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Cast iron flat plate manufacturer, Yasheng Machinery Cast Iron Factory, product quality is first-class

total supply
11111 吨
MOQ
1 吨
brand
亚晟机械
area
HebeiCangzhou City
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area:Hebei Cangzhou City

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Botou Yasheng Machinery Co

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Product Details
规格:
齐全
型号:
齐全

铸铁平台淬火为了提高某些铸件的表面硬度、耐磨性以及疲劳强度,可采用表面淬火。灰口铸铁平台和球墨铸铁平台均可进行表面淬火。球墨铸铁件在进行表面淬火前应进行正火(预先热处理),以保证基体组织中珠光体量达到75%以上,这样可以达到表面淬火的良好效果。淬火冷却时,既要保证表面加热层能充分完成马氏体转变,又不致产生淬火裂纹,所以一般不应冷透。如采用喷水冷却时,喷水至250℃即可停止喷水,利用淬火余热进行自回火。也可在淬火后及时送进回火炉中回火。
铸铁平退火是为了消除平台铸件内部应力从面让平台达到组织稳定。由于铸铁平台铸件壁厚不均匀,在冷却及发生组织转变的过程中会产生热应力和组织应力,这些内应力的存在将导致铸件在机械加工后发生变形,从而不能保证加工精度。大型铸件在机械加工以后,其内部也易残存应力。所有这些铸件都需要在粗加工后进行消除应力退火。铸件的消除应力退火通常是将铸件以50~100℃/h的速度加热到500~550℃,保温2~8h,然后炉冷(灰铸铁)或空冷(球墨铸铁)。
电话:0317- 8290311          传真:0317-8033919         QQ:969099834
手机:18733036768   18733086638        网址:www.hbpbpt.com
源文件网址:http://www.hbpbpt.com/news/201408/670.html
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