15CrMo karfe farantin jerin beaded jiki tissue zafi juriya karfe, da high zafi karfi (δb≥440MPa) da kuma antioxidant, da kuma wani anti-hydrogen lalata iya. Saboda karfe yana ƙunshe da babban abun ciki na Cr, C da sauran kayan haɗin gwiwa, karfe mai karfi ya fi bayyane da ƙarancin walda.

15CrMo walda

walda kayan

Weldability aiki halaye ga 15CrMo karfe,

Schedule I: walda pre-dumama, amfani da ER80S-B2L walda waya, T1G walda kasa, E8018-B2 walda bar, walda bar arc walda rufi, da gida zafi magani bayan walda.

Bayan welding zafi magani

Amfani da gwajin walda na shirin I, bayan walda ya kamata a yi maganin zafin jiki mai zafi. Heat magani tsari ne: dumama gudun ne 200 ℃ / h, hawa zuwa 715 ℃ insulation 1 sa'a da minti 15, sanyaya gudun 100 ℃ / h, iska sanyaya bayan sauka zuwa 300 ℃. Musamman amfani da JL-4 nau'in tracking irin lantarki dumama (1146 × 310) rufe kewaye walda suture, tare da aluminum auduga layer insulation, insulation layer kauri 50mm, zazzabi sarrafawa amfani da DJK-A nau'in lantarki dumama atomatik thermometer.

Walda tsari kimanta gwajin sakamakon

gwajin tsari Stretch gwajin karkata gwajin Tashin karfi gwajin aky (J / cm2)

Tensile ƙarfi δb / Mpa karya sassa karkata kusurwa fuska karkata baya karkata walda seam haɗuwa layi zafi tasiri yankin (HAZ)

Shirin I 550/530 Matsayi 50. cancanta cancanta 84.8 162 135.6

Shirin II 525/520 mata kayan 50. cancanta cancanta 79.4 109.2 96.7

15CrMo walda tsari

2.1 walda kayan

Don waldi siffofin 15CrMo karfe da kuma filin high matsin lamba bututun aiki, bisa ga baya kwarewa, dangane da waldi tsari katin samar da kasashen waje, mun zabi biyu shirye-shirye don waldi gwaji.

Schedule I: walda pre-dumama, amfani da ER80S-B2L walda waya, T1G walda kasa, E8018-B2 walda bar, walda bar arc walda rufi, da gida zafi magani bayan walda.

Schedule II: Yi amfani da ER80S-B2L walda waya, T1G walda kasa, E309Mo-16 walda bar, walda bar cika arc walda rufi, ba a yi zafi magani bayan walda. Samfurin sinadarai da kayan aikin inji na wayoyin walda da sanduna a cikin Table 1.

Table 1 Chemical Composition da kuma Mechanical Properties na walda kayan

型号 C Mn Si Cr Ni Mo S P δb/Mpa δ,%

ER80S-B2L≤0.05 0.70.41.2 <0.20.5 ≤0.025 ≤0.025 ≤500 25

E8018-B2 0.070.7 0.3 1.1 0.5 ≤0.04 ≤0.03 550 19

E309Mo-16≤0.12 0.5～2.5 0.9 22.0～25.0 12.0～14.0 2.0～3.0≤0.025≤0.035 550 25

2.2 Shirya kafin walda

Gwajin ya yi amfani da bututun karfe na 15CrMo, bayanan bayanai na φ325 × 25, nau'in slope da girman duba Hoto na 1.

A kusurwa grinder don waldi gaba grinding a ciki da waje da kuma a cikin 50mm kewayon slope don nuna karfe shine, sa'an nan kuma wanke da acetone tsabtace.

Gwajin yana da kwance daidaitaccen matsayi, da counterpart tsayi ne 4mm, amfani da hannu tungsten pole argon arc walda a duk fadin lambun makiyaya daidai-daidai maki walda shida, kowane maki karfi tsawon ya kamata ba kasa da 20mm. walda bar da aka gasa bisa ga bayanan tebur na 2.

