進(jìn)口曼徹特904L 309L不銹鋼焊絲用途焊條牌號(hào)編輯 此類鉻鋼通常為改善耐蝕性及可焊性而加適量的穩(wěn)定化元素鈦、鈮、鉬,可焊性較鉻13鋼為好,可采用同類型的鉻不銹綱焊條(CHK302、CHK307)焊接。焊前,焊件應(yīng)進(jìn)行200℃左右預(yù)熱,焊后進(jìn)行800℃左右的回火處理。也可采用鉻鎳不銹鋼焊條(如CHS107、CHS207),焊后不進(jìn)行熱處理。 3、鉻17不銹鋼的焊接 此類鉻鋼焊接后硬化性較大,容易產(chǎn)生裂紋,若采用同類的鉻不銹鋼焊條(CHK202、CHK207)焊接,則必須進(jìn)行300℃以上的預(yù)熱和焊后700℃左右的回火緩冷處理。若焊件不能進(jìn)行焊后處理,則應(yīng)用鉻不銹鋼焊條(CHS107、CHS207)等焊接。 2、鉻13不銹鋼的焊接 馬氏體不銹鋼包括含鉻5~9%的中鉻鋼和含鉻12%的高鉻鋼。此類鋼淬硬傾向大,焊后易產(chǎn)生高硬度的馬氏體和貝氏體使脆性增加,殘余應(yīng)力也較大,容易產(chǎn)生冷裂縫。故一般焊前必須進(jìn)行預(yù)熱及層間保溫,焊后尚未冷卻前進(jìn)行高溫回火。 1、馬氏體不銹鋼焊條 分類編輯 9、異種鋼的焊接應(yīng)慎重選用焊條,防止焊條選用不當(dāng)出現(xiàn)熱裂紋或高溫?zé)崽幚砗笠穰蚁辔龀觯菇饘俅嗷?。參照不銹鋼與異種鋼的焊條選擇標(biāo)準(zhǔn)進(jìn)行選用,并采取適當(dāng)焊接工藝。SMAW THERMET R17.38H Electrode for high C 18/37 alloys > Details
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