Lub hauv paus ntsiab lus ntawm induction cua sov quenching thiab self-tempering ntawm welds

Txoj kev kho cua sov weld yog tsim rau cov pa roj carbon tsawg thiab cov hlau tsis tshua muaj hlau welded yeeb nkab vuam cua sov kho, thiab nws cov hauv paus ntsiab lus yog raws li hauv qab no.

(1) Refining cov nplej ntawm weld hlau. Qhov kub siab ntawm vuam fusion ua rau cov nplej ntawm cov weld thiab tshav kub-cuam tshuam cheeb tsam coarser, txo nws lub zog thiab toughness. Tom qab cov cua sov induction yog siv los ua kom kub ceev rau qhov ntsuas kub austenitizing, cov nplej zoo tau txais los ntawm kev ceev ceev, uas tshem tawm cov nplej coarsening ntawm weld thiab txhim kho nws cov kev ua tau zoo.

(2) Siv quenching residual cua sov los ua kom tsis tshua muaj kub tempering vuam seam cua sov kom quenching kub, tam sim ntawd tsuag dej txias, thaum vuam seam txias rau 200 ~ 300 ° C, tsis txhob tsuag dej txias, lub sij hawm no lub vuam seam kub. yog hu ua quenching termination kub. Tom qab ntawd lub vuam yog txias rau hauv huab cua rau nws tus kheej-tempering, thiab tus kheej-tempering kub yog 250 ~ 150 ° C. Thaum lub vuam txias txias los ntawm austenitizing quenching kub mus rau 200 ~ 300 ° C, cov qauv sib xyaw ntawm martensite thiab khaws cia austenite yog tsim. Thaum tempered ntawm qhov kub ntawm 250 ~ 150 ° C, lub martensite nyob rau hauv lub weld decomposes kom txo cov hardness, thaum lub retained austenite hloov mus rau hauv bainite los yog tempered martensite, uas ua rau kom lub hardness. Raws li kev sib xyaw ua ke ntawm qhov nce thiab txo qis, cov hlau welding muaj zog thiab zoo toughness.

Nyob rau hauv luv luv, tom qab cua kub ceev thiab austenitizing thiab quenching, weld hlau nplej yog refined. Nyob rau tib lub sijhawm, quenching termination kub yog tswj kom muaj qhov zoo toughness ntawm weld. Tom qab tsis tshua muaj kub tempering, zoo tempered martensite qauv yog tau, thiaj li hais tias cov weld muaj siab toughness thiab siab zog. Qhov no yog lub hauv paus ntsiab lus ntawm induction cua sov quenching thiab self-tempering ntawm welds.

Lub hauv paus ntsiab lus ntawm induction cua sov quenching thiab self-tempering ntawm welds

Txoj kev kho cua sov weld yog tsim rau cov pa roj carbon tsawg thiab cov hlau tsis tshua muaj hlau welded yeeb nkab vuam cua sov kho, thiab nws cov hauv paus ntsiab lus yog raws li hauv qab no.

(1) Refining cov nplej ntawm weld hlau. Qhov kub siab ntawm vuam fusion ua rau cov nplej ntawm cov weld thiab tshav kub-cuam tshuam cheeb tsam coarser, txo nws lub zog thiab toughness. Tom qab cov cua sov induction yog siv los ua kom kub ceev rau qhov ntsuas kub austenitizing, cov nplej zoo tau txais los ntawm kev ceev ceev, uas tshem tawm cov nplej coarsening ntawm weld thiab txhim kho nws cov kev ua tau zoo.

(2) Siv quenching residual cua sov los ua kom tsis tshua muaj kub tempering vuam seam cua sov kom quenching kub, tam sim ntawd tsuag dej txias, thaum vuam seam txias rau 200 ~ 300 ° C, tsis txhob tsuag dej txias, lub sij hawm no lub vuam seam kub. yog hu ua quenching termination kub. Tom qab ntawd lub vuam yog txias rau hauv huab cua rau nws tus kheej-tempering, thiab tus kheej-tempering kub yog 250 ~ 150 ° C. Thaum lub vuam txias txias los ntawm austenitizing quenching kub mus rau 200 ~ 300 ° C, cov qauv sib xyaw ntawm martensite thiab khaws cia austenite yog tsim. Thaum tempered ntawm qhov kub ntawm 250 ~ 150 ° C, lub martensite nyob rau hauv lub weld decomposes kom txo cov hardness, thaum lub retained austenite hloov mus rau hauv bainite los yog tempered martensite, uas ua rau kom lub hardness. Raws li kev sib xyaw ua ke ntawm qhov nce thiab txo qis, cov hlau welding muaj zog thiab zoo toughness.

Nyob rau hauv luv luv, tom qab cua kub ceev thiab austenitizing thiab quenching, weld hlau nplej yog refined. Nyob rau tib lub sijhawm, quenching termination kub yog tswj kom muaj qhov zoo toughness ntawm weld. Tom qab tsis tshua muaj kub tempering, zoo tempered martensite qauv yog tau, thiaj li hais tias cov weld muaj siab toughness thiab siab zog. Qhov no yog lub hauv paus ntsiab lus ntawm induction cua sov quenching thiab self-tempering ntawm welds.