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我厂采用熔点为1250℃的70％锰铁+30％硼砂焊剂对W18Cr4V钢刀具进行高频钎焊淬火。生产中因W18Cr4V钢经常短缺,故W6Cr5Mo4V2钢替代,由于W6Cr5Mo4V2钢较W18Cr4V钢的淬火温度低50～60℃,在不改变焊剂的情况下对W6Cr5Mo4V2钢进行钎焊淬火发现:若钎焊牢固了,刀头就过热或过烧;若保证刀头不过热则焊剂没熔化,钎焊不牢,使用时刀头脱落。经分析,产生上述情况的原因就是焊剂熔化温度远高于刀头淬火温度,不符合钎焊焊剂低于刀头淬火温度30～50℃的原则。为此我们研制一种熔点为1170℃左右的焊剂对
I plant the melting point of 1250 ℃ 70% ferromanganese + 30% borax flux W18Cr4V steel brazing tool for high-frequency brazing. W18Cr4V steel production due to frequent shortages, so W6Cr5Mo4V2 steel alternative, because W6Cr5Mo4V2 steel W18Cr4V steel quenching temperature lower than 50 ~ 60 ℃, without changing the flux of W6Cr5Mo4V2 brazing steel found: If the brazing solid, The cutter head is overheated or over burned; if the cutter head is not overheated, the flux does not melt, the brazing is not strong and the cutter head will fall off when used. After analysis, the reason for the above situation is that the melting temperature of the flux is much higher than the quenching temperature of the cutterhead, which is inconsistent with the principle that the flux of brazing flux is lower than the quenching temperature of the cutterhead by 30 ~ 50 ℃. To this end we have developed a melting point of about 1170 ℃ solder pair