Table 2 waldi bar baking bayani

welding bar model baking zafin jiki insulation lokaci

E8018-B2 300 ℃ 2h

E309Mo-16 150 ℃ 1.5h

Tsarin sigogi

Bayan tsarin I welding bukatar pre-dumama, bisa ga Tto-Bessyo da sauransu ya gabatar da lissafi pre-dumama zafin jiki formula:

To = 350√ [C] -0.25 (℃) Tsarin, To - Pre-dumama zafin jiki, ℃.

[C]=[C]x [C]p [C]p=0.005S[C]x

[C] x = C (Mn Cr) / 9 Ni / 18 7Mo / 90 Tsarin,

[C] x - carbon daidai da kayan aiki;

[C] p - girman carbon daidai; S - gwajin kauri (S = 25mm a cikin wannan labarin);

[C]x=C （Mn Cr）/9 7/90Mo=0.361

[C] p = 0.045 kuma zuwa = 138 ℃

Saboda haka zafin jiki yana da 150 ° C. Yin amfani da oxygen-acetylene flame don dumama gwajin, farko ta amfani da kalamu mai auna zafin jiki don yanke hukunci game da zafin jiki na farfajiyar gwajin (a cikin canjin launin rubutun hannu don kimanta shi da sauri da hankali), a ƙarshe ta amfani da ma'aunin zafin jiki na semiconductor, ya kamata ma'aunin ma'auni ya zaɓi aƙalla maki uku don tabbatar da cewa gwajin gaba ɗaya ya kai zafin jik

Lokacin walda, na farko Layer ya yi amfani da hannu tungsten polar argon arc walda kasa, don kauce wa walda a kan walda da walda seam baya samar da cavities, waya da aka yi amfani da ciki waya hanyar, watau walda waya da aka gabatar daga cikin bututun ta hanyar counterpart spacing. Sauran layers yi amfani da walda bar arc walda, total walda 6 layers, daya walda a kowane walda layers. Shirye-shiryen I da II walda tsari sigogi ga tebur 3, 4. Welding ta hanyar Scheme I

Table 3 walda tsari sigogi na Schedule I

walda sunan walda hanyar walda kayan walda walda Specifications / mm walda halin yanzu / A arc ƙarfin lantarki / V Pre-dumama da kuma interlayer zafin jiki zafi magani Specifications

Tungsten allon argon arc walda ER80S-B2L φ2.4 110 12

Cika Layer walda bar arc walda E8018-B2 φ3.2 5 85 ~ 90 23 ~ 25150 ℃ 715. ×75min

rufi Layer walda bar arc walda E8018-B2 φ3.2 5 85 ~ 90 23 ~ 25

Table 4 walda tsari sigogi na tsari II

walda sunan walda hanyar walda kayan walda walda Specifications / mm walda halin yanzu / A arc ƙarfin lantarki / V Pre-dumama da kuma interlayer zafin jiki zafi magani Specifications

Tungsten allon argon arc walda ER80S-B2L φ2.4 110 12

Cika Layer walda bar arc walda E309Mo-16 φ3.2 90 ~ 95 22 ~ 24 / /

rufi Layer walda bar arc walda E309Mo-16 φ3.2 90 ~ 95 22 ~ 24

Lokacin shiga, tsakanin layers zafin jiki ya kamata ba kasa da 150 ℃, don hana katsewar walda ya haifar da sanyaya na gwaji, a lokacin walda ya kamata ya yi aiki da masu walda biyu a maye gurbin, da nan da nan bayan walda ya kamata a dauki madaidaiciya da sanyaya matakai.

