Menene zan yi idan akwai ramukan walda a cikin sarrafa tsarin karfe?

A wajen sarrafa sassan karafa, musamman a harkar walda, akwai bayanai da dama da ya kamata a lura da su da kuma hana su tun da wuri, kamar yadda za a magance ramukan walda, wanda ake kyautata zaton matsala ce mai sarkakiya da ta addabi masana'antun sarrafa karafa da dama.Nemo tare da ku na gaba.

Da farko, bari mu fahimci dacewa dokokin game da walda pores a karfe tsarin sarrafa: na farko da na biyu sa welds ba a yarda su sami porosity lahani;na uku sa welds an yarda su sami diamita <0.1t da ≤3mm ta 50mm tsawon welds.Akwai ramukan iska guda 2;tazarar ramin ya zama ≥ sau 6 da diamita na ramin.

Na gaba, za mu bincika takamaiman dalilai na samuwar waɗannan pores na walda a cikin sarrafa tsarin ƙarfe:

1. Akwai tabo mai, tsatsa, dattin ruwa da datti (musamman alamomin fenti) a cikin ramin da ke kewaye da shi, wanda hakan na daya daga cikin dalilan bayyanar pores a cikin walda;

2. An bare Layer plating na tagulla na waya mai waldawa, ta yadda sashin ya yi tsatsa, sannan kabu na walda kuma zai haifar da pores;

3. The post-dumama (deoxidation) na lokacin farin ciki workpiece ba a za'ayi a cikin lokaci bayan waldi, ko post-dumama zafin jiki bai isa ba, ko riƙe lokaci bai isa ba, wanda zai iya haifar da saura pores a cikin weld;

4. Akwai dangantaka ta kai tsaye tsakanin raƙuman ruwa da zafin jiki na yin burodi na kayan walda, saurin zafi yana da sauri, kuma lokacin riƙewa bai isa ba.

Bayan fahimtar abubuwan da ke haifar da porosity na walda a cikin sarrafa tsarin karfe, yana da mahimmanci a koyi matakan rigakafinsa:

1. Surface pores tare da karamin lamba da ƙananan diamita za a iya kasa tare da angular nika dabaran, har sai wannan bangare zai iya smoothly miƙa mulki tare da dukan weld da smoothly canzawa zuwa tushe karfe;

2. A lokacin farin ciki workpiece ya kamata a preheated kafin waldi da kuma kai da yawan zafin jiki da ake bukata da ƙayyadaddun.Ya kamata kayan aiki masu kauri ya kamata su sarrafa zafin jiki sosai tsakanin waƙoƙi;

3. Ya kamata a toya kayan walda kuma a kiyaye dumi bisa ga ka'idoji, kuma kada su kasance cikin yanayi fiye da sa'o'i 4 bayan amfani da su;

4. Kula da yanayin walda yayin walda.Ya kamata a dakatar da walda lokacin da yanayin zafi ya fi 90%;Ana yin walda ta hannun hannu lokacin da iskar gudun ya wuce 8m/s, kuma ana yin walda mai kariya da iskar gas lokacin da iskar ta wuce 2m/s.Lokacin da zafin jiki ya ƙasa da 0 ° C, aikin aikin ya kamata a mai tsanani zuwa 20 ° C, kuma aikin da za a yi preheated ya kamata a preheated da 20 ° C a wannan lokacin.

5. Kula da sigogin tsarin walda da haɓaka ƙwarewar masu walda.Ya kamata a hura ganga na walda mai kariya ta iskar da aka matse akai-akai don cire datti.

Cikakkun bayanai sun ƙayyade nasara ko gazawa, kuma akwai dama da yawa don matsaloli a cikin walda, wanda shine abin lura musamman a sarrafa tsarin ƙarfe.