Carbon steel screws are often required to be treated for heat treatment.  The carbon steel screw heat treatment process is precisely the quenching carburizing heat treatment.  We also often call it screw hard treatment.  It is a screw surface processing technology.  Normally, the heat treatment will be stopped under the condition that the screw strength is not enough, and the strength level of the screw will be improved!  The strength of the screws produced by different grades of carbon steel data is also different.  Let us look at the strength grades of different grades of carbon steel data after heat treatment.

1010/1018/1022 Carbon Steel The low carbon steel screws of the 1010, 1018, 1022 grades can only reach 4.8 or less without hardening.  Different grades of iron wire have different strength levels.  The demand note is that as a low carbon steel material below 1018, the strength level of the screw can reach 6.8 after the heat treatment process.  However, the heat treatment can only improve the hardness of the low carbon steel screws, and the core has nothing to change.

Therefore, the strength grade of low carbon steel generally refers to the Vickers hardness of the low carbon steel screw (refers to the hardness of the screw surface, which is a routine test).  The carbon steel screw of 10B21 carbon steel grade 10B21 data can reach 8.8 or above after hardening treatment.  It can detect the hardness of chromium (HRC) (refer to the detection of the hardness and core hardness of carbon steel screws).  The carbon steel screws of CM435 carbon steel grade CM435 can reach 10.9 and 12.9 after hardening treatment.  To (HRC) appearance hardness and core hardness.  45K carbon steel grade 45K carbon steel data belongs to the quenching material, which refers to the 45K wire material has been quenched and tempered (double heat treatment of quenching plus low temperature tempering).

The steel's plasticity, toughness, strength and other functions are lost, which is ineffective in preventing the screw from deforming during the early heat treatment.  Preheating consumption during consumption, adding two consumer processes, so that 45K carbon steel screws can reach 8.8 after consumption.  In addition to the above carbon steel materials, there are often hard-to-treat requirements.  Stainless steel 410, 430 and 7 series alloy aluminum can also be hardened.  Under the condition of not considering the consumption cost of screws, boron, carbon and nitrogen In terms of elemental co-infiltration, almost all metal materials can be hardened, but not only the cost of the capital, but also the complexity of the operation.