Brief introduction of 40Cr round steel

(1) 40Cr round steel manufacturing method. Alloy steel is usually smelted in an electric furnace because the atmosphere in the electric furnace is easy to control, and high temperature and high smelting quality can be obtained. The alloy elements are added to the molten steel in the form of an intermediate alloy according to the use of the steel before smelting, and the steel ingot is poured into the steel ingot. Various ingots are available. If the mold is injected, the steel castings can be obtained. After the steel ingots are forged or rolled, various shapes of steel and forgings are obtained.

(2) 40Cr round steel is used. 40Cr round steel is one of the most widely used steels in the mechanical manufacturing industry. It has good comprehensive mechanical properties, low temperature impact toughness and low notch sensitivity after quenching and tempering. It is commonly used in automobile steering knuckles, rear axles, machine gears, The manufacture of mechanical parts such as shafts, worms, spline shafts, and top sleeves has a broad market and great prospects in this field.

(3) 40Cr round steel standard: GB/T3077.2015, length 6 meters -10 meters.

Characteristics of 40Cr round steel

According to the production process and application requirements, 40Cr round steel is classified according to the following conditions:

(1) Classification of chemical components. According to the main types of alloying elements in steel, it can be divided into manganese steel, chrome steel, silicon manganese steel, chromium manganese titanium steel, tungsten chromium vanadium steel and the like. According to the total content of alloying elements in steel, it can be divided into low alloy steel, medium alloy steel and high alloy steel.

(2) Classification use. There are alloy structural steel, alloy tool steel and special performance steel. Such as wear-resistant steel, stainless steel acid-resistant steel, electromagnetic steel, etc.

(3) Classified by metallographic organization. There are ferritic steel, pearlitic steel, martensitic steel and austenitic steel.

40Cr round steel main production plant and transportation area

The main production areas of alloy steel include Huaigang Plant, Yonggang Plant, Baosteel Plant, Daye Steel Plant, Northeast Special Steel Plant, Nangang Plant, Xining Special Steel Plant and Xingcheng Steel Plant. At present, China has exported a large amount of alloy steel to Hong Kong and Nanyang.

40Cr round steel specifications and appearance quality

There are round steel, flat steel, Fan Gang, etc., the size and allowable deviation of steel should meet the requirements of the corresponding national standards. Cracks, crusting, wrinkles and inclusions on the steel surface must be visible. If it is necessary to remove the above defects, the steel bars must be neatly cut and the burrs at both ends removed.