2.4 Bayan walda zafi magani

3 walda tsari kimantawa gwaji

Bayan gwajin walda 100% ultrasonic rauni bincike bisa ga JB4730-94 "matsin lamba kwantena ba tare da lalacewa ganowa" ka'idodin, walda suture Class I cancanta. A walda tsari kimantawa gwaji bisa ga JB4708 "karfe matsin lamba kwantena walda tsari kimantawa" ka'idoji. Sakamakon ƙididdiga a cikin Table 5.

Table 5 walda tsari kimanta gwajin sakamakon

gwajin tsari Stretch gwajin karkata gwajin Tashin karfi gwajin aky (J / cm2)

Tensile ƙarfi δb / Mpa karya sassa karkata kusurwa fuska karkata baya karkata walda seam haɗuwa layi zafi tasiri yankin (HAZ)

Shirin I 550/530 Matsayi 50. cancanta cancanta 84.8 162 135.6

Shirin II 525/520 mata kayan 50. cancanta cancanta 79.4 109.2 96.7

Sakamakon gwajin janye-janye ya sanar da cewa samfurin janye-janye na nau'ikan tsare-tsare biyu duk sun karya a cikin mater, wanda ke nuna ƙarfin janye-janye na walda seam ya fi mater; Bending gwajin duk cancanta, nuna filastik na walda sutures ne mafi kyau. Dangane da sakamakon gwajin tasiri a cikin tebur na 5, tsarin I na tasiri ya fi girma fiye da tsarin II, wanda ya tabbatar da cewa tsarin I na bayan walda na zafi ya fi dacewa, high temperature annealing ba kawai ya cimma inganta tsarin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗin haɗ Daga sakamakon kayan aikin inji na zafin jiki na ɗaki, ana iya amfani da kayan aikin walda biyu da aka ba da shawarar. Shirin I ya yi amfani da waldi bar kusa da mahaifiyar kayan aiki, waldi suture aiki daidai da mahaifiyar kayan aiki, waldi suture ya kamata ya sami babban zafi karfi, waldi suture a dogon lokaci amfani da high zafi ba sauki lalata. Matsalar ita ce bayan walda zafi magani ƙayyadaddun ne mafi tsauri, bakin zafin jiki da kuma insulation lokaci da kuma dumama da kuma sanyaya gudun sarrafawa ba daidai ba maimakon haka zai haifar da walda suture aiki raguwa. Tsarin II ya yi amfani da Austenitic baken karfe walda bar walda, kodayake za a iya ceton walda bayan zafi magani, amma saboda walda seams da mothers fadada coefficient daban-daban, dogon lokaci high zafi aiki zai iya faruwa da carbon yaduwa hijira yanayin, da sauƙi haifar da walda seams lalacewa a hakewa yankin. Saboda haka, daga amfani da amincin la'akari, da filin amfani da tsarin I welding ne mafi aminci.

4 ƙarshe

15CrMo karfe kauri bango high matsin lamba bututun walda da amfani da biyu walda shirye-shirye ne m. Don tabbatar da walda suture aiki daidai da mahaifiyar kayan aiki da kuma da babban zafi karfi, da amfani da tsari I mafi kyau sakamako, mabuɗin shi ne a tsabta sarrafa bayan walda zafi magani tsari.

Tsarin II duk da cewa za a iya ceton maganin zafi bayan walda, amma yiwuwar warawar ƙaura na carbon da ke haifar da lalacewar walda ba za a iya watsi da shi ba, saboda haka, kawai lokacin da ba za a iya yin maganin zafi ba bayan walda.

15crmo karfe farantin nauyi lissafi formula: tsawon × fadi × kauri × 0.00785 = kg / m

waje zobe ya zama rawaya

15CrMo gami karfe farantin ne biyu Rolling Rolling a biyu waje zoben fara zama rawaya har yanzu ba rust abin da ya sa wannan?

