Thaum tshav kub kub resistant steel pas nrig rau valve khoom

Thaum tshav kub kub resistant steel pas nrig rau valve khoom

Qhov ntsuas no txhais tau hais tias qhov loj me, cov duab, cov kev xav tau, cov kev sim, kev lees paub, cov cim ntim thiab cov ntawv pov thawj zoo ntawm cov khoom siv hluav taws xob kub-resistant steel rods (round steel, square steel, flat steel and hexagonal steel, hereinafter referred to as steel rods). Cov nqe lus hauv cov ntaub ntawv hauv qab no dhau los ua cov ntsiab lus ntawm qhov ntsuas no los ntawm kev siv rau qhov ntsuas no. Rau cov ntawv sau hnub tim, tag nrho cov kev hloov kho tom ntej (tsis suav nrog kev ua yuam kev) lossis kev hloov kho tsis siv rau qhov ntsuas no, txawm li cas los xij, ob tog rau kev pom zoo nyob rau hauv qhov ntsuas no tau txhawb kom tshawb nrhiav qhov muaj ntawm cov ntawv no.

1 ntau

Qhov ntsuas no txhais tau hais tias qhov loj me, cov duab, cov kev xav tau, cov kev sim, kev lees paub, cov cim ntim thiab cov ntawv pov thawj zoo ntawm cov khoom siv hluav taws xob kub-resistant steel rods (round steel, square steel, flat steel and hexagonal steel, hereinafter referred to as steel rods).

Qhov ntsuas no siv tau rau cov kub dov, forged lossis txias ua haujlwm steel rods nrog qhov ntev (inch, sab ntev, tuab lossis qhov sib txawv ntawm qhov sib txawv, qhov no hu ua qhov ntev) tsis ntau dua 250mm. Kub dov thiab forged steel rods nrog qhov ntau thiab tsawg dua 250mm lossis txias ua haujlwm steel rods nrog qhov ntau thiab tsawg dua 120mm kuj muaj nyob rau ntawm kev sib tham ntawm ob tog.

2 Cov ntaub ntawv siv tau zoo

Cov nqe lus hauv cov ntaub ntawv hauv qab no dhau los ua cov ntsiab lus ntawm qhov ntsuas no los ntawm kev siv rau qhov ntsuas no. Rau cov ntawv sau hnub tim, tag nrho cov kev hloov kho tom ntej (tsis suav nrog kev ua yuam kev) lossis kev hloov kho yuav tsis siv rau qhov ntsuas no. Txawm li cas los xij, ob tog rau kev pom zoo raws li qhov ntsuas no tau txhawb kom tshawb xyuas qhov muaj *** versions ntawm cov ntaub ntawv no. Rau cov ntaub ntawv tsis muaj ntaub ntawv, cov version siv tau rau qhov ntsuas no.

4 Order Content

Cov ntawv cog lus lossis kev txiav txim muab tso rau hauv qhov ntsuas no yuav tsum suav nrog cov hauv qab no:

5 Kev faib tawm

5. 1 Steel rods yuav muab faib ua plaub hom raws li lawv cov qauv yam ntxwv: Austenitic hom, ferritic hom, martensitic hom thiab nag lossis daus-hardened hom.

5. 2 Steel rods tau muab faib ua ob pawg hauv qab no raws li kev ua haujlwm sib txawv. Kev siv thiab ua cov txheej txheem ntawm cov pas nrig steel yuav tsum tau qhia hauv daim ntawv cog lus. Yog tias tsis yog, cov khoom yuav tsum tau ua los ntawm cov hlau txiav.

Qhov loj me, zoo li, qhov hnyav thiab qhov sib txawv tau tso cai

6. 1 Qhov loj, cov duab thiab tso cai sib txawv ntawm kub dov puag ncig thiab square tooj liab

Qhov ntev, cov duab thiab kam rau ua ntawm kub dov puag ncig thiab square steels yuav tsum ua raws li cov specification ntawm GB / T 702-2004, thiab cov ncauj lus kom ntxaws yuav tsum tau teev nyob rau hauv daim ntawv cog lus. Yog tias tsis tau qhia, 2 pawg ntawm GB / T 702-2004 yuav tsum tau ua.

