今日广州市场方管价格主流维稳运行厂家出货…方管今日广州市场方管价格主流维稳运行，市场成 交变化不大，正常偏弱。期货今日单边走高推涨，原材料方面现昌黎普碳方坯含税出厂3320元/吨涨10元。现货市场广州方管今日开价主流持稳，部分盘螺资源小幅拉涨10-20元，当地及周边钢厂也都报价平稳。据了解当地汽运本周结束后将不再接长途运单，需求来看目前已有一部…

镀锌方管热处理的十个要点：一、镀锌方管及夹具在热处理前均应清除油污、残盐、油漆等外来物;二、在真空炉中首次使用的夹具，应预先在不低于工件所要求的真空度下进行除气净化处理;三、在热处理过程中易变形工件，应在专用夹具上进行加热。预热的方法有：一次预热为800℃，二次预热为500-550℃和850℃，一次预热升温度速度应限制;

Ten key points for heat treatment of galvanized square tubes are as follows: 1. Before heat treatment, galvanized square tubes and fixtures should remove foreign substances such as oil, residual salt and paint; 2. Fixtures first used in vacuum furnaces should be degassed and purified in advance at the vacuum required by the workpiece; 3. Workpieces easily deformed during heat treatment should be heated on special fixtures. The preheating methods are as follows: primary preheating is 800 C, secondary preheating is 500 - 550 C and 850 C, and the speed of primary preheating should be limited. 四、对于形状复杂或截面有急剧变化以及有效厚度较大的工件，应进行预热;五、有凹槽不通孔的工件、铸件和焊接件以及加工成形的不锈钢工件，一般不宜在盐浴炉中加热;六、镀锌方管加热应有足够的保温时间，可根据工件有效厚度和条件厚度(实际厚度乘以工件形状系数);

4. For workpieces with complex shapes or sharp changes in cross sections and large effective thickness, preheating should be carried out; 5. Workpieces with grooves and no through holes, castings and welds, and stainless steel workpieces processed and formed, generally, should not be heated in a salt bath furnace; 6. Galvanized square tubes should be heated with sufficient holding time, which can be multiplied by the effective thickness and conditional thickness of the workpiece (actual thickness multiplied by workpiece thickness). Shape coefficient;

七、马氏体不锈钢和耐热钢镀锌方管淬火冷至室温后方可进行清洗、深冷处理或回火，焊接和其后的热处理之间的时间间隔不应超过4小时;八、根据镀锌方管要求和表面状况采用碱洗、水溶性清洗剂、氯溶剂喷砂，喷丸等方法进行清理;九、矫正后应在低于原回火温度下进行去应力退火，形状复杂或尺寸要求严格工件，矫正后在回火时用定形夹具结合回火进行矫正;十、当镀锌方管力学性能不合格时，可重复热处理，但重复淬火或固溶次数一般不超过二次。镀锌方管的补充回火不算作重复处理。淬火状态或低温回火后的马氏体不锈钢和耐热钢工件，重复淬火前应进行预热，退火或高温回火。

7. After quenching and cooling to room temperature, galvanized square tubes of martensitic stainless steel and heat-resistant steel can be cleaned, cryogenically treated or tempered. The time interval between welding and subsequent heat treatment should not exceed 4 hours. 8. According to the requirements and surface conditions of galvanized square tubes, alkali washing, water-soluble cleaning agent, chlorine solvent sandblasting, shot blasting and other methods should be used for cleaning. 9. After rectification, the temperature should be lower than the original tempering temperature. Stress-relief annealing is carried out under the degree of stress, and the workpiece with complex shape or strict size is required. After correction, the workpiece is corrected by setting fixture combined with tempering when tempering. 10. When the mechanical properties of galvanized square tubes are not up to standard, heat treatment can be repeated, but the number of repeated quenching or solid solution does not exceed twice. Supplementary tempering of galvanized square tubes is not regarded as repetitive treatment. Martensitic stainless steel and heat-resistant steel workpieces after quenching or low temperature tempering should be preheated, annealed or tempered at high temperature before repeated quenching.

武汉方管价格持成交量日渐萎缩厂家报价暂稳…方管武汉镀锌方管价格持稳，成交较弱。早盘期货走势震荡偏强，方管厂家报价暂稳观望，主流成交价格在3960-3970元/吨。前几日需求清淡，成交量日渐萎缩，但今日受期货刺激，下游稍有采购情 绪，适逢节假日部分备货需求仍存，成交较昨日稍有好转。资源方面，目前萍钢、鄂钢、重钢发货速度减慢，到货减少，恒润、西城、汉冶短期仍有… 南京市场方管价格或窄幅调整厂家仍在观望方管南京方管价格以稳为主，个别低价有所上调。截止发稿时，南钢三级大螺纹3940元(吨价，下同)。 今天期螺高开低走，唐山方坯涨10元，现普碳方坯含税出厂3330元。从市场了解，目前下游需求几乎停滞，成交困难。一些钢厂已出台优惠政策，不过力度一 般，大多方管厂家仍在观望，市场到货依旧不多。宏观方面：中美将于下周签署第一阶…