Q690D yaxshi payvandlash ko'rsatkichiga ega bo'lgani uchun uni turli xil payvandlash jarayonlari bilan ulash mumkin. Quyidagi Q690D payvandlash jarayonlari keng tarqalgan:
1. Qo'lda elektr boshq manbai: J507 yoki J607 elektrodlari kabi payvandlash uchun past vodorod tipidagi payvandlash elektrodlaridan foydalaning. Payvandlash payvandlashdan oldin oldindan isitish bilan ishlov berish, 150 ° ~ 250 ° gacha bo'lgan isitish harorati, qatlamlar orasidagi haroratni saqlash uchun payvandlash jarayoni oldindan isitish haroratidan past bo'lmasligi kerak. Payvandlashdan keyin dehidrogenatsiya bilan ishlov berish kerak, ya'ni taxminan 200 daraja haroratda 2 soatdan ko'proq vaqtni saqlab turish kerak.
2. suv ostida payvandlash: H13Mn2TiA yoki H13Mn2MoA simi kabi payvandlash uchun past vodorodli suv osti payvandlash paychalarining foydalanish. Payvandlash payvandlashdan oldin oldindan isitish bilan ishlov berish, 150 ° ~ 250 ° gacha bo'lgan isitish harorati, qatlamlar orasidagi haroratni saqlash uchun payvandlash jarayoni oldindan isitish haroratidan past bo'lmasligi kerak. Payvandlashdan so'ng dehidrogenlash kerak, ya'ni taxminan 200 daraja 2 soatdan ortiq.
3. Gazdan himoyalangan payvandlash: CO2 gazidan himoyalangan payvandlash yoki aralash gaz bilan himoyalangan payvandlash (Ar+CO2) va payvandlash uchun H13Mn2MoA yoki H13Mn2TiA kabi past vodorodli turdagi payvandlash paychalarining foydalaning. Payvandlashdan oldin oldindan qizdirish jarayoni amalga oshirilishi kerak, oldindan qizdirish harorati 150 daraja -250 daraja bo'lishi kerak va qatlamlar orasidagi harorat payvandlash paytida oldindan isitish haroratidan past bo'lmasligi kerak. Payvandlashdan keyin dehidrogenatsiya bilan ishlov berish kerak, ya'ni taxminan 200 daraja haroratda 2 soatdan ko'proq vaqtni saqlab turish kerak.
4. Qarshilik payvandlash: ulanish uchun spotli payvandlash yoki proektsion payvandlash jarayoni. Ishlash uchun maxsus elektrod bilan nuqta payvandlash, ulanish nuqtasi sifatida mos keladigan bo'rtiq bilan konveks payvandlash. Payvandlash uchun tegishli oqim va elektrod bosimini tanlash uchun payvandlash haqiqiy vaziyatga asoslangan bo'lishi kerak.