6. 2 Loj, cov duab thiab tso cai sib txawv ntawm kub dov ca steel

Qhov loj me, cov duab thiab qhov sib txawv ntawm qhov kub dov ca steel yuav tsum ua raws li cov lus qhia tshwj xeeb hauv GB / T 704-1988 thiab cov ncauj lus kom ntxaws yuav tsum tau teev nyob rau hauv daim ntawv cog lus. Yog tias tsis qhia, tus qauv GB / T 704-1988 yuav tsum raug siv.

6. 3 Dimensions, duab thiab tso cai deviations ntawm kub dov hexagon hlau

Qhov ntev, cov duab thiab kam rau ua ntawm kub dov hexagonal steel yuav tsum ua raws li cov lus qhia tshwj xeeb hauv GB / T 705-1985, thiab cov ncauj lus kom ntxaws yuav tsum tau teev nyob rau hauv daim ntawv cog lus. Tsis tau qhia hauv GB/T 705-1985 scale 2 pab pawg ua tiav.

6. 4 Forging puag ncig thiab square steel loj, cov duab thiab kam rau ua

Qhov ntev, cov duab thiab kam rau ua ntawm forged round thiab square steels yuav tsum ua raws li cov specification ntawm GB / T 908-1987, thiab cov ncauj lus kom ntxaws yuav tsum tau teev nyob rau hauv daim ntawv cog lus. Yog tias tsis tau qhia, ua raws li GB / T 908-1987 scale 2 pawg.

6. 5 Dimension, puab thiab tso cai sib txawv ntawm forged ca steel

Qhov ntev, cov duab thiab kam rau ua qhov sib txawv ntawm forged tiaj tus hlau yuav tsum ua raws li qhov delineation ntawm GB / T 16761-1997, thiab cov ncauj lus kom ntxaws yuav tsum tau teev nyob rau hauv daim ntawv cog lus. Yog tias tsis tau qhia, ua rau 2 pawg raws li GB / T 16761-1997 nplai.

6.6 Dimension, shape and tolerance deviation of txias ua hauj lwm steel pas nrig

6.6.1 Dimensions thiab tso cai deviations

6.6.1.1 Qhov sib txawv me me ntawm qhov sib txawv ntawm cov hlau ua haujlwm txias yuav tsum ua raws li qhov kev sib cais hauv Table 1, thiab qib siab kam rau qhov sib txawv yuav tsum tau qhia hauv daim ntawv cog lus. Yog tias tsis yog, nws yuav tsum ua raws li h11l. Qhov muaj feem cuam tshuam ntawm kev ua haujlwm txias-ua haujlwm steel pas nrig sib txawv ntawm qib tuaj yeem xaiv raws li Table 2.

6.6.1.2 Rau steel rods uas tau kho cua sov thiab pickling tom qab ua hauj lwm txias, qhov tso cai sib txawv yuav tsum yog ob zaug ntawm lub looser deviation teev nyob rau hauv Table 2.

6. 6. 2 Zoo thiab kam rau siab sib txawv

Qhov dabtsi yog khoov degree thiab unroundness (square) los yog sab ntev sib txawv ntawm txias ua hauj lwm steel pas nrig yuav tsum ua raws li lub demarcation ntawm Table 3. Hlau rau tsis siv neeg txiav yuav tsum tau teev nyob rau hauv daim ntawv cog lus.

Table 3 Khoov degree, square degree los yog sab ntev sib txawv ntawm txias ua hauj lwm steel bar

6.7 Nyhav

Hlau pas nrig feem ntau xa los ntawm qhov hnyav tiag tiag.

Cov pas nrig hlau tuaj yeem xa tuaj rau hauv lub xeev ntawm kev kho cua sov lossis tsis muaj kev kho cua sov. Thaum xaj, koj tuaj yeem xa mus rau 7.3.1 ~ 7.3.5 los xaiv lub xeev ntawm kev xa khoom thiab qhia nws hauv daim ntawv cog lus. Kev xa khoom tsis muaj kev kho cua sov yog tias tsis tau teev tseg. Saib Table A.1 Table A.4 rau kev kho cua sov rail system ntawm ntau hom steel tuav nyob rau hauv Appendix A. Khoom kho kho los yog annealing kho yuav tsum tau xaiv rau cov nag lossis daus hardening steel tuav raws li lub microstructure ntawm cov hlau. Lub annealing rail system yuav tsum txiav txim siab los ntawm kev sib tham ntawm cov khoom siv thiab cov neeg xav tau. Nyob rau hauv cov ntaub ntawv ntawm tsis muaj kev pom zoo, lub annealing kub yog feem ntau 650 ℃ ~ 680 ℃. Raws li kev pom zoo los ntawm ob tog, nag lossis daus-hardened steel rods (tshwj tsis yog 05Cr17Ni4Cu4Nb) tsis tuaj yeem kho.

