Metalcomponensin bearings come n contact ith ottermetalorcontainments,so he hardiening process during manuracturing is a vita to ensu inglesswearand alonserservice Ifs, Hardienling alscprovides the optimal physical characteristics for the bearing's use.
There are three main types of hardening commonly used on bearing applications: case, induction and through.
Each involves:
1.Heating to a specified temperature under tight controls
2. Holding the temperature for the appropriate amount of time
3. Cooling according to the methods which can range from a slow cool in a furnace to a fast cool through quenching.Case hardening-or surface hardening-is a lot like how it sounds, hard on the exterior and soft in the interior.The processresuts i the sufice meta harsenings whil he materalbelow the exterior remains sotft,This strusture alws he core tomaitan ts toushress, Casharsenins is spestfetforapicationswhere a shock load is likely to occur, such as in construction equipment.Process: Bearing case hardening uses one of two methods carbonizing or induction hardening.Carbonzins hardens he bearing n an atmsephere ammonia sas and disobiated mmoma,w hia the bearing is heated to 920 dasres Coelsius The lensth of ime he bearing spends in this charsedstmosphere determines the dlepth of the hardness, Using this method,bearins can be case hardened affer being machined.quenched and tempered with onlyalile dislortionIndustion harciening uses an oletric wiro colto acthiove the sameresulsas cartbonina,hovover the proess can be localizedioa spoifi arsa,suchas a ballboaring's aceway,This fom of non con-tact heat treatiment uses electromagnetic insuction. The depth of the harcinessis determined bythe fresueneyof the voltase, material composton and heating timeframe.
Throush harienins-lsokrown as quonch and omper-ispctfed for applicatons here uniform hardhness, strensth aond wear esistanceis resuroed, When a bearins uses this othos, t bocomeshard from the suface through to the core. This form ofhardening is more cost effcient than case hardening,but may resultin britie steel if impropery tempered.Froces, Throush hariening creates fne cartide troushouthestein a processthatuses apl uenthinsatter hesatins, The bearing i reated, hen uenches n otther asaltorol1bath,ond lemperedto increase ductility.
The goalof hardeningisto ncrease the strensth of the meta,A secondary process, sush as tempering, is used to soten he material, ncrease toushmess,etuce bitleness or increase dluetly