Don share oxide baƙar ƙarfe na 15CrMo gami karfe farantin farfajiyar, a halin yanzu da yawa amfani da immersion ci gaba da acid wanke hanyar, da acid wanke bayan 15CrMo gami karfe farantin farfajiyar sau da yawa haɗe da acid ruwa, don wannan, bukatar ruwa mai sanyi ko ruwa mai zafi tsabtace, amma da wanke bayan 15CrMo gami karfe farantin farfajiyar sau da yawa samar da tsayi. Yana shafar ingancin farfajiyar samfurin da aka gama sosai. Japan ta yi nazarin tsarin rawaya don kawar da wannan lahani. Da hydrochloric acid misali kamar wannan reversal:

FeCl_2+2H_2O=Fe(0H)_2+2HCl (1) Tsarin wankewa

2Fe (OH) _2 + O_2 = 2FeO · OH + H_2O (2) bushewa tsari

Formula ((1) yana nuna daidaitaccen yanayin a cikin maganin ruwa a kan farfajiyar ruwa, Fe ((OH) _2 da HCl ba su da launin rawaya.

Formula ((2) shine farawa bushewa karfe farantin, saboda aikin oxygen a cikin iska, sa Fe ((OH) _2 oxidation, a cikin yanayin da ba ya narkewa a cikin ruwa. Sa'an nan FeO · OH ya zama tsayi a kan 15CrMo gami karfe farantin farfajiyar.

Chemical abubuwa

Chemical abubuwa

Alamar Samfurin sinadarai (ƙididdigar ƙididdiga) (%)

C Mn Si Cr Mo Ni Nb + Ta S P

15CrMo 0.12~0.18 0.40~0.70 0.17~0.37 0.80~1.10 0.40~0.55 ≤0.30 _ ≤0.035 ≤0.035

kayan aiki

alama Ji'a ƙarfi MPa yiwu maki MPa elongation (%)

15CrMo 440~640 235 21

Misali na aikace-aikace

Mai, petrochemical, high matsin lamba boiler, da sauransu, musamman amfani da seamless bututu da boiler da seamless bututu, geology da seamless karfe bututu da kuma man fetur da seamless bututu da sauransu

Bayani na yau da kullun

kayan bayanai kauri * fadi * tsawon (mm) daidaitacce Rolling a duk faɗin ƙarfe masana'antu Nauyi (ton) Sunan

15crmo 8 * 1500-4200 * 6000-18800M 198.65T gami tsarin karfe farantin

15crmo 12 * 1500-4200 * 6000-18800M 186.618T gami tsarin karfe farantin

15crmo 25 * 1500-4200 * 6000-18800M 258.366T gami tsarin karfe farantin

15crmo 30 * 1500-4200 * 6000-18800M 241.624T haɗin gwiwa tsarin karfe farantin

15crmo 45 * 1500-4200 * 6000-18800M 263.254T gami tsarin karfe farantin

15crmo 55 * 1500-4200 * 6000-18800M 283.318T gami tsarin karfe farantin

15crmo 60 * 1500-4200 * 6000-18800M 169.563T gami tsarin karfe farantin

15crmo 70 * 1500-4200 * 6000-18800M 569.356T haɗin gwiwa tsarin karfe farantin

15crmo 80 * 1500-4200 * 6000-18800M 231.315T haɗin gwiwa tsarin karfe farantin

15crmo 90 * 1500-4200 * 6000-18800M 341.318T haɗin gwiwa tsarin karfe farantin

15crmo 100 * 1500-4200 * 6000-18800M 461.318T haɗin gwiwa tsarin karfe farantin

15crmo 110 * 1500-4200 * 6000-18800M 598.359T haɗin gwiwa tsarin karfe farantin

15crmo 120 * 1500-4200 * 6000-18800M 431.621T haɗin gwiwa tsarin karfe farantin

15crmo 130 * 1500-4200 * 6000-18800M 388.654T haɗin gwiwa tsarin karfe farantin

15crmo 140 * 1500-4200 * 6000-18800M 348.351T haɗin gwiwa tsarin karfe farantin

15crmo 150 * 1500-4200 * 6000-18800M 645.982T haɗin gwiwa tsarin karfe farantin