Mounting: Kub resistant steel pas nrig ntawm cov khoom siv valve (1)

7 Kev Yuav Tsum Muaj

7.1 Hom thiab tshuaj muaj pes tsawg leeg

7.1.1 Cov qib ntawm cov hlau, tib tus lej code thiab cov tshuaj lom neeg muaj pes tsawg leeg (smelting tsom xam) yuav tsum ua raws li kev sib cais hauv Table 4-7.

7.1.2 Qhov tso cai sib txawv ntawm cov tshuaj muaj pes tsawg leeg ntawm cov pas nrig steel yuav tsum ua raws li GB / T222.

7.2 Txoj kev Smelting

Tshwj tsis yog tias muaj lwm yam teev tseg hauv daim ntawv cog lus, cov txheej txheem ntawm kev pib steelmaking (dej) thiab off-furnace refining yuav tsum tau siv.

7.3 Kev xa khoom raws li txoj cai

Cov pas nrig hlau tuaj yeem xa tuaj rau hauv tshav kub-kho lossis tsis-kub-kho lub xeev. Thaum xaj, koj tuaj yeem xa mus rau 7.3.1 ~ 7.3.5 txhawm rau xaiv lub xeev xa khoom thiab qhia nws hauv daim ntawv cog lus. Kev xa khoom tsis muaj kev kho cua sov yog tias tsis tau teev tseg. Kev kho cua sov rail system rau txhua hom steel tuav

7.3.1 Austenitic steel pas nrig rau kev txiav yuav tsum tau kho los ntawm kev daws los yog annealing, los yog tej zaum yuav tsis kho tom qab kev sib tham los ntawm ob tog. Cov pas nrig steel rau kev kub siab ua haujlwm yuav tsum tsis txhob raug kho los ntawm kev daws los yog annealing.

7.3.2 Ferritic steel tuav yuav tsum tau muab tshem tawm thiab tsis tuaj yeem kho tom qab ob tog sib tham.

7.3.3 Mahalanobsidian steel pas nrig yuav tsum tau muab tshem tawm.

7.3.4 Precipitation hardening steel rods yuav tsum tau kho nrog tshuaj los yog annealing raws li cov qauv ntawm cov hlau. Lub annealing rail system yuav tsum txiav txim siab los ntawm kev sib tham ntawm cov khoom siv thiab cov neeg xav tau. Nyob rau hauv cov ntaub ntawv ntawm tsis muaj kev pom zoo, lub annealing kub yog feem ntau 650 ℃ ~ 680 ℃. Raws li kev pom zoo los ntawm ob tog, nag lossis daus-tawv steel rods (tshwj tsis yog 05Cr17Ni4Cu4Nb) tsis tuaj yeem kho.

7.3.5 Cold-worked steel rods uas tau txias-kos, polished, txiav los yog ua los ntawm ib tug ua ke ntawm cov kev no tej zaum yuav raug xa tom qab kev kho cua sov thiab pickling raws li xav tau los ntawm tus neeg thov.

7.4 Mechanical muaj nuj nqi

7.4.1 Kev kho cua sov rail system ntawm ntau hom hlau tuav lossis cov qauv yuav tsum tau txhais raws li Cov Lus A.1 ~ A.4 hauv Cov Ntawv Ntxiv A. Qhov loj ntawm cov qauv dawb paug rau kev kho cua sov feem ntau yog 25 hli. Thaum qhov loj ntawm steel pas nrig yog tsawg dua 25 hli, qhov loj me steel pas nrig yog siv rau kev kho cua sov. Lub tshuab ua haujlwm ntawm steel bar tsis muaj kev kho cua sov tom qab kos duab txias yuav tsum txiav txim siab los ntawm kev sib tham ntawm cov khoom siv thiab cov neeg xav tau.

7.4.2 Tom qab kev kho cua sov ntawm steel rods (tshwj tsis yog martensitic steel annealing), cov qauv yuav tsum tsis txhob raug kev kho cua sov, thiab nws cov khoom siv kho mob yuav tsum ua raws li ib leeg.

