Rau 20 # steel hlab nrog phab ntsa thicknesses txog 87 hli, kev ncaj ncees sab hauv yog qhov tseem ceeb heev, txawm tias qhov me me thiab cov impurities tuaj yeem cuam tshuam lawv cov qauv kev ncaj ncees thiab kev ua tau zoo, thiab kev kuaj ultrasonic tuaj yeem txheeb xyuas cov kev tsis zoo no.
Kev ntsuam xyuas ultrasonic, tseem hu ua UT, yog cov txheej txheem kuaj tsis muaj kev puas tsuaj uas siv cov khoom ntawm kev xav, refraction, thiab attenuation ntawm ultrasonic nthwv dej thaum lawv nthuav tawm los ntawm cov khoom siv los xyuas qhov tsis xws luag hauv cov khoom.
Thaum lub ultrasonic nthwv dej ntsib qhov tsis xws luag nyob rau hauv cov khoom xws li cov kab nrib pleb, inclusions los yog qhov, reflected nthwv dej yuav raug generated, thiab qhov chaw, cov duab thiab qhov loj ntawm qhov tsis xws luag yuav txiav txim tau los ntawm kev tau txais cov reflected nthwv dej.
Los ntawm kev soj ntsuam xyuas kom zoo, nws ua kom ntseeg tau tias tag nrho cov yeeb nkab steel tsis muaj qhov tsis xws luag thiab ua raws li cov qauv thiab cov neeg siv khoom xav tau.
Botop yog ib tug kws tshaj lij thiab txhim khu kev qha Welded Steel Pipe chaw tsim tshuaj paus thiab Seamless Steel Pipe stockist nyob rau hauv Suav teb, muab koj cov khoom lag luam steel nrog txhim khu kev qha zoo thiab cov nqi sib tw. Peb cog lus tias yuav txhawb nqa lub koom haum soj ntsuam thib peb rau tag nrho cov khoom peb muag, thiab peb yuav npaj cov neeg soj ntsuam xyuas cov kav hlau dua thaum txhua pawg ntawm cov kav hlau xa tawm kom ntseeg tau tias cov kav hlau zoo dua.
GB / T 8162 yog tus qauv kev qhia tawm los ntawm Tuam Tshoj rauseamless steel kavrau kev tsim qauv. 20 # yog cov qib carbon steel uas muaj cov khoom siv zoo thiab kev ua haujlwm, dav siv hauv kev tsim vaj tsev thiab cov khoom siv tshuab.
GB / T 8162 Qib 20 tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv kho tshuab raws li hauv qab no:
GB/T 8162 Qib 20 Tshuaj muaj pes tsawg leeg:
| Qib hlau | Chemical composition, nyob rau hauv % los ntawm huab hwm coj | |||||||
| C | Si | Mn | P | S | Cr | Ni | Cu | |
| 20 | 0.17-0.23 Nws | 0.17-0.37 Nws | 0.35-0.65 Nws | 0.035 max | 0.035 max | 0.25 max | 0.30 max | 0.25 max |
GB/T 8162 Qib 20 Mechanical Properties:
| Qib hlau | Tensile zog Rm MPa | Yielding zog ReL MPa | Elongation A % | ||
| Nominal Diameter S | |||||
| ≤16 hli | ＞ 16 mm ≤ 30 mm | ≥30mm | |||
| 20 | ≥410 | 245 | 235 | 225 | 20 |
Post lub sij hawm: Oct-15-2024