Hadfield steel - steel (11-14.5% Mn , 0.9-1.3% C ) with high resistance to wear (abrasion) at high pressures or impact loads, it also has high ductility.
| Hadfield Steel | |
|---|---|
| Chemical composition | |
Fe - 82% Mn - 13% C - 1% Si - 1% | |
| Alloy type | |
| Austenitic steel | |
| Mechanical properties | |
| plastic alloy | |
| Physical properties | |
| Density | 7890 kg / m 3 |
| Brinell hardness | HB 186—229 |
| Strength | σ in = 654-830 MPa |
| Marking | |
| 110Г13Л, 110Г13ФТЛ, 110Г13Х2Л | |
It was proposed in 1882 by the English metallurgist R. Hadfield . Steel grade designation in accordance with GOST 977-88 - 110G13L [1] . Hadfield's steel is strongly stuck under shock loads. Tracks of tanks , tractors , cars, cheeks of crushers, rail crosses, turnouts working under conditions of shock loads and abrasion, and also window grills in prisons that cannot be cut are made from it. Steel castings are rarely subjected to additional processing, as it is poorly processed by cutting due to hardening of the surface during the cutting process.
It is believed that Hadfield steel was the first alloy steel of mass production [2] .
| WITH | Mn | Si | Cr | Ni | Cu | S | P |
|---|---|---|---|---|---|---|---|
| no more | |||||||
| 0.90 - 1.40 | 11.50 - 15.00 | 0.30 - 1.00 | 1.0 | 1.0 | 0.30 | 0.050 | 0.120 |
Content
Rail Crosses
Hadfield steel has a high resistance to wear under shock loads and is the main material for the manufacture of railway crosses.
Infantry Helmets
Infantry helmets ( Helmet, steel, Mark I ) were made from Hadfield steel sheet, adopted by the British Army in 1915, and the American Army in 1917 under the designation M1917, which were widely used by these parties during the First World War - the total number of helmets of this type exceeded 7.5 million copies. The U.S. Army in 1942 adopted the Hadfield M1 helmet made of non-magnetic steel, which served in the Army and Marine Corps until the early 1980s, when it was replaced by a PASGT helmet made of organoplastic. The volume of the helmet M1 exceeded 20 million copies.
Tank Caterpillars
The use of Hadfield steel for the manufacture of tracks of tank tracks was first mastered by the British company Vickers in the late 1920s. The specified steel allowed to significantly increase the resource of tank tracks from 500 km (record of the period of the First World War) to 4800 km.
In the USSR, the smelting of Hadfield steel was mastered by 1936.
Prison Window Bars
The use of Hadfield steel for the manufacture of bars in prisons [3] was perhaps the most mocking technique against prisoners. Even having a saw for metal, it is impossible to cut such a grill, since during cutting there is a strong hardening of the surface to be treated, and as a result, hardening, increase in hardness to the hardness of its cutting saw and higher. This factor makes it impossible to cut through a grate made of Hadfield steel.
Notes
- ↑ GOST 977-88
- ↑ Mezenin N. A. Interesting about iron. M. "Metallurgy", 1972. 200 p.
- ↑ Wear resistance of steel 110G13L in various abrasive media . Date of treatment December 22, 2017.
See also
- Alloy steel