Method for manufacturing martensitic stainless steel continuous casting billet extruded seamless pipe
A martensitic stainless steel and manufacturing method technology, applied in the field of steel manufacturing, can solve the problems of uneven product quality, insufficient technical ability, and high manufacturing cost, and achieve the effects of stable product quality, prominent process advantages, and reduced cost
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[0028] Example 1
[0029] A manufacturing method of martensitic stainless steel continuous casting billet extruded seamless pipe, the steps are as follows:
[0030] The first step is to prepare the billet. The material of the continuous casting billet is L80-13Cr, and the specification of the continuous casting billet is Φ430mm.
[0031] The second step is peeling and segmentation. Due to the rough surface of the continuous casting slab, peeling processing is required. The processing specification is Φ415mm and the segment length is 820mm.
[0032] The third step is to drill and process the bell mouth. Because the continuous casting billet is characterized by loose cores, shrinkage holes and other defects that are not conducive to extrusion, the feature of the extrusion process is that the center of the billet needs to be drilled. The diameter of the hole is 80mm, and the end machined bell mouth, the bell mouth taper is 42°.
[0033] The fourth step is cleaning and preheating. After the c
Example Embodiment
[0038] Example 2
[0039] A manufacturing method of martensitic stainless steel continuous casting billet extruded seamless pipe, the steps are as follows:
[0040] The first step is to prepare the billet. The material of the continuous casting billet is L80-13Cr, and the specification of the continuous casting billet is Φ220mm.
[0041] The second step is peeling and segmentation. Due to the rough surface of the continuous casting billet, peeling processing is required. The processing specification is Φ213mm and the segment length is 541mm.
[0042] The third step is to drill and process the bell mouth. Because the continuous casting billet is characterized by loose cores, shrinkage holes and other defects that are not conducive to extrusion, the feature of the extrusion process is that the center of the billet needs to be drilled. The diameter of the hole is 30mm, and the end machined bell mouth, the bell mouth taper is 38°.
[0043] The fourth step is cleaning and preheating. After the
Example Embodiment
[0048] Example 3
[0049] A manufacturing method of martensitic stainless steel continuous casting billet extruded seamless pipe, the steps are as follows:
[0050] The first step is to prepare the billet. The material of the continuous casting billet is L80-9Cr, and the specification of the continuous casting billet is Φ310mm.
[0051] The second step, peeling and segmentation, due to the rough surface of the continuous casting billet, peeling processing is required. The processing specification is Φ299mm, and the segment length is 634mm;
[0052] The third step is to drill and process the bell mouth. Because the continuous casting billet is characterized by loose cores, shrinkage holes and other defects that are not conducive to extrusion, the feature of the extrusion process is that the center of the billet needs to be drilled. The diameter of the hole is 65mm, and the end machined bell mouth, the bell mouth taper is 42°.
[0053] The fourth step is cleaning and preheating. After the c
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