Leaching of SHS Produced M agnesium Oxide/Titanium Diboride [J].

Strength of SHS Aluminium Cast Iron from Dispersed Mechanical Engineering Waste L.R.
Experimental Procedures The SHS process was carried out in the graphite form.
In this work the task was set at the investigating the mechanical properties of SHS aluminium cast iron to determine the effect on the strength of the factors characterizing the composition of the burden of the SHS process.
The microstructure of SHS aluminium cast iron, (etching, ×500) Fig. 2 shows the characteristic microstructure of the resulting SHS aluminium cast iron.
The presence of copper in cast iron also contributes to the increase in tensile strength due to the reduction in the length of graphite inclusions and the grinding of the spherical shape of graphite inclusions due to their growth inhibition.

Experiment First, the reactants CrO3, Ti, SrO, and TiO2 were put into stainless steel tanks o grinding to 70 μm, then the powder were mixed[6-8] at a certain molar ratio of 2:3:4:1 after sieving.
SHS and densifying process was shown in Figure 1.
The development of SHS process and its application prospect in metallurgicat industry.
Microstructure, properties, and mechanisms of TiC-Mo-Ni cermets produced by SHS.
Inter J SHS Vol.4,1 (1995), p. 43 [11] Dunmed S D, Munir Z A.

Study on a Cu-Fe Weld Metal of Manual SHS Welding Wentong Xin1, a, Zhizun Li1, b, Yongsheng Wu1, c, and Lifeng Qu1, d Ordnance Engineering College, Shijiazhuang, China axwtsjz@sina.com, bjxxylzz@163.com, cwuysh.2007@163.com, dlifeng_qu@163.com Keywords: Manual SHS Welding; Liquid Phase Separation; Microstructure; Properties Abstract.
The paper presents a Fe-base manual SHS Welding material with CuO+Al and Fe2O3+Al being the thermit and adding ferroalloy materials for solving the problem of low mechanical properties of the manual SHS Welding joint.
Introduction Manual SHS welding[1] is a new emergency welding technology characterized no power supply, gas source or other equipments, portability and operating easily and with combustion welding rod (also known as self-propagating welding rod) of welding material and with similar operation of manual arc welding technique.
As shown in Figure 1, one-side welding and both side shaping of weld with an excellent appearance is developed, and manual SHS welding joint of Fe-base weld is obtained.
The metallographic microstructure is showed after the sample of setting, grinding, polishing and chemical reagent etching. 4% nitric acid alcohol solution is used for Q235 in this paper.

Steel substrate was coated by Fe-Al2O3 composite using self-propagating high-temperature synthesis (SHS) reaction of reactant coating paste.
The SHS reaction of the coated green composite was ignited by oxy-acethylene flame.
By combining SHS method with coating process, it is possible to coat higher melting temperature material on the substrate with the heat to ignite the SHS reaction from oxy-acetylene of flame.
The preparing process of slurry precursor for the green composite coatings was as follows: Fe2O3 and Al powders were blended by grinding machine for 24 hrs., then the compounded powders were mixed again with polyvinyl alcohol solution by grinding machine for 24 hrs to get the slurry precursor.
The adiabatic temperature of the SHS process can be calculated from the enthalpy of reaction.

In order to proved the feasibility and studied characteristic of the SHS reactions are display as three chemical equations as followed: 2FeWO4 + 7.333Al + B2O3 → 2Fe + 2WB + 3.667Al2O3 (1) FeWO4 + 2.667Al + C → 2Fe + 2WC + 1.333Al2O3 (2) 5FeWO4 + 15.333Al + B2O3 + C → 5Fe + W2B + WC + 7.667Al2O3 (3) The raw powders were weighted according to the reactions and dry mixed by grinding machine for 2 hrs.
The reaction propagated completely and formed the SHS-product.
XRD pattern of SHS-product (a) Eq. 1, (b) Eq. 2 and (c) Eq. 3.
SEM image of SHS-product (a) Eq. 1, (b) Eq. 2 and (c) Eq. 3.
EDS patterns of SHS-product (a) Eq. 1, (b) Eq. 2 and (c) Eq. 3.

Results of experiments and discussion To determine the structure and properties of the synthesized material, disc-shaped samples with a diameter of 23 mm and a height of 13 mm were made by grinding.
Fig. 3 shows the diffraction pattern of the SHS-compacted material.
Dependence of deformation of SHS-compacted samples from the load applied for various excess of Si content in SHS charge Table 1.
Results of compression test of SHS-compacted samples for various excess of Si content in SHS charge Excess of Si content in SHS charge Maximum load, кN Compression strength, МPа Deformation, % 20%Si 309 ≥987 ≥19 25%Si 309 ≥757 ≥16 Because of the structural and phase heterogeneity over the body of the samples, the top layer of material with a thickness of 5 mm was removed by grinding, that provided access to the study of the internal part of the samples.
Two samples of SHS-compacted material were investigated.

The dense materials were made by reactive pressureless sintering or hot-pressing of the SHS derived powders.
The products of the SHS synthesis were composed mostly of γalon and in lesser extend of aluminium nitride.
Aluminium oxynitride powders prepared via SHS synthesis are usually strongly agglomerated and required intensive grounding before densification.
The powders were mixed for 2 h in propanol using ball mill and zirconia grinding media.
The synthesized powders were crushed and then ground in dry iso-propyl alcohol for 8h using rotary-vibratory mill and silicon nitride grinding media.

In this work, Strontium Titanate samples were synthsized by self-propagating high-temperature synthesis (SHS).
In the first, the diameters of raw materials required by the reactions need to be grinding below 70μm in the stainless steel agate jar, following on, powder would be mixed of CrO3, Ti, SrO and TiO2 by mole ratio 2:3:4:1 once sifted.
Strontium titanate solidified body would be made performance testing after slicing, grinding, polishing.
Consolidation of Radioactives Waste into Mineral-like Material by the SHS Method.
SHS Vol. 7,1(1998), p. 129-135 [8] Barinova T V, Borovinskaya I P, Ratnikov V I, et al.