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焊接材料母材：30Clinlr1Oi焊接方法点焊图1点焊焊核区整体形貌8×（2／3）（焊接接头馆核区柱状晶垂直于试板结合面）图2焊缝熔核区组织400×（2／3）（片状马氏体十板条马氏体十少量贝氏体）图3接头过热区组织200×（2／3）（马氏体＋贝氏体）图4接头正火区组织（2／3）（马?
Welding material Base material: 30Clinlr1Oi Welding method Spot welding Figure 1 The overall appearance of the spot welding nugget area 8 × (2/3) (columnar grain welded joints core zone perpendicular to the test plate bonding surface) Figure 2 weld nugget zone organization 400 × (2/3) (sheet martensite ten lath martensite ten small bainite) Fig.3 Microstructure of joint overheated zone 200 × (2/3) (martensite + bainite) Fig.4 Joint Normalizing zone organization (2/3) (Ma?