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MATERIAL TESTING EQUIPMENTS

Microvickers Hardness Tester (Model FMV-1)

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Suitable for thin components, finished components etc.
Load : 10 grams to 1000 grams
Load Accuracy : +/- 1%
Magnification : 125X, 250X, 625X,
Max. Test height X through --115 X 70mm
X-Y stage provided with least count of 0.01mm

Specifications

Sr. No.	Specifications
1 .	Maximum Test Height	115 mm
2.	Throat of Machine	70 mm
3.	Test Loads	10,25,50,100 gms.
		and 200 to 1000 gms. in steps of 100 gms.
4.	Load Accuracy	± 1% of nominal load value
5.	Type of Indentor	Micro Vickers Diamond
		Indentor (136° Pyramid)
6.	Magnification
	a) Objective Magnification	1OX, 20X and 5OX selectable
	b) Eyepiece Magnification	12.5X (Approx)
	c) Total Magnification	125X, 250X and 625X
7.	Max. Diagonal Measurement	with 1 OX objective - 1 mm
	(Field of view)	with 20X objective - 0.5 mm
		with 50X objective - 0.2 mm
8.	Least count of Measurement	with 1 OX - 0.001 mm
		with 20X - 0.0005 mm
		with 50X - 0.0002 mm
9.	X-Y Stage
	a) Size of table top	120 mm x 120 mm
	b) Max. travel XX & YY axis	50 mm each
	c) Least count of Measurement	0.01 mm
10.	Vertical Positioning of sample	By raising and lowering of main screw with handwheel. Additional knob provided for fine focusing.
11.	Application of test load	By a two position hand operated lever.
12.	Removal of test load	Automatic
13.	Power Supply	Single Phase, 230 V, 50 Hz, AC
14.	Power	50 Watts
15.	Weight of Machine (Net)	110 kg. (Approx)
16.	Overall Dimensions of machine	500 L x 500 W x 1450 H (mm) (Approx.)
		(with machine stand)

Accessories

Sr. No.	Particulars	Qty
1 .	X-Y Stage	1 No.
2.	Diamond indnentor (136° Pyramid)	1 No.
3.	Measuring Microscope	1 No.
4.	Objective lenses -10X -20X -50X	1 No. 1 No. 1 No.
5.	Standard Test Block (HV-1)	1 No.
6.	Legs for level adjustment	3 No.
7.	Spare bulb	1 No.
8.	Set of tools	1 set
9.	Hardness calculation table	1 copy
10.	Instruction manual	1 No.
11.	Machine stand	1 No.

The voltage sensing circuit is protected by a heavy-duty metal-oxide varistor of 500V rating connected across the load terminals. Hence the load supply should not exceed 500VAC.

The current sensing shunt is protected by a replaceable glass-cartridge fuse on the rear of the instrument. This glass cartridge fuse should not be replaced by fuse of higher ratings or wire shorts. Otherwise the instrument may get damaged.

Application

Micro Vickers hardness Tester has several applications.

1.Finished components (thin sheets, fine wires, etc.) Watch parts like Springs, Pivot bearings, Gears, Cutting edge of Razor blades, Drills, File teeth, etc, Metallic foils, Surgical needles, Pen points and so on.

2. Study of surface coatings like electroplated coatings, extremely thin case hardened parts, anodised castings of alluminium, shot blasted or rolled faces.

3. Heat treatment effects like Tempering of steel, Hardness of visible precipitated particles, hardness of austenitic and martensitic areas, homogenization treatment.

4. Alloy constitutional problem, (Micro indentation tests in study of equilibrium diagram), mutually soluble / insoluble materials, hardness of complex carbides, hardness of components of microstructure.

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