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Kev tsis
Segment Tunnel Ncaj Bolt
Segment Tunnel Ncaj Bolts yog tsim tshwj xeeb rau kev sib txuas ncaj ncaj hauv ib lub qhov. Cov bolts no yog qhov tseem ceeb hauv kev tswj kev ruaj ntseg thiab kev ncaj ncees ntawm tag nrho lub qhov. Lawv cov qauv tsim yog tsim los ua kom tau raws li cov kev xav tau ntawm kev sib txuas ntawm cov ntu ncaj, muab kev txhawb nqa rau lub qhov taub.
Segment Qhov Ncaj Bolt Specification
| Dimension | Arc Ntev mm | Tensile zog | Kev kho saum npoo |
|---|---|---|---|
| M25-M48 | 480-880 | 4.6,4.8,5.6,5.8,8.8 | Dacromet, Kub dip Galvanized |
Tunnel Segment Bolt Mechanical Property
| Tunnel Segment Bolt | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mechanical thiab Physical Properties | Qib Kev Ua Haujlwm | ||||||||||||
| 3.6 | 4.6 | 4.8 | 5.6 | 5.8 | 6.8 | 8.8 | 9.8 | 10.9 | 12.9 | ||||
| d Tsawg dua lossis sib npaug rau 163) | d＞163) | ||||||||||||
| Nominal Tensile zog | N / hli 2 | 300 | 400 | 500 | 600 | 800 | 800 | 900 | 1000 | 1200 | |||
| Tsawg kawg tensile zog | N / hli 2 | 330 | 400 | 420 | 500 | 520 | 600 | 800 | 830 | 900 | 1040 | 1220 | |
| Vickers hardness HV F Ntau dua los yog sib npaug rau 98N | min | 95 | 120 | 130 | 155 | 160 | 190 | 250 | 255 | 290 | 320 | 385 | |
| max | 2206) | 250 | 320 | 335 | 360 | 380 | 435 | ||||||
| Brinell hardness HB F =30 D2 | min | 90 | 114 | 124 | 147 | 152 | 181 | 238 | 242 | 276 | 304 | 366 | |
| max | 2096) | 238 | 304 | 318 | 342 | 361 | 414 | ||||||
| Rockwell hardness HR | min | HRB | 52 | 67 | 71 | 79 | 82 | 89 | / | / | / | / | / |
| HRC | / | / | / | / | / | / | 22 | 23 | 28 | 32 | 39 | ||
| max | HRB | 95.06) | 99.5 | / | / | / | / | / | |||||
| HRC | / | 32 | 34 | 37 | 39 | 44 | |||||||
| Nto hardness HV 0.3 max | / | 7) | |||||||||||
| Yield point N/mm2 | Nominal | 180 | 240 | 320 | 300 | 400 | 480 | / | / | / | / | / | |
| min | 190 | 240 | 340 | 300 | 420 | 180 | / | / | / | / | / | ||
| Qhia meej tsis sib npaug elongation stress N/mm2 | Nominal | / | / | 640 | 640 | 720 | 900 | 1080 | |||||
| min | / | / | 640 | 660 | 720 | 940 | 1100 | ||||||
| Guaranteed kev nyuaj siab N / mm2 | 0.94 | 0.94 | 0.91 | 0.93 | 0.9 | 0.92 | 0.91 | 0.91 | 0.90 | 0.88 | 0.88 | ||
| 180 | 225 | 310 | 280 | 380 | 440 | 580 | 600 | 650 | 830 | 970 | |||
| Rhuav torque MB, Nm min | / | raws li GB / T3098.13 cov cai | |||||||||||
| Elongation tom qab tawg % min | 25 | 22 | / | 20 | / | / | 12 | 12 | 10 | 9 | 8 | ||
| tus nqi txo hauv cheeb tsam % min | / | 52 | 48 | 48 | 44 | ||||||||
| Shock absorption ua hauj lwm Aku, min | 25 | 30 | 30 | 25 | 20 | 15 | |||||||
| Lub taub hau ruaj khov | Tsis so | ||||||||||||
| Yam tsawg kawg qhov siab ntawm undecarburized xov E | / | 1/2H1 | 2/3H1 | 3/4H1 | |||||||||
| Qhov siab tshaj plaws ntawm tag nrho decarburized txheej G, mm | / | 0.015 | |||||||||||
| Hardness tom qab tempering | / | Qhov sib txawv ntawm qhov nruab nrab hardness ua ntej thiab tom qab tempering tsis ntau tshaj 20HV | |||||||||||
| Deg tsis xws luag | Raws li GB / T 5779.1 lossis GB / T 5779.3 cov cai | ||||||||||||
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