7.4.3 Rau cov hlau tuav tsis muaj kev kho cua sov, cov khoom siv kho tshuab ntawm cov qauv dawb paug tom qab kev kho cua sov yuav tsum ua raws li kev sib cais ntawm Table 8-11 raws li.

7.4.4 Lub tshuab ua haujlwm ntawm precipitate-hardened steel tuav yuav tsum qhia cov pab pawg kho cua sov hauv daim ntawv cog lus. Yog tsis yog, nws yuav tsum tau ua raws li Pawg 1.

7.4.5 Yog tias tus neeg muag khoom tuaj yeem xyuas kom meej tias lub tshuab ua haujlwm tau tsim nyog, qhov kev ntsuas kev ua haujlwm ntawm txhua lub tuam tsev lossis lub tuam tsev yuav raug tshem tawm.

7.5 Cov ntaub so ntswg tsis muaj zog

7.5.1 Qhov pom qhov pom qhov shrinkage, npuas, kab nrib pleb, inclusions, tev thiab dawb me ntsis yuav tsum tsis txhob raug tso cai nyob rau hauv lub acid leaching low-power test piece ntawm steel bar nyob rau hauv cross section. Lub steel bar rau txiav yuav tsum muaj qhov tsis xws luag xws li subcutaneous inclusions nrog qhov tob tsis tshaj li ib nrab ntawm nominal dimensional kam rau ua.

7.5.2 Cov kev tsim nyog qib ntawm cov kua qaub leached cov ntaub so ntswg uas tsis muaj kev loj hlob yuav tsum ua raws li kev demarcation hauv Table 12. Thaum tus neeg thov xav tau 1 txheej, nws yuav tsum tau qhia hauv daim ntawv cog lus. Rau steel rods loj dua 200mm, qhov tsim nyog theem ntawm qis me me microstructure yuav tsum tau txiav txim los ntawm ob tog los ntawm kev sib tham.

7.5.3 Yog tias tus neeg muag khoom tuaj yeem lav tau, nws pom zoo siv kev tshuaj xyuas ultrasonic lossis lwm yam kev tshuaj xyuas tsis muaj kev puas tsuaj es tsis txhob siv lub zog qis.

Table 12 Cov ntaub so ntswg qis qis

7.6 Kub saum forging

7.6.1 Cov hlau uas siv rau qhov kub sab saum toj forging (raws li tau teev tseg hauv daim ntawv cog lus) yuav tsum raug ntsuas kub saum toj kawg nkaus forging. Qhov siab ntawm tus qauv tom qab kub sab saum toj forging yuav tsum yog ib feem peb ntawm qhov siab ntawm tus qauv qub. Yuav tsum tsis muaj kab nrib pleb lossis tawg hauv cov qauv tom qab forging sab saum toj.

7.6.2 Rau steel rods loj dua 80mm, yog tias tus neeg muag khoom tuaj yeem xyuas kom meej tias qhov kev xeem forging saum toj kawg nkaus tsim nyog, qhov kev xeem yuav tsis ua.

7.7 Nto zoo

7.7.1 Qhov saum npoo ntawm cov pas nrig steel rau kev ua haujlwm siab yuav tsum tsis txhob muaj cov kab nrib pleb, nti, folds lossis inclusions. Yog tias qhov teeb meem saum toj no yog qhov tsim nyog, qhov tob yuav tsum ua raws li kev sib cais hauv Table 13, qhov dav yuav tsum tsis pub tsawg dua 5 npaug ntawm qhov tob, thiab qhov sib koom ua ke yuav tsum tsis txhob ntau tshaj ib qhov tob. Tus kheej zoo khawb, indentation, pitting thiab me me kab nrib pleb nrog qhov tob tsis tshaj 0.20mm raug tso cai los ntawm qhov loj me tsis tshaj li ib nrab ntawm nominal loj kam rau ua. Round steel pas nrig rau kev ua haujlwm siab, qhov saum npoo tuaj yeem tig los yog tev tawm raws li kev pom zoo ntawm ob tog.

