Forging method of water supply connecting tube and secondary side manhole
A secondary side and water supply technology, applied in the field of forging, can solve problems such as failure to meet standards, very high performance requirements for forgings, and inability to achieve localization, etc., to achieve the effect of meeting technical requirements and improving reliability
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Embodiment 1
[0026] Embodiment 1: the requirement of manufacturing process among the present embodiment is:
[0027] 1. Material selection:
[0028] Choose 22" square ingot for forging secondary side manhole; choose 28" octagonal ingot for forging water supply connection, the chemical composition of the 22" square ingot and 28" octagonal ingot should meet the following requirements:
[0029] Trace ≤ C ≤ 0.20%, 0.10% ≤ Si ≤ 0.30%, 1.15% ≤ Mn ≤ 1.60%, Trace ≤ P ≤ 0.012%, Trace ≤ S ≤ 0.012%, Trace ≤ Cr ≤ 0.25%, 0.50% ≤Ni≤0.80%, 0.45%≤Mo≤0.55%, trace ≤V≤0.03%, trace ≤Cu≤0.20%, 0.01%≤Al≤0.04%, 0≤H≤0.00008%, the balance is Fe and unavoidable impurities.
[0030] 2. Forging:
[0031] Cutting percentage of head and tail: 15% head cut and 10% tail cut for 28″ octagonal ingot; 13% head cut and 10% tail cut for 22″ square ingot.
[0032] a) heating the steel ingot to 600°C and keeping it for 3 hours; then heating for 4 hours to make the temperature reach 800°C and keeping it for 3 hours; then hea...
Embodiment 2
[0045] Embodiment 2: the requirement of manufacturing process among the present embodiment is:
[0046] 1. Material selection:
[0047] Choose 22" square ingot for forging secondary side manhole; choose 28" octagonal ingot for forging water supply connection, the chemical composition of the 22" square ingot and 28" octagonal ingot should meet the following requirements:
[0048] Trace ≤ C ≤ 0.20%, 0.10% ≤ Si ≤ 0.30%, 1.15% ≤ Mn ≤ 1.60%, Trace ≤ P ≤ 0.012%, Trace ≤ S ≤ 0.012%, Trace ≤ Cr ≤ 0.25%, 0.50% ≤Ni≤0.80%, 0.45%≤Mo≤0.55%, trace ≤V≤0.03%, trace ≤Cu≤0.20%, 0.01%≤Al≤0.04%, 0≤H≤0.00008%, the balance is Fe and unavoidable impurities.
[0049] 2. Forging:
[0050] Cutting percentage of head and tail: 15% head cut and 10% tail cut for 28″ octagonal ingot; 13% head cut and 10% tail cut for 22″ square ingot.
[0051] a) heating the steel ingot to 600°C and keeping it for 3 hours; then heating for 4 hours to make the temperature reach 800°C and keeping it for 3 hours; then hea...
Embodiment 3
[0064] Embodiment 3: the requirement of manufacturing process among the present embodiment is:
[0065] 1. Material selection:
[0066] Choose 22" square ingot for forging secondary side manhole; choose 28" octagonal ingot for forging water supply connection, the chemical composition of the 22" square ingot and 28" octagonal ingot should meet the following requirements:
[0067] Trace ≤ C ≤ 0.20%, 0.10% ≤ Si ≤ 0.30%, 1.15% ≤ Mn ≤ 1.60%, Trace ≤ P ≤ 0.012%, Trace ≤ S ≤ 0.012%, Trace ≤ Cr ≤ 0.25%, 0.50% ≤Ni≤0.80%, 0.45%≤Mo≤0.55%, trace ≤V≤0.03%, trace ≤Cu≤0.20%, 0.01%≤Al≤0.04%, 0≤H≤0.00008%, the balance is Fe and unavoidable impurities.
[0068] 2. Forging:
[0069] Cutting percentage of head and tail: 15% head cut and 10% tail cut for 28″ octagonal ingot; 13% head cut and 10% tail cut for 22″ square ingot.
[0070] a) heating the steel ingot to 600°C and keeping it for 3 hours; then heating for 4 hours to make the temperature reach 800°C and keeping it for 3 hours; then hea...
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