产品详情specificationstype 13b forging coupler yoke
forged products mainly include 13b forging the end of the hook 17type forging coupler yoke as we
type 13b forging coupler yoke
forged products mainly include13b forging theend of the hook17 type forging coupler yokeas well as some of theparts of thebuffer.
now 13b forgingcoupler yoke, forexample:
a connection betweenthe train cars knucklecoupler yoke , as thetrain coupler yoke connectedto one of thebody play an important rolein thetrucking. 
its performance will directlyaffect the busspeed, trucks overloaded .
forging coupler yokeon the railway vehicleparts, forging coupler yokewith high technical content,high quality requirementsof the coupler yokeand billets.
forging coupler yokeprocess include: iffurnace frequency heating,roll forgingbillet, 8000 tonsfriction press forging,1600 tons friction presstrimming, special hydraulic machinebending, shaping,welding, heat treatment, magneticparticle inspection machineprocessing. includingforging, welding,magnetic particle inspection and heattreatment processes is keyto the productionprocess.
process requirements:
the forging:initial forging temperature of1230 ° c,the final forging temperature≥ 850 °c.
welding: weldingbefore holding temperatureof 250 ± 10 °c, holding time ≥120min post-weld heattemperature of 350 ±10 ° c, holdingtime ≥ 120min,pay attention to post-weldinto the furnaceinsulation products within thestipulated time.
magnetic particle inspection:proprietary certified stafffollow the rules and testing at thespecified location.
heat treatment: heat treatmentprocess for quenchingand tempering, quenchingtemperature of 910 ±10 ° c,holding time120-150min;tempering temperature: 610± 10 ° c, holdingtime180-210min.
mechanical properties to meet therequirements of forging coupleryoke.
keyindicators of the coupler yoke:
category
no.
 testitems
 technicalrequirements
 inspectiongages
mechanicalbehavior
1
rm
≥850mpa
 universaltesting machine
2
rp0.2
≥690mpa
3
a
≥14%
4
z
≥30%
5
-40°cakv
≥27j
 impacttesting machine
6
brinellhardness
241~311hbw
brinellhardness
crystallinephase test
7
 grainsize
≥6
 metallurgicalmicroscope
8
 crystallinephase organization
notallowed in the martensite and widmanstatten
maingeometry
9
detectionmodel

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南京永兴铁路配件有限公司
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13357716802
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