A method of manufacturing plowshares

 

(57) Abstract:

The invention relates to the agricultural industry. Ploughshare is formed by casting of steel with a carbon content of 0.8-1.4% and manganese 10-15%, and then produce the tempering by heating to a temperature of 1000-1050oC and cooled in water. When the plowing of the soil surface layer of shares subject to abrasion and shock, hardened due to the transformation of austenite into martensite, good abrasion resistant, and as a result of work hardening, i.e. distortion of the crystal lattice under the influence of cold deformation. The austenitic structure of the internal volume is characterized by high viscosity and successfully withstands shock loads.

The invention relates to agricultural machinery, and in particular to methods of production plow shares.

There is a method of making plowshares, which consists in forming shares performed by the rolling of a strip of periodic profile, logging plowshares path stamping, cutting, punching and countersink holes, sharpening blades, and subsequent heat treatment including quenching and tempering (U.S. Pat. USA 2733500, CL 29-14, 1974).

There is also known a method of manufacturing population, providing education blades plowshares and thickening with a stiffening rib, cutting her outer contour of the shares and the punching of holes (RF patent 2027331 And 15/12 01, 21 N 7/00, 1992).

The closest is the way plow shares, consisting in the formation of a plow blade and its subsequent heat treatment including quenching (ed. mon. The USSR 704707, 21 N 7/06, 1977). Ploughshare is formed by rolling strips of special periodic structure, for example, from lemasney steel L, cutting along the contour, punch and countersink the holes, the plastic deformation portion of the plow blade for shaping the blade, flexible middle part in the lateral direction, calibration. After quenching to produce a vacation.

The disadvantages of the known methods are a large amount of machining in the formation of a plow blade and its associated metal loss, the complexity of the transition to production of the shares of a different design or size, including the use of a special profile steel and special high-cost equipment (rolls, stamps) for each type of shares, as well as rapid wear and breakage of the shares in the operation, which necessitates frequent replacement of them in the process of work the e loss of material, simplifying the transition to production of the shares of a different design.

This is achieved by a method of manufacturing a snow plow blade, which consists in forming a plow blade casting method of steel with a carbon content of 0.8-1.4% and manganese 10-15% and its subsequent hardening by heating to a temperature of 1000-1050oC and cooled in water. When the plowing of the soil surface layer of shares subject to abrasion and shock, hardened due to the transformation of austenite into martensite, good abrasion resistant, and as a result of work hardening, i.e. distortion of the crystal lattice under the influence of cold deformation. The austenitic structure of the internal volume is characterized by high viscosity and successfully withstands shock loads.

Resistance of high-manganese steel to abrasion and ability to withstand shock loads are known. However, these qualities are useful in the operation of the parts made from such steel, it is extremely difficult any form of mechanical processing, resulting in the manufacture of shares by known methods of this steel is not practicable. Despite the long history of production plowshares and a large number of developments related to the perfection of high-manganese steel production share it is not known, which makes the proposed method meets the criterion of "inventive step".

Example. Molds are made by wooden model, appropriate to the design of shares with regard to the education of the mounting holes and without allowance for processing. For the manufacture of shares used steel g containing 12.7% of manganese and 1.1% of carbon. After the liberation of castings plow blade from the mold and removal of the sprue and profits produced heat is suspended from the mounting hole of the shares in an induction furnace to a temperature of 1030oC and cooling in the water. After quenching the steel plough-shares purchased austenitic structure. During the trial operation of the surface layer of the shares, subject to abrasion and shock, prosnylsja due to the transformation of austenite into martensite, and as a result of work hardening. As wear and pack the surface layer plowshares his hardening continued. Due to the high viscosity of the austenitic structure of the internal volume of the shares successfully withstand shock loads. The resistance of these shares was 4-5 times higher than in the control plowshares, obtained in a known manner from steel 65G.

Transition to production plowshares other forms and departmental tooling and equipment.

A method of manufacturing a plow shares, including the formation of a plow blade and subsequent quenching, wherein the blade is formed by casting of steel with a carbon content of 0.8-1.4% and manganese 10-15%, and the quenching is carried out with heating to a temperature of 1000-1050oC and cooled in water.

 

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