Table 13 Tso cai qhov tob ntawm steel pas nrig defects rau kev ua haujlwm siab

7.7.2 Steel rods rau machining yuav tsum tau tso cai kom muaj qhov tsis xws luag nyob rau hauv lub zos tsis pub tshaj cov teev nyob rau hauv Table 14 los ntawm lawv nominal qhov ntev.
7.7.3 Qhov saum npoo ntawm cov pas dej txias ua haujlwm yuav tsum huv thiab du, thiab tsis muaj kab nrib pleb, nti, folds, suav nrog, tawg lossis oxide daim tawv nqaij yuav tsum raug tso cai. Cov pas hlau xa mus rau hauv kev kho cua sov yog tso cai kom muaj xim oxidation. Thaum tsis muaj cov kev cai tshwj xeeb, qhov saum npoo ntawm cov pas nrig hlau tau tso cai kom muaj tus kheej khawb, khawb, qhov chaw tsaus, pitting thiab lwm yam tsis xws luag uas nws qhov tob ntawm qhov loj me tsis tshaj qhov nominal dimensional kam rau ua.

7.7.4 Qhov saum npoo ntawm cov pas nrig hlau uas tau tig los yog tev, polished lossis polished yuav tsum tsis muaj qhov tsis xws luag cuam tshuam rau kev siv.

7.7.5 Tom qab kev sib tham los ntawm ob tog thiab qhia hauv daim ntawv cog lus, pickling, tig thiab lwm txoj kev yuav raug siv los tshem tawm cov tawv nqaij dub uas tsim los ntawm kev kho cua sov.

7.8 Cov Lus Qhia Tshwj Xeeb

Raws li cov kev xav tau ntawm tus neeg thov thiab los ntawm kev pom zoo ntawm ob tog, cov kev cai tshwj xeeb hauv qab no ntawm steel rods tuaj yeem muab tau.

8 Kev xeem txoj kev

Cov khoom tshuaj ntsuam xyuas thiab cov qauv kev sim ntawm txhua pawg ntawm cov pas nrig steel yuav tsum ua raws li cov lus qhia hauv Table 15.

9 Cov cai tswj xyuas

9.1 Kev tshuaj xyuas thiab kev lees paub

Kev tshuaj xyuas thiab kev lees txais ntawm cov pas nrig steel yuav tsum tau ua los ntawm kev saib xyuas kev ua haujlwm zoo ntawm tus neeg muag khoom.

9.2 Batch Txoj Cai

Steel rods yuav tsum tau soj ntsuam thiab txais los ntawm ntau. Txhua batch yog tsim los ntawm steel rods nrog unified qib, lub cub tawg tooj, txheej txheem txheej txheem, qhov loj me thiab tus me nyuam raws li txoj cai (unified heat treatment furnace times). Rau cov hlau smelted los ntawm electroslag remelting, nyob rau hauv lub premise uas cov txheej txheem yog tsis chaotic thiab cov kev cai ntawm qhov ntsuas no yuav tsum guaranteed, nws tau pom zoo kom xa cov hlau nyob rau hauv batch nrog lub smelting master cub tawg tooj ntawm consumable electrode, thiab nws yog qhia. nyob rau hauv daim ntawv pov thawj zoo.

9.3 Sampling site thiab sampling POTS

Qhov chaw kuaj thiab tus naj npawb ntawm txhua pawg ntawm kev tshuaj xyuas cov pas nrig steel yuav tsum ua raws li cov lus piav qhia hauv Table 15.

Table 15 Cov khoom tu, tus naj npawb ntawm cov qauv, qhov chaw kuaj thiab cov qauv ntawm cov pas nrig

9.4 Reinspection thiab txiav txim cov cai

9.4.1 Cov cai rau kev rov tshuaj xyuas thiab kev txiav txim yuav tsum raug txiav raws li GB/T 17505.

9.4.2 Yog tias tus neeg muag khoom tuaj yeem ua kom ntseeg tau tias cov hlau rods tsim nyog, tus neeg muag khoom pom zoo siv lub billet los hloov lub billet thiab loj es tsis txhob me me rau kev soj ntsuam cov txiaj ntsig ntawm cov tshuab ua haujlwm, tsis tshua muaj microstructure thiab non-metallic inclusions. steel rods los yog billets nrog tib lub cub tawg.

Ntim, kos npe thiab daim ntawv pov thawj zoo

Lub ntim, cim thiab daim ntawv pov thawj zoo ntawm steel rods yuav tsum ua raws li cov kev qhia tshwj xeeb hauv GB / T 2101.