INTRODUCTION OF EASY CUTTING STRUCTURAL STEEL

Easy cutting steel structure is to improve the machinability of steels by certain elements in steel, steel for high speed cutting on the automatic machine for. Common elements to improve the machinability of S, Pb, Ca, etc., among which the most commonly used S, S formation of MnS inclusions in the steel, MnS is very brittle, and have certain lubrication so chip easy to break, the workpiece surface finish, reduce tool wear, improve the cutting speed.

Easy cutting structural steel although the steel containing P, S more, single in this kind of steel is as a beneficial element to join or save down, therefore, belong to high quality steel. Easy cutting structural steel is used as the production standard parts such as small screws, nuts, oil pumps, watches, computers, typewriter parts, machine tools, light bars, screws, etc.. Free cutting steel plate with a “Y” with steel, low alloy steel in Y40Mn are good, the rest are carbon steel.

Easy cutting structural steel is to add some elements in the steel to make the steel become brittle, so that the cutting is easy to break into chips, which is beneficial to improve the cutting speed and prolong the life of the cutter. The steel becomes brittle element is mainly sulfur, in the ordinary low alloy easy cutting structural steel used in lead, Te, Bi and other elements of the sulfur content of WS in the 0.08%-0.3% range, the manganese content of WMn in the 0.60%-1.55% range. The sulfur and manganese in the steel are in the shape of manganese sulfide, and the manganese sulfide is very crisp and has the lubricating effect, so that the cutting can be broken easily, and the quality of the processed surface can be improved.