Product Name: carbon steel
Grade : Q235
Specifications : Thick T: 1.5 ~ 24 W W :800-1100 length L: C
Standard : GB/T700-2006
Product Scope:
With ductility, toughness , cold , good weldability, suitable for engineering machinery, construction machinery, agricultural machinery and other industries and the general structure stampings and welded pipe and so on.
Quenching specification :
Quenching temperature of 950 ℃, salt bath furnace heating , 10% NaCl brine cooling quenching.
Basic features:
GB700-88 standard carbon steel Q235 metallurgical quality divided by A, B, C, D four grades , each grade of steel are 0.3% Si content , except that the carbon and sulfur and phosphorus content different . AB- carbon content of 0.14% ~ 0.22% and 0.12% ~ 0.20%, CD grade carbon content of ≦ 0.18%, ≦ 0.17%, Mn content of the minimum level A , D SP minimum content level .
There are just a strong domestic manufacturing cold die quenching many instances application of low-carbon martensite.
Double glow plasma surface alloying technology , the Mo-Cr steel surface penetration, followed by super- saturated carburizing, quenching and tempering composite processing , Mo-Cr bend the layer thickness of 100 microns or more , the surface of the Mo content up to 20%, Cr content of 10% , supersaturated carburizing surface carbon content exceeds 2.0% , close to the surface composition of molybdenum high speed steel, surface hardness after quenching and tempering up to 1300HV, more than the general metallurgy high speed steel. Wear tests show that the friction coefficient increases contact stress increases , the relative wear resistance is 2.2 times the average GCr15 carburizing steel.
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